Faulty 600W Sterling Power Quasi Sine Wave Inverter

Faulty 600W Sterling Power Quasi Sine Wave Inverter | Can I FIX it?

Рет қаралды 38,524

6 ай бұрын

Hello! In this video we're going to be looking at a faulty 600W Sterling Power Quasi Sine Wave Inverter. Was it a bargain? or Was it a bust? Come and join me as I try and repair it, and we'll find out together!
I'm not an expert, but I do enjoy trying to fix things.
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Other cameras: Canon G7X, iPhone 6
Microscopes: Amscope trinocular (clone) with FHD 48MP Camera V8
& Adonstar AD409 Pro.
Editing Software: DaVinci Resolve
#electronics #electronicsrepair #repair
Faulty 12V inverter repair
12V Inverter repair
Repairing a 12V inverter
Sterling power inverter repair
fixing an inverter
how to repair an inverter
repairing and inverter
how to fix a faulty inverter

Пікірлер: 191

@andygardiner6526 6 ай бұрын

I love the waveform - "quasi sine wave" meaning the typical "not at all sine wave like" :-)

@BuyitFixit 6 ай бұрын

😂😂😂😂👍

@DanielBulyovcsity 6 ай бұрын

-Mom, can we have sine wave at home? -We have sine wave at home. The sine wave at home:

@vk3hau 6 ай бұрын

but I want a Square wave....😂

@jamesneale8853 6 ай бұрын

One of the worse sine waves I've ever seen

@hpd385tannoylover2 6 ай бұрын

"quasi" in this case meaning clipping?

@machooke4846 6 ай бұрын

I really appreciate the addition of the text commentary, like when you put the extra info about "looking for usually 0.4-0.75" when checking transistors.

@BuyitFixit 6 ай бұрын

Thanks, it also helps fill in the gaps where I forget to speak as I'm thinking. It's sometimes hard to work stuff out in your head while trying not to have loads of just silence 🙂👍

@grumpychris 3 ай бұрын

The sign of a true professional; while unpacking the inverter - "oh look there's the manual" immediately slings it aside :)

@BuyitFixit 3 ай бұрын

😂😂😂😂👍

@shaunmorrissey7313 6 ай бұрын

When it said "quasi" sine wave it wasn't joking was it?😀 nice fix

@BuyitFixit 6 ай бұрын

Thanks Shaun 👍

@robertbox5399 3 ай бұрын

Sine wave with flat bits. No inductors in that thing for filtering whatsoever!

@scottyc7220 4 ай бұрын

Many years ago in the early 90's, I worked as an engineer in the marine industry. I've seen many Stirling products, mostly battery chargers with a very high failure rate. I had conversations with Charles Stirling (founder), He always denied his products were reponsible for boiling batteries his chargers were connected to. In the end, we had a policy of no longer installing Stirling.

@BuyitFixit 4 ай бұрын

Interesting story, thanks for sharing 👍🙂

@christophermarshall5765 6 ай бұрын

Square wave inverter. Nice fix.

@BuyitFixit 6 ай бұрын

Thanks 👍

@jonathaningram4672 6 ай бұрын

Always inspired to find and fix stuff. I have an app on phone called Olio, a lady was giving away a 32 inch Samsung TV, it would eventually come on but there was a loud crackling clicking noise as it tried. Thought I'd have a go at it, carrying it home it wasn't light lol. Did a bit of research and seems 1000uf 10v surface mounted electrolytic caps fail under the shield by the processor chip on main board. They're the squat one's not the tall ones, tricky to spot a partially bloated one, the heat shield gave it away, crusty dark grey circle. I actually ripped a trace removing one but fixed it with a strand of solder wick lol. So for a couple of quid for the caps I've got a free TV but the input ports on the back are ideal for a large monitor and that's what I'm using it for. Yes you are right if 1 mosfet blew especially with a power supply should replace all, survivors took a kicking.

@BuyitFixit 6 ай бұрын

Thanks 👍and nice one on the TV 🙂

@thetraindriver01 6 ай бұрын

Nice work on the TV 👍😊

@kevinroberts781 6 ай бұрын

Thank you for your hard work! You are a master at electronics. I have been playing with electronics for 30 years and im still no where near your level of mastery. I watch every video you put out and I always learn something. Even if it's just patience. Thank you!

@BuyitFixit 6 ай бұрын

Thanks Kevin 👍I wouldn't say a master, just persistence and a bit of luck perhaps 😂😂There is still a lot of stuff I don't know and I'm sure there are a lot more cleverer people out there than me 🙂

@KorAllRBare 6 ай бұрын

I don't how critical it is for switch mode power supplies for the MosFet's to be a matched set or not, but if it is, then when this power supply Fails I would highly recommend you order 10 matched sets of MosFets from the same manufactured batch, and once you get them you match them to each other using ideally a component checker or Multimeter, in short if they don't match well one will worker harder than the other ergo once it goes the other goes quite quickly after it, if you have a Thermal Camera you can actually detect how much more one is operating if the match isn't sufficient, yup I learned the hard way..

@BuyitFixit 6 ай бұрын

Interesting, thanks for the advice 👍

@delberttannen3403 6 ай бұрын

I finished the exact same repair on the exact same inverter, earlier this week, apart from it was the other two MOSFETs that had failed on mine 😀. As someone else has mentioned, the original fuses are 3x30A.

@BuyitFixit 6 ай бұрын

Nice work👍and thanks for letting me know. I was just being cautious with the fuses, I usually find a large piece of copper wire or a bent nail might be a little too much 😂😂😂

@Ragnar8504 3 ай бұрын

That's surprisingly large! I'd have guessed 20 A considering fuses usually have a fairly generous time/current trip curve (i.e. you can overload them quite considerably for a surprisingly long time). Assuming nominal values were used for the design I'd say 600 W/12 V = 50 A, so even 3x20 would be more than that. A guesstimated fusing current of 1.5 would mean the fuses would in theory supply up to 900 W for up to an hour with a single 50 A fuse (or two 25), i.e. 3x20 A would be plenty for 600 W continuous.

@terrym1065 6 ай бұрын

Bargain! Whether you keep it or sell it, that was a good repair. Quasi sine wave🤨 Always enjoy watching these trouble shooting, diagnosis and repairs. Smart stuff sir.

@BuyitFixit 6 ай бұрын

Thanks 👍

@einfelder8262 6 ай бұрын

Quasi sine wave = not sine wave.......

@mrplod1616 6 ай бұрын

Usually 30a fuses in these. Sterling power inverters used to be made in Taiwan by Genius Power. Maplin inverters were from the same source and a lot cheaper than the Sterling badged one's. A good bit of kit. I used to sell them, under a different name again!

@BuyitFixit 6 ай бұрын

Thanks for the info! Yes I did think it looked well made 👍

@sixtyfiveford 6 ай бұрын

Thanks for giving an overall description of how everything works.

@BuyitFixit 6 ай бұрын

Glad it was helpful!👍

@3dsmaxrocks699 6 ай бұрын

Another awesome video 👍 Made my crappy week SOOOO much better! THANKS YOU!

@BuyitFixit 6 ай бұрын

Thanks 👍Glad you enjoyed it!

@jdmccorful 6 ай бұрын

Gave it life! Nice work.

@BuyitFixit 6 ай бұрын

Yes! Thank you!

@mikecass8306 6 ай бұрын

Brilliant repair as always, thanks Mick 😀

@BuyitFixit 6 ай бұрын

Thanks Mike 👍

@remog38 3 ай бұрын

May have been said before it might be an idea to prechar ge an inverter to stop the capacitors drawing large amount of current and rogering something , thanks for all the videos all excellent and ineresting .

@BuyitFixit 3 ай бұрын

Thanks 👍

@drorhaz 6 ай бұрын

Great video as always! You are the best. ❤

@BuyitFixit 6 ай бұрын

Thanks 😊👍

@wisher21uk 6 ай бұрын

Lovely job Mick I always love your methodical fault finding and no doubt you get the right results 😊

@BuyitFixit 6 ай бұрын

Cheers Gary 👍

@jakeandrus690 4 ай бұрын

You've earned a new subscriber, excellent repair!🍺🍺

@BuyitFixit 4 ай бұрын

Thanks and welcome. I've actually done some pretty crazy repairs on things, and also some reverse engineering! Check out the FLIR thermal camera video, or the AverMedia device I looked at a few videos back. I've also looked at a medical ultrasound scanner which I made run doom too 🙂

@dodgydruid 6 ай бұрын

Sitting here watching as I do some strap stuff then cleaning parts of my Xbox One I got for £4 prior to installing a new 1540 motherboard and dvd board. I do like the soft tones of the Geordie accent, I spent a week up there around 2008 meeting up with my old World of Warcraft guild and what an awesome time it was esp in the pub outside the Metro where I collected a ton of bird's phone numbers as they jus' adored my south London wide boy accent hehehehe

@BuyitFixit 6 ай бұрын

Thanks 👍Glad you like the accent 🙂

@reklaw3603 5 ай бұрын

Nice easy fix for you. Well done!

@BuyitFixit 5 ай бұрын

Thanks 👍

@thetraindriver01 6 ай бұрын

Really good video, I liked the 3 shots of the job, oscilloscope and the thermal camera. It was a nice touch to prove everything at once 👍😊 it can cater for everyone's level of understanding and seeing the waveform they mention, thanks for the extra effort 👍 looking forward to the next one 😊

@BuyitFixit 6 ай бұрын

Thanks mate 👍

@brianwood5220 6 ай бұрын

Nice job, thanks for sharing.

@BuyitFixit 6 ай бұрын

Thanks Brian 👍

@FishingFrustrationsUK 4 ай бұрын

saved to electronics list for when i get my mofes and start looking at my inverter thanks for the info

@BuyitFixit 4 ай бұрын

Glad to help 👍

@paulwalker427 6 ай бұрын

great video as always

@BuyitFixit 6 ай бұрын

Thanks Paul 👍

@jsd8981 2 ай бұрын

God that takes me back a bit, we got one for one of our sons, guess who played it the most Yep I hang my head in shame it was me, evertime I could get the chance I was on it, loved that game...glad you brought it back to life...cheers bud...

@BuyitFixit 2 ай бұрын

I'm not sure if you commented on the right video as I've not played inverter before 😂

@599miata 6 ай бұрын

That was a great repair mate. Those inverters can be wicked to repair sometimes. 👍👍

@BuyitFixit 6 ай бұрын

Thanks mate👍

@suryavanshib 5 ай бұрын

Awesome 😎😎😎 you are doing great 🤩🤩🤩

@BuyitFixit 5 ай бұрын

Thank you so much 😀

@bones1225 6 ай бұрын

About time that somebody on Utube does a “ physical visual inspection”for newbies, on mosfets and the like”. Whack on continuity and let the beeps be your “eyes.” No technical knowledge needed, ……If you hear a beep between any two points, on the component,regardless of the way the probes are, the mosfets, Bjt’s or transistors are snookered. Nice one boss. All of a sudden, the technical data pales to grey. Ps, this is one of the primary beeping things to check after power cables, switches and buttons , (after the initial power adapter.test). 90 percent of board fixing completed. Next , test diodes ,resistors, fuses and capacitors for a short to ground and then 7 years of technical theory, comes down to a probable 95 percent fix of a board with a couple of beeps.

@BuyitFixit 6 ай бұрын

Thanks Bones 👍 Much appreciated 🙂

@Jesselovespinball 6 ай бұрын

Nice work 👍

@BuyitFixit 6 ай бұрын

Thank you 👍

@lmwlmw4468 6 ай бұрын

Nice work.

@BuyitFixit 6 ай бұрын

Thanks!

@fredwooding599 6 ай бұрын

Broken Square wave if at all. Great video anyway. Thank you I learned a better way to diagnose Mosfets now too.

@BuyitFixit 6 ай бұрын

Thanks Fred👍Glad it was helpful 🙂

@juanitoseme8632 6 ай бұрын

Good job

@BuyitFixit 6 ай бұрын

Thanks 👍

@Reaktanzkreis 22 күн бұрын

The output is totally isolated. So you can earth one leg of the socket to define an neutral for safe operation with an ELCB/ RCD.

@marcyd2007 6 ай бұрын

Another nice find and fix. All bought and sorted for what? a tenner? Nice 🙂

@BuyitFixit 6 ай бұрын

Thanks Marc 👍Yes about £10 🙂

@t1d100 6 ай бұрын

Thanks for your efforts to share and teach. Please remember to always drain and verify zero on the main/big/high-voltage caps, before working on the unit. We want you to stick around. Just a friendly reminder. On switch-mode converters, such as this, I always replace the main caps. They seem to be one of the typical failure points. If the main caps were getting weak, could that contribute to the poor shape of the output waveform?

@BuyitFixit 6 ай бұрын

Thanks for the advice. I'm not sure about the output waveform. It could have been because of the load. It seemed perfect with the near maximum load on it.

@t1d100 6 ай бұрын

@@BuyitFixit Yep, that cooker thing probably had a lot of inductance. I'm guessing, here.

@BuyitFixit 6 ай бұрын

Resistance dropping the voltage I would think.

@SiaVids 5 ай бұрын

Over the years I have repaired many of Stirlings products, some of them have been very good quality (like the pure sinewave ones made by Rich Electric in Taiwan). There have also been some that have been overpriced tat with questionable safety issues.

@BuyitFixit 5 ай бұрын

Interesting, Thanks for letting me know 👍

@andymouse 6 ай бұрын

Awesome repair (of course) but that's not what I call a Sinewave ! but any port in a storm....cheers.

@BuyitFixit 6 ай бұрын

Thanks Andymouse 👍

@Mymatevince 5 ай бұрын

Liked seeing the output on the scope (what a messy waveform😂) and the explanation of how the device works, really helpful. Are you happy with that Hantek scope, would you buy it again now that you have used it for a while? Also would a device like that with a near square wave output damage AC equipment do you think? Cheers Mick for another great video.

@BuyitFixit 5 ай бұрын

Thanks Vince 👍Yes overall I'm happy with the scope. It's sometimes a little slow refreshing (compared to an analogue scope) but it does have the advantage of being able to capture a waveform and let you zoom in and also save stills to USB. I perhaps should have got the Rigol scope instead. The only reason is that it does protocol decoding so it shows bytes of data on things like serial or I2C which is something that I would personally find useful. On the inverter, it does say that it won't work on some AC equipment. I think it would depend on the device. For instance most power supplies take the AC, then rectify it to DC, and smooth it with a capacitor before doing anything so that would probably be OK, but something like an AC motor might struggle with it.

@Mymatevince 5 ай бұрын

@@BuyitFixit Cheers Mick 👍

@r4nd0mstuf 3 ай бұрын

What brand solder wick do you use? Even with tonnes of flux, a hotter iron and fresh solder I struggle to get the solder to absorb into the wick like yours. Really enjoying your content, keep up the great videos 👍

@BuyitFixit 3 ай бұрын

It should be in the video description of my last few videos along with other tools as I seemed to be getting asked this a lot. Thanks for the support 👍

@FishingFrustrationsUK 4 ай бұрын

just ordered some k4145 mosfets for my 1500 watt inverter that blew up

@BuyitFixit 4 ай бұрын

Nice, hopefully it goes well. I'd check the diodes etc around the area just to be sure.

@ryanallen3704 6 ай бұрын

Wayyy to brave with that hoover over the mat 😂😂😂

@BuyitFixit 5 ай бұрын

😂😂😂😂

@ryanallen3704 5 ай бұрын

@@BuyitFixit my spelling there was terrible 🤦🤣👀

@georgeholme612 6 ай бұрын

Really good to watch a professional at work

@BuyitFixit 6 ай бұрын

I wish I knew one 😂😂😂😂👍

@nzhillbilly6468 6 ай бұрын

hi was that a modified sine inverter going by the waveform, excellent repair

@BuyitFixit 6 ай бұрын

Thanks 👍

@spikester 6 ай бұрын

lol fuhjyyu, those caps were part of the capacitor plague back in the day.

@simontay4851 6 ай бұрын

They still are to this day. I call them fuhkyyu's.

@BuyitFixit 6 ай бұрын

Thanks, I didn't know that 👍

@Reaktanzkreis 22 күн бұрын

Aldi incendiary device...☺

@BuyitFixit 22 күн бұрын

😂😂😂

@truthprophesy 3 ай бұрын

I'm new here, maybe u can add FLIR camera to check temperature on pcb

@BuyitFixit 3 ай бұрын

Hey, welcome aboard. I've got a thermal camera, in fact I actually repaired a FLIR on the channel, although I'm not that keen on them as a company, if you get a chance check out the video and you'll see why!

@ottospoelstra2481 6 ай бұрын

You can also test the capacitors using a ESR meter👍

@thetraindriver01 6 ай бұрын

I think that using the fluke on capacitance range gave enough info on the capacitors to prove function. You would really need to remove them from the board to get accurate information about the esr values and it wasn't necessary in this case to prove if they were working or not. He has a multifunction meter that he has used in older videos that can measure esr but these did not look blown and read very close to the stated values when tested, it's more about fixing the item than removing everything and testing each component 😊👍 hope that helps you understand why he did not use an esr test this time around.

@ottospoelstra2481 6 ай бұрын

@@thetraindriver01 I understand that he is using the fluke for capacitance measurements. But with an esr or lcr measurement you can also read the internal resistance thats also very important when doing capacitors. 1 thing is for sure the way he tackles the problem and finf the solution is great.👍

@thetraindriver01 6 ай бұрын

@ottospoelstra2481 I agree with what you are saying, I do. But there is no point in using a bazooka to kill a fly, smallest effort needed to prove it works first, it showed the cap was OK to a point when just going over the caps. A strange reading would have certainly prompted a more in depth look with a machine that could test esr and as most would do, change the cap as they are inexpensive and one of the main components prone to failure all on their own through age or cycling👍😊

@charlespilkington8170 6 ай бұрын

Play pretty much move the decimal point over to on all that electronic stuff

@Franklinveterinarycenter1of4 7 күн бұрын

Fine job! Do you believe the THD on that inverter is safe enough for sensitive electronics. No heavy loads like the 500 watt cake cooker. Perhaps used to plug low wattage computers, phone chargers, small LED Tv?

@BuyitFixit 7 күн бұрын

Thanks, I'm not too sure on that one. Some devices might work OK, but I'm sure some wouldn't like it's output.

@jimsvideos7201 6 ай бұрын

One hour, two FETs and three fuses well spent.

@BuyitFixit 6 ай бұрын

Thanks Jim 👍

@steveweeks5128 6 ай бұрын

Hi mate,I tried what you said to repair inverter but still nothing, could I send to you to have a look,powers up,12v side but no 240v output,don't mind paying for repair,only in dh4 postcode,thanks very much Steve,ps love the channel

@BuyitFixit 6 ай бұрын

Hi Steve, I used to live in DH6. I'm a fair distance from there now. Drop me an email it's the channel name at out look dot com

@stevehopwood6392 6 ай бұрын

hi what has cused the short and why have the rest not shorted ?

@BuyitFixit 6 ай бұрын

Mosfets can just fail, or it could have been caused by a short circuit on the output. Hard to tell. Once the first lot failed short circuit, the fuses would have blown and prevented further damage.

@jamesneale8853 6 ай бұрын

Have you got a po box? I have a few sets of brand new test leads you can have for nowt

@BuyitFixit 6 ай бұрын

Feel free to drop me an email. It's the channel name at out look dot com. 👍

@kalin666 6 ай бұрын

Milwaukee Hoover . . . . 😅 and your car is a Kia Volvo? Allow me to clean this mess with some Bounty Brawn paper towels . . . and clean my dishes with some Dawn Cascade . . . . 🤣

@BuyitFixit 6 ай бұрын

Yes, I know when I said it although you're the first to mention. We just call them hoovers although it's not been an actual hoover for years 😂😂

@kalin666 6 ай бұрын

@@BuyitFixit in some parts of the US we call all face tissues Kleenex, but we wouldn't combine brand names like "Puffs Kleenex"

@BuyitFixit 6 ай бұрын

In the uk, most people hoover up, or hoover the carpet. Or at least that's what they say around these parts of the UK.

@1998eclipse1998 6 ай бұрын

2 mosfets run one leg of the 240 and the other 2 run the other leg.

@OuyaWoelders-hi9bn 6 ай бұрын

I have a 2kw sine wave inverter that has a isolated power supply daughter board on it that has failed.

@BuyitFixit 6 ай бұрын

I did look at a 2kw one a while back, however it was just fuses that had blown due to it being connected up wrong.

@ralphj4012 6 ай бұрын

Well done, another save from landfill. That sign wave is a stretch of the imagination and I was surprised that the input FETs had no heatsink. I wonder whether that cupcake maker is suitable for Yorkshire puds.

@BuyitFixit 6 ай бұрын

Thanks Ralph 👍the case is just one large heatsink. I'm not so sure on Yorkshire puds, it probably wouldn't get hot enough 🙂

@maicod 6 ай бұрын

you waited for the caps to discharge right ? could you have shorted them out if in a hurry ?

@BuyitFixit 6 ай бұрын

True, but I had other things to tend to anyway 🙂

@maicod 6 ай бұрын

@@BuyitFixit that's a fair reason :)

@robertbox5399 3 ай бұрын

Conformal coat (in this case, only on the shiny HV bit) is awful stuff for repairs.

@BuyitFixit 3 ай бұрын

Yes agree, I've had a few nightmares with it especially in a few of the Milwaukee tools.

@phillipchen7749 6 ай бұрын

Based on the wave form on your oscilloscope it is a modified square wave and not a sine wave.

@BuyitFixit 6 ай бұрын

Marketing at it's best 😂😂😂

@codebeat4192 6 ай бұрын

The main question is: "Why did it blow up?" There must be a reason. Maybe the specs are underrated or operating close to limits what it can handle. Simply replacing it can result in the same error after a while, this is not a solution. The maximum gate voltage of the IRF80 is pretty low, only 20v max. It is possible there are spikes that exceeds this voltage (probably at startup or shutdown) and damage the mosfet after a while. I think I had searched for a better alternative replacement.

@BuyitFixit 6 ай бұрын

Sometimes components just fail. I repaired a few CRT TVs back in the day where line output transistors would fail, just replacing them and they were good again.

@torfinnsrnes6232 17 күн бұрын

Milwaukee Hoover. 😂 joint venture company.

@BuyitFixit 17 күн бұрын

Yes 😂😂We call "vacuums" "Hoovers" over here, we say say things like "I'm going to hoover up" even though it's probably a Dyson or Shark or something. I think it's a UK thing. Like the US calls solder soder lol.

@torfinnsrnes6232 17 күн бұрын

@@BuyitFixit I knew that. in Norway we call them støvsuger, which is litterally dust sucker.😀

@senffabrik4903 4 ай бұрын

quasi = look alike but look closer isnt at all. :D LOL

@BuyitFixit 4 ай бұрын

😂😂😂👍

@nichtdrumrum 6 ай бұрын

Fan checked? Didn't move on power up at 26:29.

@BuyitFixit 6 ай бұрын

Only moves once is has a load. It was going when I had the cup cake maker on it.

@smbrob 6 ай бұрын

Can I fix it, the cupcake version. 😂

@BuyitFixit 6 ай бұрын

😂😂😂😂

@wherami 6 ай бұрын

No matter what that’s worth the price lol

@BuyitFixit 6 ай бұрын

Yes, probably for the parts alone. I've now got to find a use for it 😂😂😂

@occamraiser 4 ай бұрын

When did 600W inverters cost hundreds of pounds? Even a Pure Sinewave one would be less than 200, and more than 600W at that. Amazon does a nice looking one with good reviews for £85

@BuyitFixit 4 ай бұрын

I think this 600W retails for around £110 (perhaps something to do with the brand?) although I paid just over £5 for it.

@thejackaroo4WDcampingchannel Ай бұрын

That is like saying I'll just drive my Volvo Ford, it's a vacuum cleaner not a Hoover

@BuyitFixit Ай бұрын

People over here say they are going to hoover up, do the hoovering or hoover the kitchen for instance, even though the machine they are using is not an actual hoover. Perhaps it's a regional thing.

@oefzdegoeggl 6 ай бұрын

"Quasi sine wave"? Wtf? That's rather a "quasi almost perfect square" 😄

@BuyitFixit 6 ай бұрын

Yes 😂😂😂😂😂

@henrikmejlgaard2088 6 ай бұрын

Farting at 17:07? 😃

@BuyitFixit 6 ай бұрын

😂😂😂Creaky chair. I really need to have a look at it, it creaks every time I move on the bloody thing.

@HDXFH 6 ай бұрын

Lmao it sounded like it 😂

@lexpee 6 ай бұрын

Hmmm modified Sine Wave Inverter. i have bad experiences, equipment that malfunctions. Pure sine wave inverter costs double but is much better.

@BuyitFixit 6 ай бұрын

Yes, not the best but probably ok for a cupcake maker 😂😂😂😂👍

@lexpee 6 ай бұрын

I don't like cupcakes

@BuyitFixit 6 ай бұрын

@@lexpee 😂😂😂😂

@simontay4851 6 ай бұрын

Yes, modified sine wave is ok for a resistive load such as a cupcake heater.

@lexpee 6 ай бұрын

electric machines, tools work also good with modified sine wave. not sensitive electronics. I use for almost 20 years an Victron pure sine wave inverter dutch quality that is one off the best.

@simontay4851 6 ай бұрын

eugh! fuhkyyu capacitors. Change them immediately. Im surprised they're not leaking or bulging on the top. They are probably what caused the MOSFETS to fail.

@BuyitFixit 6 ай бұрын

Thanks Simon 👍I just noticed your other comment 🙂

@simontay4851 6 ай бұрын

Or the previous owner overloaded it. IRF840s are only 8A. You could replace them with 15N50, which are 500V 15A.