Weather Guard Lightning Tech

Siemens Rejects SGRE Sale, Quali Drone Thermal Imaging
Allen, Joel, and Yolanda discuss Siemens Energy’s decision to keep their wind business despite pressure from hedge funds, with the CEO projecting profitability by 2026. They cover the company’s 21 megawatt offshore turbine now in testing and why it could be a game changer. Plus, Danish startup Quali Drone demonstrates thermal imaging of spinning blades at an offshore wind farm, and Alliant Energy moves forward with a 270 MW wind project in Wisconsin using next-generation Nordex turbines.
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The Uptime Wind Energy Podcast brought to you by Strike Tape, protecting thousands of wind turbines from lightning damage worldwide. Visit strike tape.com. And now your hosts, Alan Hall, Rosemary Barnes, Joel Saxon, and Yolanda Padron. Welcome to the
Allen Hall: Uptime Wind Energy Podcast. I’m your host, Alan Hall. I’m here with Yolanda Padron and Joel Saxon.
Rosemary Burns is climbing the Himalayas this week, and our top story is Semen’s Energy is rejecting the sail of their wind business, which is a very interesting take because obviously Siemens CESA has struggled. Recently due to some quality issues a couple of years ago, and, and back in 2024 to 25, that fiscal year, they lost a little over 1 billion euros.
But the CEO of Siemens energy says they’re gonna stick with the business and that they’re getting a lot of pressure, obviously, from hedge funds to do something with that business to, to raise the [00:01:00] valuations of Siemens energy. But, uh, the CEO is saying, uh, that. They’re not gonna spin it off and that would not solve any of the problems.
And they’re, they’re going to, uh, remain with the technology, uh, for the time being. And they think right now that Siemens Gomesa will be profitable in 2026. That’s an interesting take, uh, Joel, because we haven’t seen a lot of sales onshore or offshore from Siemens lately.
Joel Saxum: I think they’re crazy to lose. I don’t wanna put this in US dollars ’cause it resonates with my mind more, but 1.36 billion euros is probably what, 1.8 million or 1.8.
Billion dollars.
Allen Hall: Yeah. It’s, it’s about that. Yeah.
Joel Saxum: Yeah. So, so it’s compounding issues. We see this with a lot of the OEMs and blade manufacturers and stuff, right? They, they didn’t do any sales of their four x five x platform for like a year while they’re trying to reset the issues they had there. And now we know that they’re in the midst of some blade issues where they’re swapping blades at certain wind farms and those kind of things.[00:02:00]
But when they went to basically say, Hey, we’re back in the market, restarting, uh, sales. Yolanda, have you heard from any of your blade network of people buying those turbines?
Yolanda Padron: No, and I think, I mean, we’ve seen with other OEMs when they try to go back into getting more sales, they focus a lot on making their current customers happy, and I’m not sure that I’ve seen that with the, this group.
So it’s, it’s just a little bit of lose lose on both sides.
Joel Saxum: Yeah. And if you’re, if you’re trying to, if you’re having to go back and basically patch up relationships to make them happy. Uh, that four x five x was quite the flop, uh, I would say, uh, with the issues that it had. So, um, there’s, that’d be a lot of, a lot of, a lot of nice dinners and a lot of hand kissing and, and all kinds of stuff to make those relationships back to what they were.
Allen Hall: But at the time, Joel, that turbine fit a specific set of the marketplace, they had basically complete control of that when the four x five [00:03:00] x. Was an option and and early on it did seem to have pretty wide adoption. They were making good progress and then the quality issues popped up. What have we seen since and more recently in terms of.
The way that, uh, Siemens Ga Mesa has restructured their business. What have we heard?
Joel Saxum: Well, they, they leaned more and pointed more towards offshore, right? They wanted to be healthy in, they had offshore realm and make sales there. Um, and that portion, because it was a completely different turbine model, that portion went, went along well, but in the meantime, right, they fit that four x five x and when I say four x five x, of course, I mean four megawatt, five megawatt slot, right?
And if you look at, uh, the models that are out there for the onshore side of things. That, that’s kind of how they all fit. There was like, you know, GE was in that two x and, and, uh, uh, you know, mid two X range investors had the two point ohs, and there’s more turbine models coming into that space. And in the US when you go above basically 500 foot [00:04:00] above ground level, right?
So if your elevation is a thousand, once you hit 1500 for tip height on a turbine, you get into the next category of FAA, uh, airplane problems. So if you’re going to put in a. If you were gonna put in a four x or five x machine and you’re gonna have to deal with those problems anyways, why not put a five and a half, a six, a 6.8, which we’ve been seeing, right?
So the GE Cypress at 6.8, um, we’re hearing of um, not necessarily the United States, but envision putting in some seven, uh, plus megawatt machines out there on shore. So I think that people are making the leap past. Two x three x, and they’re saying like, oh, we could do a four x or five x, but if we’re gonna do that, why don’t we just put a six x in?
Allen Hall: Well, Siemens has set itself apart now with a 21 megawatt, uh, offshore turbine, which is in trials at the moment. That could be a real game changer, particularly because the amount of offshore wind that’ll happen around Europe. Does that then if you’re looking at the [00:05:00] order book for Siemens, when you saw a 21 Mega Hut turbine, that’s a lot of euros per turbine.
Somebody’s projecting within Siemens, uh, that they’re gonna break even in 2026. I think the way that they do that, it has to be some really nice offshore sales. Isn’t that the pathway?
Joel Saxum: Yeah. You look at the megawatt class and what happened there, right? So what was it two years ago? Vestas? Chief said, we are not building anything past the 15 megawatt right now.
So they have their, their V 2 36 15 megawatt dark drive model that they’re selling into the market, that they’re kind of like, this is the cap, like we’re working on this one now we’re gonna get this right. Which to be honest with you, that’s an approach that I like. Um, and then you have the ge So in this market, right, the, the big megawatt offshore ones for the Western OEMs, you have the GE 15 megawatt, Hayley IX, and GE.
ISS not selling more of those right now. So you have Vestas sitting at 15, GE at 15, but not doing anymore. [00:06:00] And GE was looking at developing an 18, but they have recently said we are not doing the 18 anymore. So now from western OEMs, the only big dog offshore turbine there is, is a 21. And again, if you were now that now this is working out opposite inverse in their favor, if you were going to put a 15 in, it’s not that much of a stretch engineering wise to put a 21 in right When it comes to.
The geotechnical investigations and how we need to make the foundations and the shipping and the this and the, that, 15 to 21, not that big of a deal, but 21 makes you that much, uh, more attractive, uh, offshore.
Allen Hall: Sure if fewer cables, fewer mono piles, everything gets a little bit simpler. Maybe that’s where Siemens sees the future.
That would, to me, is the only slot where Siemens can really gain ground quickly. Onshore is still gonna be a battle. It always is. Offshore is a little more, uh, difficult space, obviously, just because it’s really [00:07:00] Chinese turbines offshore, big Chinese turbines, 25 plus megawatt is what we’re talking about coming outta China or something.
European, 21 megawatt from Siemens.
Joel Saxum: Do the math right? That, uh, if, if you have, if you have won an offshore auction and you need to backfill into a megawatts or gigawatts of. Of demand for every three turbines that you would build at 15 or every four turbines you build at 15, you only need three at 21.
Right? And you’re still a little bit above capacity. So the big, one of the big cost drivers we know offshore is cables. You hit it on the head when you’re like, cables, cables, cables, inter array cables are freaking expensive. They’re not only expensive to build and lay, they’re expensive to ensure, they’re expensive to maintain.
There’s a lot of things here, so. When you talk about saving costs offshore, if you look at any of those cool models in the startup companies that are optimizing layouts and all these great things, a lot of [00:08:00] them are focusing on reducing cables because that’s a big, huge cost saver. Um, I, I think that’s, I mean, if I was building one and, and had the option right now, that’s where I would stare at offshore.
Allen Hall: Does anybody know when that Siemens 21 megawatt machine, which is being evaluated at a test site right now, when that will wrap up testing, is it gonna be in the next couple of months?
Joel Saxum: I think it’s at Estro.
Allen Hall: Yeah, it is, but I don’t remember when it was started. It was sometime during the fall of last year, so it’s probably been operational three, four months at this point.
Something like that.
Joel Saxum: If you trust Google, it says full commercial availability towards the end, uh, of 28.
Allen Hall: 28. Do you think that the, uh, that Siemens internally is trying to push that to the left on the schedule, bringing from 2028 back into maybe early 27? Remember, AR seven, uh, for the uk the auction round?[00:09:00]
Just happened, and that’s 8.4 gigawatts of offshore wind. You think Siemens is gonna make a big push to get into that, uh, into the water there for, for that auction, which is mostly RWE.
Joel Saxum: Yeah, so the prototype’s been installed for, since April 2nd, 2025. So it’s only been in there in the, and it’s only been flying for eight months.
Um, but yeah, I mean, RWE being a big German company, Siemens, ESA being a big German company. Uh, of course you would think they would want to go to the hometown and and get it out there, but will it be ready? I don’t know. I don’t know. I, I personally don’t know. And there’s probably people that are listening right now that do have this information.
If this turbine model has been specked in any of the pre-feed documentation or preferred turbine suppliers, I, I don’t know. Um, of course we, I’m sure someone does. It’s listening. Uh, reach out, shoot us at LinkedIn or something like that. Let us know, but. Uh, yeah, I mean, uh, [00:10:00] Yolanda, so, so from a Blades perspective, of course you’re our local, one of our local blade experts here.
It’s difficult to work, it’s gonna be difficult to work on these blades. It’s a 276 meter rotor, right? So it’s 135 meter blade. Is it worth it to go to that and install less of them than work on something a little bit smaller?
Yolanda Padron: I think it’s a, it’s a personal preference. I like the idea of having something that’s been done.
So if it’s something that I know or something that I, I know someone who’s worked with them, so there’s at least a colleague or something that I, I know that if there’s something off happening with the blade, I can talk to someone about it. Right? We can validate data with each other because love the OEMs, but they’re very, it’s very typical that they’ll say that anything is, you know.
Anything is, is not a serial defect and anything is force majeure and wow, this is the first time I’m seeing this in your [00:11:00] blade. Uh, so if it’s a new technology versus old technology, I’d rather have the old one just so I, I at least know what I’m dealing with. Uh, so I guess that answers the question as far as like these new experimental lights, right?
As far as. Whether I would rather have less blades to deal with. Yes, I’d rather have less bilities to, to deal with it. They were all, you know, known technologies and one was just larger than the other one.
Joel Saxum: Maybe it boils down to a CapEx question, right? So dollar per megawatt. What’s gonna be the cost of these things be?
Because we know right now could, yeah, kudos to Siemens CESA for actually putting this turbine out at atrial, or, I can’t remember if it’s Australia or if it’s Keyside somewhere. We know that the test blades are serial number 0 0 0 1 and zero two. Right. And we also know that when there’s a prototype blade being built, all of the, well, not all, but you know, the majority of the engineers that [00:12:00] have designed it are more than likely gonna be at the factory.
Like there’s gonna be heavy control on QA, QEC, like that. Those blades are gonna be built probably the best that you can build them to the design spec, right? They’re not big time serial production, yada, yada, yada. When this thing sits and cooks for a year, two years, and depending on what kind of blade issues we may see out of it, that comes with a caveat, right?
And that caveat being that that is basically prototype blade production and it has a lot of QC QA QC methodologies to it. And when we get to the point where now we’re taking that and going to serial blade production. That brings in some difficulties, or not difficulties, but like different qa, qc methodologies, um, and control over the end product.
So I like to see that they’re get letting this thing cook. I know GE did that with their, their new quote unquote workhorse, 6.8 cypress or whatever it is. That’s fantastic. Um, but knowing that these are prototype [00:13:00] machines, when we get into serial production. It kind of rears its head, right? You don’t know what issues might pop up.
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Allen Hall: While conventional blade inspections requires shutting down the turbine. And that costs money. Danish Startup, Qualy Drone has demonstrated a different approach [00:14:00] at the.
Ruan to Wind Farm in Danish waters. Working with RDBE, stack Craft Total Energies and DTU. The company flew a drone equipped with thermal cameras and artificial intelligence to inspect blades while they were still spinning. Uh, this is a pretty revolutionary concept being put into action right now ’cause I think everybody has talked about.
Wouldn’t it be nice if we could keep the turbines running and, and get blade inspections done? Well, it looks like quality drone has done it. Uh, the system identifies surface defects and potential internal damage in real time and without any fiscal contact, of course, and without interrupting power generations.
So as the technology is described, the drone just sits there. Steady as the blades rotate around. Uh, the technology comes from the Aquatic GO Project, uh, funded by Denmark’s, EUDP program. RDBE has [00:15:00] confirmed plans to expand use of the technology and quality. Drone says it has commercial solutions ready for the market.
Now we have all have questions about this. I think Joel, the first time I heard about this was probably a year and a half ago, two years ago in Amsterdam at one of the Blade conferences. And I said at the time, no way, but they, they do have a, a lot of data that’s available online. I, I’ve downloaded it and it’s being the engineer and looked at some of the videos and images they have produced.
They from what is available and what I saw, there’s a couple of turbines at DTU, some smaller turbines. Have you ever been to Rust, Gilda and been to DTU? They have a couple of turbines on site, so what it looked like they were using one of these smaller turbines, megawatt or maybe smaller turbine. Uh, to do this, uh, trial on, but they had thermal movie images and standard, you know, video images from a drone.
They were using [00:16:00] DGI and Maverick drones. Uh, pretty standard stuff, but I think the key comes in and the artificial intelligence bit. As you sit there and watch these blades go around, you gotta figure out where you are and what blades you’re looking at and try to splice these images together that I guess, conceptually would work.
But there’s a lot of. Hurdles here still, right?
Joel Saxum: Yeah. You have to go, go back from data analysis and data capture and all this stuff just to the basics of the sensor technology. You immediately will run into some sensor problems. Sensor problems being, if you’re trying to capture an image or video with RGB as a turbine is moving.
There’s just like you, you want to have bright light, a huge sensor to be able to capture things with super fast shutter speed. And you need a global shutter versus a rolling shutter to avoid some more of that motion blur. So there’s like, you start stepping up big time in the cost of the sensors and you have to have a really good RGB camera.
And then you go to thermal. So now thermal to have to capture good [00:17:00]quality thermal images of a wind turbine blade, you need backwards conditions than that. You need cloudy day. You don’t want to have shine sheen bright sunlight because you’re changing the heat signature of the blade. You are getting, uh, reflectance, reflectance messes with thermal imagery, imaging sensors.
So the ideal conditions are if you can get out there first thing in the morning when the sun is just coming up, but the sun’s kind of covered by clouds, um, that’s where you want to be. But then you say you take a pic or image and you do this of the front side of the blade, and then you go down to the backside.
Now you have different conditions because there’s, it’s been. Shaded there, but the reason that you need to have the turbine in motion to have thermal data make sense is you need the friction, right? So you need a crack to sit there and kind of vibrate amongst itself and create a localized heat signature.
Otherwise, the thermal [00:18:00] imagery doesn’t. Give you what you want unless you’re under the perfect conditions. Or you might be able to see, you know, like balsa core versus foam core versus a different resin layup and those kind of things that absorb heat at different rates. So you, you, you really need some specialist specialist knowledge to be able to assess this data as well.
Allen Hall: Well, Yolanda, from the asset management side, how much money would you generate by keeping the turbines running versus turning them off for a standard? Drone inspection. What does that cost look like for a, an American wind farm, a hundred turbines, something like that. What is that costing in terms of power?
Yolanda Padron: I mean, these turbines are small, right? So it’s not a lot to just turn it off for a second and, and be able to inspect it, right? Especially if you’re getting high quality images. I think my issues, a lot of this, this sounds like a really great project. It’s just. A lot of the current drone [00:19:00] inspections, you have them go through an AI filter, but you still, to be able to get a good quality analysis, you have to get a person to go through it.
Right. And I think there’s a lot more people in the industry, and correct me if I’m wrong, that have been trained and can look through an external drone inspection and just look at the images and say, okay, this is what this is Then. People who are trained to look at the thermal imaging pictures and say, okay, this is a crack, or this is, you know, you have lightning damage or this broke right there.
Uh, so you’d have to get a lot more specialized people to be able to do that. You can’t just, I mean, I wouldn’t trust AI right now to to be the sole. Thing going through that data. So you also have to get some sort of drone inspection, external drone inspection to be able to, [00:20:00] to quantify what exactly is real and what’s not.
And then, you know, Joel, you alluded to it earlier, but you don’t have high quality images right now. Right? Because you have to do the thermal sensing. So if you’re. If you’re, if you don’t have the high quality images that you need to be able to go back, if, if, if you have an issue to send a team or to talk to your OE em or something, you, you’re missing out on a lot of information, so, so I think maybe it would be a good, right now as it stands, it would be a good, it, it’d be complimentary to doing the external drone inspections.
I don’t think that they could fully replace them. Now.
Joel Saxum: Yeah, I think like going to your AI comment like that makes absolute sense because I mean, we’ve been doing external drone inspections for what, since 2016 and Yeah. And, and implementing AI and think about the data sets that, that [00:21:00] AI is trained on and it still makes mistakes regularly and it doesn’t matter, you know, like what provider you use.
All of those things need a human in the loop. So think about the, the what exists for the data set of thermal imagery of blades. There isn’t one. And then you still have to have the therm, the human in the loop. And when we talk to like our, our buddy Jeremy Hanks over at C-I-C-N-D-T, when you start getting into NDT specialists, because that’s what this is, is a form of NDT thermal is when you start getting into specialist, specialist, specialist, specialist, they become more expensive, more specialized.
It’s harder to do. Like, I just don’t think, and if you do the math on this, it’s like. They did this project for two years and spent 2 million US dollars per year for like 4 million US dollars total. I don’t think that’s the best use of $4 million right now. Wind,
Allen Hall: it’s a drop in the bucket. I think in terms of what the spend is over in Europe to make technologies better.
Offshore wind is the first thought because it is expensive to turn off a 15 or 20 megawatt turbine. You don’t want to do that [00:22:00] and be, because there’s fewer turbines when you turn one off, it does matter all of a sudden in, in terms of the grid, uh, stability, you would think so you, you just a loss of revenue too.
You don’t want to shut that thing down. But I go, I go back. To what I remember from a year and a half ago, two years ago, about the thermal imaging and, and seeing some things early on. Yeah, it can kind of see inside the blade, which is interesting to me. The one thing I thought was really more valuable was you could actually see turbulence on the blade.
You can get a sense of how the blade is performing because you can in certain, uh, aspect angles and certain temp, certain temperature ranges. You can see where friction builds up via turbulence, and you can see where you have problems on the blade. But I, I, I think as we were learning about. Blade problems, aerodynamic problems, your losses are going to be in the realm of a percent, maybe 2%.
So do you even care at that point? It, it must just come down then to being able to [00:23:00] keep a 15 megawatt turbine running. Okay, great. Uh, but I still think they’re gonna have some issues with the technology. But back to your point, Joel, the camera has to be either super, uh, sensitive. With high shutter speeds and the, and the right kind of light, because the tiff speeds are so high on a tiff speed on an offshore turbine, what a V 2 36 is like 103 meters per second.
That’s about two hundred and twenty two hundred thirty miles per hour. You’re talking about a race car and trying to capture that requires a lot of camera power. I’m interested about what Quality Drone is doing. I went to that website. There’s not a lot of information there yet. Hopefully there will be a lot more because if the technology proves out, if they can actually pull this off where the turbines are running.
Uh, I don’t know if to stop ’em. I think they have a lot of customers [00:24:00]offshore immediately, but also onshore. Yeah, onshore. I think it’s, it’s doable
Joel Saxum: just because you can. I’m gonna play devil’s advocate on this one because on the commercial side, because it took forever for us to even get. Like it took 3, 4, 5, 6 years for us to get to the point where you’re having a hundred percent coverage of autonomous drones.
And that was only because they only need to shut a turbine down for 20 minutes now. Right. The speed’s up way up. Yeah. And, and now we’re, we’re trying to get internals and a lot of people won’t even do internals. I’ve been to turbines where the hatches haven’t been open on the blades since installation, and they’re 13 years, 14 years old.
Right. So trying to get people just to do freaking internals is difficult. And then if they do, they’re like, ah, 10% of the fleet. You know, you have very rare, or you know, a or an identified serial of defect where people actually do internal inspections regularly. Um, and then, so, and, and if you talk about advanced inspection techniques, advanced inspection techniques are great for specific problems.
That’s the only thing they’re being [00:25:00] accepted for right now. Like NDT on route bushing pullouts, right? They, that’s the only way that you can really get into those and understand them. So specific specialty inspection techniques are being used in certain ways, but it’s very, very, very limited. Um, and talk to anybody that does NDT around the wind industry and they’ll tell you that.
So this to me, being a, another kind of niche inspection technology that I don’t know if it’s has the quality that it is need to. To dismount the incumbent, I guess is what I’m trying to say.
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After five years of development, Alliant Energy is ready to build one of Wisconsin’s largest wind farms. The Columbia Wind Project in Columbia County would put more than 40 turbines across rural farmland generating about 270 megawatts of power for about 100,000 homes. The price tag is roughly $730 million for the project.
The more than 300 landowners have signed lease agreements already, and the company says these are next generation turbines. We’re not sure which ones yet, we’re gonna talk about that, that are taller and larger than older models. Uh, they’ll have to be, [00:27:00] uh, Alliant estimates the project will save customers about $450 million over the 35 years by avoiding volatile fuel costs and.
We’ll generate more than $100 million in local tax revenue. Now, Joel, I think everybody in Europe, when I talk to them ask me the the same thing. Is there anything happening onshore in the US for wind? And the answer is yes all the time. Onshore wind may not be as prolific as it was a a year or two ago, but there’s still a lot of new projects, big projects going to happen here.
Joel Saxum: Yeah. If you’ve been following the news here with Alliant Energy, and Alliant operates in that kind of Iowa, Minnesota, Wisconsin, Illinois, that upper. Part of the Midwest, if you have watched a or listened to Alliant in the news lately, they recently signed a letter of intent for one gigawatt worth of turbines from Nordex.[00:28:00]
And, uh, before the episode here, we’re doing a little digging to try to figure out what they’re gonna do with this wind farm. And if you start doing some math, you see 277 megawatts, only 40 turbines. Well, that means that they’ve gotta be big, right? We’re looking at six plus megawatt turbines here, and I did a little bit deeper digging, um, in the Wisconsin Public Service Commission’s paperwork.
Uh, the docket for this wind farm explicitly says they will be nordex turbines. So to me, that speaks to an N 1 63 possibly going up. Um, and that goes along too. Earlier in the episode we talked about should you use larger turbines and less of them. I think that that’s a way to appease local landowners.
That’s my opinion. I don’t know if that’s the, you know, landman style sales tactic they used publicly, but to only put 40 wind turbines out. Whereas in the past, a 280 megawatt wind farm would’ve been a hundred hundred, [00:29:00]20, 140 turbine farm. I think that’s a lot easier to swallow as a, as a, as a local public.
Right. But to what you said, Alan. Yeah, absolutely. When farms are going forward, this one’s gonna be in central Wisconsin, not too far from Wisconsin Dells, if you know where that is and, uh, you know, the, the math works out. Alliant is, uh, a hell of a developer. They’ve been doing a lot of big things for a lot of long, long time, and, uh, they’re moving into Wisconsin here on this one.
Allen Hall: What are gonna be some of the challenges, Yolanda being up in Wisconsin because it does get really cold and others. Icing systems that need to be a applied to these blades because of the cold and the snow. As Joel mentioned, there’s always like 4, 5, 6 meters of snow in Wisconsin during January, February.
That’s not an easy environment for a blade or or turbine to operate in.
Yolanda Padron: I think they definitely will. Um, I’m. Not as well versed as Rosie as [00:30:00] in the Canadian and colder region icing practices. But I mean, something that’s great for, for people in Wisconsin is, is Canada who has a lot of wind resources and they, I mean, a lot of the things have been tried, tested, and true, right?
So it’s not like it’s a, it’s a novel technology in a novel place necessarily because. On the cold side, you have things that have been a lot worse, really close, and you have on the warm side, I mean just in Texas, everything’s a lot warmer than there. Um, I think something that’s really exciting for the landowners and the just in general there.
I know sometimes there’s agreements that have, you know, you get a percentage of the earnings depending on like how many. Megawatts are generated on your land or something. So that will be so great for that community to be able [00:31:00] to, I mean, you have bigger turbines on your land, so you have probably a lot more money coming into the community than just to, to alliance.
So that’s, that’s a really exciting thing to hear.
Allen Hall: That wraps up another episode of the Uptime Wind Energy Podcast. If today’s discussion sparked any questions or ideas, we’d love to hear from you. Reach out to us on LinkedIn and don’t forget to subscribe so you never miss an episode. And if you found value in today’s discussion, please leave us a review.
It really helps other wind energy professionals discover the show For Rosie, Yolanda and Joel, I’m Allen Hall and we’ll see you next time on the Uptime Wind Energy Podcast.
Renewable Energy
EchoBolt’s BoltWave Makes Bolt Inspections Easy
Weather Guard Lightning Tech

EchoBolt’s BoltWave Makes Bolt Inspections Easy
Pete Andrews from EchoBolt joins to discuss ultrasonic bolt inspection, the Bolt Wave device, and blade stud defect detection.
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Welcome to Uptime Spotlight, shining light on wind. Energy’s brightest innovators. This is the Progress Powering tomorrow.
Pete Andrews: Pete, welcome to the program. Good to be back. Yeah. See you face to face. Yeah. Yes. This is wonderful. It’s a really great event to catch it with loads of the. UK innovation that are happening in the supply chain. So it’s, yeah, really nice to be here.
Allen Hall: This is really good to meet in person because we have seen a lot of bolt issues in the us, Canada, Australia, yeah.
Uh, all around the world and every time bolt problems come up, I say, have you called Pete Andrews and Echo Bolt and gotten the kit to detect bolt issues? And then who’s Pete? Give me Pete’s phone number. Okay, sure. Uh, but now that we’re here in person, a lot has changed since we first talked to you probably two years ago.[00:01:00]
You’re a bootstrap company based in the UK that has global presence, and I, I think it’s a good start to explain what the technology is and why Echo Bolt matters so much in today’s world.
Pete Andrews: Yeah, absolutely. So, um, as you said, we’re a uk, um, SME, there’s a team of 13 of us based here in the uk. Yeah. But we do deliver our services internationally, but really focused on Northern Europe.
Yeah. But increasingly we’ve done more in the US and North America, a little bit in Canada. Um, but our big offering really is to help wind turbine operators and owners reduce the need to routinely retire in bulks. So we have a quick and simple inspection technology that people can deploy, find out the status of their bolt connections, and then.
Reti them if necessary, but the vast majority of the time we find that they’re static and absolutely fine and can be left [00:02:00] alone. So it’s a real big efficiency boost for wind operators.
Joel Saxum: Well, you’re doing things by prescription now, right? Instead of just blanket cover, we’re gonna do all of this. It’s like, let’s work on the ones that actually need to be worked on.
Let’s do the, the work that we actually need to, and instead of lugging, like we’re looking at the kit right here, and I can, you can hold the case in one hand, let alone the tools in a couple of fingers. As opposed to torque tensioning tools that are this big, they weigh a hundred kilos, and those come with all of their own problems.
So I know that you guys said you’re, you’re focused here. You do a lot of work, um, in the offshore wind world as well. Yeah. I mean, offshore wind is where you add a zero right? To zeros. Yeah. Everything else is that much more complicated. It costs that much more. It’s you’re transitioning people offshore to the transition pieces.
Like there’s so much more HSE risk, dollar risk, all of these different spend things. So. The Echo Bolt systems, these different tools that you have being developed and utilized here first make absolute sense, but now you guys are starting to go to onshore as well.
Pete Andrews: Yeah, that’s right. So I mean, as as you said, that there’s really [00:03:00] three main benefit areas we focus on.
The first one is the health and safety of technicians, right? As you said, some of the fasteners used offshore now are up to MA hundred. So a hundred millimeter diameter bolts,
Joel Saxum: four inches for our American friends. Yeah, absolutely.
Pete Andrews: And they probably weigh. 30 kilos plus per bolt. Yeah. Um, so just the physical manual handling of that sort of equipment and the tightening equipment for those bolts is a huge risk for people.
If you think 150 bolts lifting or maneuvering, the tooling around on on its own can cause all the problems. So as well as the inherent risk of the hydraulic kit failing. So occasionally we see catastrophic tool failure. Is, which have really high potential severity, you know, sort of tensioner heads ejecting or crush injuries from Tor.
So that is really a key focus for our customers, just to [00:04:00] keep their teams safe, but also you have to be the cost effective and the the major cost benefit we allow is that we don’t have to revisit every bolt and every turbine like you’d have to do if you were retyping. So we believe there’s something of the order of a million pounds per installed gigawatt saving.
By moving from a routine REIT uh, maintenance strategy to a focused condition based inspection, you significantly reduce the amount of intervention you make and keep your turbines running more and reduce the boots on the ground on the turbine. So three real kind of, um, key. Benefits for people adopting our technology
Allen Hall: because we routinely see tower bolts being reworked or retention depending on who the manufacturer is.
And I’m watching this go on. I’m like, why are [00:05:00] we doing this? It seems, or the 10% rule, we’re tighten 10% this year, and they’ll come back and see how it’s going. That’s a little insane, right, because you’re just kind of. Tensioning bolts up to see if one of them has a problem and then you just do more of them and we’re wasting so much time because echo bolts figured this out years ago.
You don’t need to do that. You can tell what the tension is in a bolt ultrasonically, which was the original technology, the first gen I’ll call it, uh, that you could tell the length of the bolt. If the length of the bolt is correct within certain parameters, you know that it is tension properly. If it’s shrunk, that probably means it’s not tensioned properly.
That’s a huge advantage because you can’t physically see it. And I know I’ve seen technicians go, oh, I could take a hammer and I can tell you which ones are not tensioned properly wrong. Wrong. And I think that’s where equitable comes in because you’re actually applying a a lot of science simply [00:06:00] to a complex problem because the numbers are so big.
Pete Andrews: Yeah, I mean that, that, that’s been the real. Driving force between our offering is to simplify it. So ultimately we’re based on a non-destructive testing technique. It’s an ultrasonic thickness checking technique, but when from the non-destructive testing background, it’s crack detection, people have time, they can be, it’s a very precision measurement.
People have to be trained in the wind industry. We’re trying to inspect. A thousand, 2000 bolts a day at scale. It’s a completely different, um, ask of the technology and the way the technology has been developed historically has required too much technician expertise, too much configuration and set up time, and hasn’t delivered on the, on the speed that’s needed to be efficient in wind.
And that’s where our bolt wave [00:07:00] unit we’ve, that we’ve developed over the last. 18 months, let’s say, where all of our focus has gone to make it as slick and as easy for a client technician to pick up with minimal training. It’s through an iOS interface. Everyone understands it intuitively. Um, it’s a bit like using the camera app on your phone.
You know, you’re just hitting measure, measure, measure, measure, measure 10 seconds a bolt as you move the, um, ultrasonic transducer across, and then the data gets moved. Automatically to the cloud, to our bolt platform. And customers can view it in near real time. The engineer in the office can see the inspections happened.
They can see if there are any anomalous bolts, and then there can be communication there and then whether an intervention is necessary. So it’s sort of really changed the way our customers think about managing their, um. They’re bolted joints.
Joel Saxum: Well, I think these are, these are the kind of innovations that we love to see, right?
Because [00:08:00] we regularly talk about a shortage of technicians, and this isn’t, I was just learning this this week too, like this is not a wind problem. This is a everywhere problem. No matter what industry you’re in. Use are short of technicians. But we’re seeing like a tool like this is developed to be able to scale that workforce as well.
Right. You don’t need to be an NDT level three expert to go and do these things. ’cause there’s a very few of those people out there. Right? Right. We know the NDT people, a lot of NDT people, and that’s a hard skillset to come by. Yeah. This can be put in the hands of any technician. Yeah, a quick training course.
Just, Hey, this is how you use your iPhone. You can check Instagram, right? Yeah. Okay. You can off figure. Yeah, have fun. See you at lunch. Um, but they can, they can make this happen, right? They can go do these inspections and you’re getting that, that, uh, data collected in the field. Centralized back to an SME that’s looking at it and you don’t have to put that SME in the field and try to scale their ability to go and travel and do all these things.
They can be in the office making sure that the, the QA, QC is done correctly. I love it. I think that that’s the way we need to go with a lot of things. [00:09:00]Uh, and you’re making it happen.
Pete Andrews: Yeah. And it’s a real kind of. F change in mindset for us. So originally when we started Ebot, we were using third party hardware.
Yeah. Which required a bit of that specialism. Yeah. A bit of care about the setup of the project, getting multiple parameters configured before you got going. And it wasn’t really something we could put in the hands of a customer.
Joel Saxum: Yeah.
Pete Andrews: Which meant Ebot scale was limited to what our own team could go and do, and regionally as well.
You know, so we’re UK based. Probably 60% of our customers are uk, but now we have this Northern Europe offshore wind is obviously on our doorstep, but then increasingly we’ve done more and more in North America, so we’ve probably been to five or six sites now in North America and expect that to be a growth market because we can, we can now ship the devices over there, give some virtual training help.
Uh, [00:10:00] people set themselves up and then that opens up that market, you know, so it’s been a real change in strategy for us, but has allowed us to have far more impact than we otherwise would just try to be a pure service.
Allen Hall: Well, let’s talk about the big problem in the states of a minute, which are the root bushing or inserts that are loose in some blades.
When you lose that pushing, you also lose the tension on the bolt that can be measured. Is that something you’re getting involved with quite a bit now because of just trying to determine how many bolts are affected and, and where we are on the safety scale of can we run this turbine or not? Is that something that EE bolt’s been looking into?
Pete Andrews: Yeah, absolutely. So I, I’d say there’s sort of two halves of what we do. There’s the, there’s the bulk wholesale monitoring of. Typically static connections to eliminate this routine retitling where it’s not needed typically, typically. But then we have these edge cases of certain [00:11:00] connections and certain platforms that have known bolt integrity problems, and we are working with clients to really, um, manage those integrity risks.
Blade stud is an absolute classic, you know, sort of, I think almost every turbine OEM on some, if not all of their platforms has got. Embedded risk into their blades, pitch bearing connections. Um, so yeah, exactly as you said, our customers are using the technology for two things really. One is to ensure the bolts have been tightened to the preload that was specified or the target window.
And quite often we find there is an opportunity to increase the preload and therefore increase the resistance to fatigue failure. So. You know, particularly on older sites where the bolts perhaps not in the condition they were on day one. Well, they definitely won’t be. Um, when people have gone and retti them, they haven’t got back to where they, they should be.[00:12:00]
So we can prove that and increase a bit of that resilience, but then also start to look for the segments around the joint where, um, the bolt might start loosening or failures are occurring, and find areas where they can really hone in. And actively manage risk. And that sort of leads to what we’ve decided to do for the next year, particularly with Blade Stud in mind, is evolve this technology.
So whilst it’s also measuring the elongation, we will do a defect scan at the same time. So you’ll monitor your blade stu, um, connection and we’re hoping that we can set the device to flag to you there and then. We believe this bulk has got a defect while you’re here, get it changed out before it fails and, and all the knock on problems, um, from there.
Joel Saxum: So what you’re just pointing to there is a, is a workflow, right? So to me that is typical [00:13:00] of some of the amazing, innovative companies in the UK that I’ve run into throughout my career. And that is, you’re a group of SMEs, you know, bolted connections. That’s what you do, right? But then you’re like, hey. If there’s a tool, we could make a tool that would make our lives a bit easier, then it’s like, well, we could make the entire industry’s lives a little bit easier as well.
So let’s iterate on that. And now you’re able to send these kits around the world to look at these things. Hey, you have a problem with this specific model. We can help you with this because we know the failure mode and we know how to look for it. Let’s do that for you. Also here, you’re doing bolt bulk measurements.
We got that for you. But it all kind of flows back to the fact that Echo Bolt is a team. A bolted connection, SMEs that are making tools and being able to also provide consulting if need be. Yeah. Right. Um, to, to an entire industry. And I think that, um, this is my take on it, right? Wind is stop number one. I think you guys are gonna do a fantastic year, but there’s a lot of, uh, opportunity out there in bolted [00:14:00] connections as well.
Allen Hall: A tremendous amount blade bolts being broken from defects in the crystalline structure. What appears to be a more. Rapidly developing issue across fleets that I’ve seen. I went to a farm this summer and the number of blade bolts that were there on the table that were broken on the conference room table was And the whiteboard office.
Yeah. Yeah. This one,
Joel Saxum: this one.
Allen Hall: Your hard head is not gonna protect you from this one. It’s, it’s, it was this, um, I couldn’t imagine the amount of time they were spending hunting these things down. And of course, the only way they were finding ’em was they were broken. You like to catch ’em before they break because it becomes
Joel Saxum: a safety risk.
Just not too long ago we saw an insurance case where there’s an RCA going on and it is pointing at an entire tower came down. Right. And it is pointing at a mid, mid tower section bolted connection. How often do you guys run into those problems? Or are you contacted by insurance companies or anything like that to, to take a peek at those?
Pete Andrews: We haven’t done anything directly for insurance [00:15:00]companies, but we have been engaged by. Engineering consultancies that are doing RCA type activities. Okay. Um, things like at the end of defect liability periods mm-hmm. A customer has, has seen, they’ve had a lot of, uh, issues from an OEM, maybe an OE EM has offered a modification or an upgrade, assessing whether that upgrade is actually solved the problem or not.
We’ve got involved in, um, but the tower. Issue specifically. It’s actually very rare we find, um, problems with tower connections, but where we do is often where they haven’t achieved good flange flatness, ah, during installation or the bolts have been, let’s say, left out in the elements for a period and lubrication has been, has deteriorated before the bolt’s been installed.
So there are cases out there, but what I would say is. [00:16:00] To think about your whole life cycle, so ensure the bolt’s installed correctly and we can help with that with a QA to say, yes, this torque or tightening method has got you to the load that you want. Do some through life monitoring, but often if you install it correctly, it will it’s operational life.
You will have very little concern. But then in the UK market, we’re increasingly getting involved again at the end of life, right? Life extension where life extension turbines are 20, 25 years old. How does an operator make a decision to carry on running without replacing all bots? Um, and that’s where increasingly we being asked to use the technologist just to say, actually the joint is fine.
The bolts have run in a good, um, operational envelope. Run them on. Don’t replace a hundred percent of them like you might have been recommended to from your, um, yeah. Turbine supplier side. [00:17:00]
Allen Hall: So Pete, if someone’s doing a repower where they’re basically putting a new one in the cell on an existing tower, they’re making a lot of assumptions about all the bolts from the ground up that they’re gonna be okay.
And I know we’re talking about that. We’re in a lot of installations where. If the turbine has gone through a repowered or two. So now those bolts are 20 years old. Yeah. And trying to get ’em to
Joel Saxum: 30 35. 35
Allen Hall: 40. Yeah. I don’t know what they’re doing. By those bolted connections. Are they just like replacing the bolts?
Are they hitting ’em with a hammer again? Is that the, yeah,
Pete Andrews: I mean, they might replace ’em, but you’ve got a problem with the foundation bolts. ’cause they’re obviously often anchor bolts set into concrete, so you have to reuse them and. With the projects, both in wind and in process power industry with the chimney stacks to try and ascertain whether foundation bolts that are set into concrete are still suitable for operations.
So look for corrosion losses, look for [00:18:00] defects. Um, so yeah, they’re all things that need thinking about before you just make the snap decision to repower. But I think
Joel Saxum: a lot of that, uh, going back to a couple minutes ago, you were talking about at the commissioning phase, making sure that you have proper qa, QC of how these things were installed day one, and then making sure that before commissioning of a turbine, they’re checked.
I think that’s really important. We’re starting to see that in the blade world now too, where we’ve been talking about it for a long time, and now when you talk to operators, they’re like, we’re getting inspections done on the blades before they’re hung. Or at the factory before they’re hung. After they’re hung.
Like they want a good foundation baseline. Are you seeing that in the bolted connection world too?
Pete Andrews: Yes. Sort of. It’s just emerging for us. What we’ve found is, so most of our customers are in the operational phase ’cause they are the ones feeling the pain. Yeah. Of the routine retitling work. When they do major components, they sometimes engage us to come and say, can you check [00:19:00] before and after the blade was removed?
What was it? Before we took it off from a a bolt load perspective, what is it afterwards? Can you then recheck after 500 hours When we retalk it? And what we’ve seen there often is the initial install hasn’t got them to where they needed to be and they’ve had to go and do the break in maintenance or the 500 hour REIT to get the bolts to the right load.
So one of the questions that we have is whether. Some of the defects are actually being initiated very early on in that initial running in period and whether if, if actually you’d taken the time at, at the point of assembly to make sure you were correct, whether that avoids some of the knock on integrity concerns.
So yeah, it’s interesting area.
Allen Hall: Well, bolts are what hold wind turbines together and you better know you have the right. Tension and [00:20:00] torque on your bolts to get to the lifetime of the wind turbine and to, and to check it once in a while. And I know there’s a lot of operators I can think of right now in the United States that are sort of doing that job somewhat.
I I think they have missed out on opportunities to save a lot of money and to call it echo bolt. How do people get ahold of you? Because that’s one thing I run into all the time. Like, Hey, hey, you gotta talk to Ebol, call Ebol. How do they get ahold of you?
Pete Andrews: So the easiest ways are via our website. Which is echo bolt.com.
Um, LinkedIn, you’ll find us at Echo Bolt on LinkedIn. Reach out. Our email would be info@cobolt.com. So any of those route and you’ll, uh, reach me and the team and more than happy to speak to you about any of your faulting concerns or problems. We are, uh, yeah, we’re passionate about your problems.
Allen Hall: Pete, thank you so much for being on this podcast.
I, it is great to actually see you in person and see the bolt wave technology. It’s really [00:21:00] impressive. So anybody out there that needs bolt tensioning to checking tools, you need to get ahold of Pete at Echo Bolt and get started today. Thank you Pete. Thanks guys. It’s great to be here.
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