I bought the Cheapest Inverter on eBay part 2/2

[@z1power]

knurlgnar is back... Finally something good to come out of 2020!

[@jakeharrison2128]

Now with added girth

[@sharik_rahat]

Wow, you still have those salvaged batteries...

[@lanceguilin]

OMG! Knurlgnar! You're still alive! I was so afraid you'd passed onto the next dimension! Glad to see you're alive and kicking!!!! Hope you're doing well buddy! Stay safe!

[@terrylawrence6772]

Really happy to see you back on you tube. Thanks for coming back !!!

[@rolliebca]

Wonderful to see part 2 appear so quickly. I found it entertaining and informative. Pleasant surprise to have it perform so well. Looking forward to your next videos. Cheers.

[@JohnSmith-qd8po]

"No smoky smoke, that's a good start". Flipping the power switch on for the first time on anything new nowadays is an apprehensive experience.

[@knurlgnar24]

And at 48V input exploding FETs are more like a firecracker than the pop you get at 12V. The arc flash from 48V is starting to get into 'it will hurt you' territory! Not PPE range, but getting there.

[@garbleduser]

@@knurlgnar24 When I was doing torcher testing on an Aims 1.5kw spwm pure sine inverter using a refrigerated centrifuge as load, I encountered that popping. The cause turned out to be GATE RESISTORS! The gate resistors were under rated, frying and popping all the mosfet in the boost stage. This mainly happened when the inverter was cold, lowering the RDS of the mosfets. I wound up replacing the mosfets and gate resistors, with MUCH more powerful items. Recalibrating the load capabilities was more difficult. ..

[@MikinessAnalog]

@@knurlgnar24 Isn't 48 volts getting into the actual average "welding" voltage (yes I know it requires the amps as well)

[@MegaBaker123]

Couldn't possibly agree more

[@tekdragon]

Wow, seeing a new video from you is an awesome blast from the past!! Your channel, in large part, was the inspiration for me to dive into my 12 volt DC hobby and eventually led to me building a small homebrew off-grid solar system and everything. I learned so much from you and your vids are always entertaining. You had the most badass battery bank/box I ever saw LOL. Anyways, thank you and welcome back man.

[@knurlgnar24]

It sounds like you made it further than me! I have long wanted to do an off-grid solar system in my house but the laws are such that it's almost impossible to do it nowadays. Technically this stuff is easy, legally it's a nightmare. So long as I am just doing projects things are OK but if I do something that can be considered a 'permanent install' then I'm in trouble!

[@tekdragon]

@@knurlgnar24 I really appreciate you replying! well my system wasn't running the house or anything, just mostly my tech stuff like radios, laptop, some network gear, tablets/phones, etc. it WAS off-grid in the sense that it was completely independent from the grid though lol. had about 300 watts in solar panels on a stand in the backyard and about 200Ah of battery capacity. i'm guessing you'd need permits and stuff to do a homebrew whole home system. that would make for some epic content for you though, just saying :D

[@pierremaltais6465]

@@knurlgnar24 do you know a good charger to charge nicd pocket plate battery i ve search everywhere and found nothing (something affordable if possible)

[@MStrickkk]

@@knurlgnar24 Laws prohibit me from doing a DIY home solar project too. However... Laws don't prevent me from installing a solar system onto a box trailer with all the electronics and batteries inside, and running a shore power cord into a generator input on my house. :)

[@LastExile1989]

Same

[@uxwbill]

I am both of surprised and impressed that this inverter worked as well as it did. I do hope you might come back to KZbin on a somewhat more regular basis.

[@ChrisEdwardsRestoration]

Thank you for returning to making videos !!! your knowledge is invaluable and you inspire many please keep making these !!thank you!!!

[@rogerthat2538]

I CAN'T BELIEVE YOUR BACK!!!! i love your old content. I learned a lot about inverters from you. Thanks, you're awesome.

[@knurlgnar24]

Thanks for the comment CP and thanks for sticking around all these years!

[@PuchMaxi]

Thanks for sharing Knurlgnar and welcome back!

[@spagamoto]

This would be a great add-on to those 48V electric ride-on mowers! Would be handy around the property.

[@knurlgnar24]

Interesting idea!

[@pjshots]

Part 2, oh yeah. Nice one, good to see more stuff.

[@nickush7512]

Man, you are a brute !! .... we haven't broken it yet, it is performing well above what was expected, so lets try harder !! It makes me grimmice and it makes me smile at the same time :) I am also very grateful for the high quality information that your brutality extracts..... great humour, so many of the questions arrising answered before they are even asked... Always a pleasure: many thanks and all good things your way dude.

[@ekimviewmaster5010]

Great video. Facts, semi-scientific tests, real world tests, video showing the guts and the explanation of components was super to see/learn. Thank You

[@nixxonnor]

Welcome back, knurlgar24. Good to see you are back. We have all missed you a lot.

[@johnmcgiv1]

Very thorough video very well done thank you very much for your time.

[@knurlgnar24]

Thanks for watching! Glad it was useful to you.

[@johnbell1859]

That’s a great work shop,a little sort out and your back in business nice to see you back. 🇬🇧

[@jiexilaoshi]

Thanks for making another inverter review! Got any repair videos coming? I always enjoy your diagnosis of broken inverters. Btw, I always recommend your video to friends who want to learn about battery banks and inverters, you have so much experience. Glad you are making more videos.

[@volvo09]

I'm impressed with that thing, I really didn't think it would power that dehumidifier!! Not bad for a MSW on the cheap.

[@franchisefred4066]

I bet it would’ve not lasted 15 minutes until it overloaded 😂

[@chadhauze1683]

Welcome back! Great videos as usual. I’ve been trying to find one of those meters with the scope since I first saw yours years ago. So far no luck....

[@knurlgnar24]

Yes, they are hard to find even 20 years after I purchased this one. Crazy isn't it that they aren't widely available? It'd be so easy with today's technology. They should be $50 a pop and with higher BW than mine.

[@imark7777777]

It's been awhile not much has changed, I think this was one of the first channels I've subscribed to nice to see something new.

[@nomadeenvr2233]

Great to see you comeback on KZbin! Thank a lot.

[@LarryL619]

I’m so glad to see you back with a new video!

[@aspendell209]

Awesome! Glad your back. I learned a lot from your earlier inverter videos. In fact I would have to say you had the best obscure inverter testing and analysis channel on the web. I have missed having you as a resource the last couple years to analyze new (affordable) tech that is becoming available. One suggestion: Try your efficiency test without the charger connected. The extra 8 or 10 volts which that produces on the input DC could conceivably skew the results if they are somehow clipping everything over the rated voltage of 48v. Similar to 120v appliances which are designed to run on anything over 90 Vac, the higher you increase the voltage, the lower the appliances efficiency will be. ~Cheers

[@knurlgnar24]

Input voltage definitely could affect the efficiency. I have a really old video where I did this with a xantrex 1500W inverter.

[@mindshelfpro]

Can you test the pure sine wave inverter now please? Thanks! And great to have you back on YT!

[@jamest.5001]

I'm glad you are at it again, or somewhat at it anyway, I hope you will consider doing a monthly video atleats, I have went back and watched nearly every video!

[@josephjohnson6626]

Welcome back, you were missed!

[@davida1hiwaaynet]

Very nice inverter, especially at that price! I'm surprised it was able to start the dehumidifier compressor as those have a really stout reactive power startup demand. Also; I'm so happy to see you sharing videos again! I've thoroughly enjoyed your previous videos, and hoped that life would present you with some new video-worthy experiences to share!

[@knurlgnar24]

I've had so many video ideas over the years... Most of them boring crap but, hey, I guess that's my specialty!

[@paherbst524]

i truly appreciate your videos. i'm happy to see new content from you.

[@johnk1325]

Great to see you back after so long. Always loved your videos 👍

[@knurlgnar24]

Thank you so much 😀

[@Z71GALLA]

So happy to see you doing videos again!!!

[@MiamiWebDesign]

Great to see you back and great review. That’s a very nice inverter for the money. Thanks.

[@kevinroberts781]

Glad to see you making videos again!!!! You are the one that got me started in my battery hobby!! Look forward to seeing more from you!

[@CHARLES12STRING]

welcome back , I was so glad to see the new content , I let the videos play in the side screen with low volume to let the add revenue add up after watching the video :)

[@ernstkliveman8476]

And here I thought I just wasn't getting your posts...good to see ya.

[@jonathandooling702]

Awesome are you back? Long time since your last video.

[@electromechanicalstuff2602]

His last video was 3 days ago

[@jonathandooling702]

@@electromechanicalstuff2602 go look 5 years now👀

[@electromechanicalstuff2602]

@@jonathandooling702 then it was a few months then 5 yrs. I was being mostly sarcastic tho

[@Ian-pe9rj]

Glad to see you back!

[@DennisWintjes2]

Welcome back. I missed your videos!! Woot! Woot! Would love your opinion on some current pure sine inverters

[@thonatim5321]

knurlgnar24: Thanks for coming back. We missed you. I hope everything is okay with you and your family.

[@electromechanicalstuff2602]

Basement use to be just framed. Looks like rooms now 👍

[@knurlgnar24]

And before that it was just poured concrete with no insulation! :)

[@gd2329j]

Good seeing you again & thanks for the videos . I'm thinking the long extension helped limit the serge current when starting the big inductive loads . Distractions welcome in 2020 !

[@knurlgnar24]

I hadn't thought about that angle - that long extension cords may actually help the surge capability by not tripping the overload limit... It was a combination 12AWG and 14AWG setup and about 50ft if I had to guess so it shouldn't have contributed too much vs a standard 16AWG cord I don't think.

[@GarryS-j8s]

i know its an old video - but thanks for taking your time to make it, that is one very impressive inverter you have there for the price point of view.. crazy

[@nickaustin1424]

I am glad you are back!

[@forrestgore6874]

Nice video. How do you feel about the modified vs pure sine wave for running a space heater?

[@knurlgnar24]

I recommend a modified sine inverter for dedicated linear loads like space heaters. They are less expensive, more reliable, more efficient, and overall simpler devices with less to go wrong. That said if you have any inclination at all to potentially use that inverter for other purposes now or in the future you might want to consider a pure sine inverter just for the flexibility it offers should your situation or needs unexpectedly change.

[@forrestgore6874]

Thank you again. Do you by chance know If simple heating pads or heating mats (for starting seedlings) are linear loads? They have no motors.

[@btrapr]

Im so glad to that your back and I look forward to watching your videos. thnx!

[@egn83b]

Thanks for the inverter review. Very impressive review. Nice to see those old batteries still working.

[@gor4988]

That was (not surprisingly) a very thorough test Great value for $200, Chinese stuff has come a long way Look forward to more of your great vids

[@uncontrollabledogs3791]

Nice real-world testing here. And great video as always🎉

[@AQUATICSLIVE]

Good job man. Got to compliment your vids you go through quite a bit of testing in these. Above and beyond as usual for you.

[@MrClipper500]

He`s Back!!!. Great video. And I use to think all inverters out of China were junk. Keep the videos coming.

[@brendanwood1540]

Resistor is like slowly opening, or closing, a water valve to avoid water hammer AKA volts. Or electric force.

[@gr1f1th]

LOL the Dehumidifier is still kicking huh? Glad to see you back dude! I'd love if you could cover some over/under voltage disabling on interverts as none of these are being built to handle any other chemistry other than Lead acid or LifePo4 voltages.

[@knurlgnar24]

I did have to recharge the dehumidifier as it started freezing up, but yup, still kicking. The newer ones don't work as well for this sort of testing. The overvoltage protection is probably best to not mess with as the boost stage of the inverter runs at a fixed ratio. They usually PWM them to avoid excessive no-load consumption but still the overvoltage protection is there to protect that portion of the inverter. As far as undervoltage protection that kind of has the same problem where the fixed ratio ends up being too low to make a good waveform. Many 'true sine' inverters spit out a square wave under max load and low battery voltage already for this reason. I agree, would be nice to have other voltage ranges available!

[@gr1f1th]

@@knurlgnar24 Cool. I figured there was a pretty significant reason. You're videos have been really helpful so thank you. I know how much effort is needed to make them.

[@squack90]

Glad your back!!!

[@mazdalorean]

Always enjoy your testing and explanations. Thanks for the show. Joe

[@ericknoll3278]

great to see you back awesome video like always hope you have time to do some more

[@ScottDLR]

I appreciate the vid. For a cheapo, I'm impressed with its performance. I wouldn't use a MSW for anything with a motor though. Their motors tend to run hot and fail early if you do it very much.

[@matthewmoore54]

I always enjoy your very informative videos, Glad to see you back! Could you test the 12 volt version? Take care and God bless you and your family!

[@rpbajb]

Enjoyable video, as always.

[@matthewfish6113]

Thank you, you do excellent videos.

[@PVflying]

Hi! Have you any thoughts on how I can synchronise the outputs of two cheap single phase inverters so they are two phases of a 3 phase supply? I want to run my ground source heat pump, which needs three phase (but will run on two phases of a 3 phase supply, but won’t run single phase). Both inverters (Mensela IT-1) have a separate control board which generates the sine wave to drive the high power section of the inverter. I wonder if I can somehow drive both output stages from one control board with a phase shift inserted for the second inverter?

[@JT-lq4yd]

Sweet! Was waiting for part 2. Since this review is done, how about that Cotek unit there?

[@knurlgnar24]

You're right, I should make a video on it. I actually have that 4kw model and a 2kw (I think?) model of 48V Cotek so I can compare them to the older style Coteks (which are better unfortunately). Thanks for the suggestion.

[@howardescoffery4950]

All I was thinking the power of a 48v inverter be interesting to match it up with the 12v and 24v models and see how they do, I went 48v a few month ago and will never go back to a 12v system again you see the difference right away even with less batteries I am getting longer work time off the system.

[@knurlgnar24]

Hmm, that's not a bad idea. e.g. for this inverter I could purchase the exact same unit but the 12V model and see how it compares... Maybe if I ever get two otherwise identical units where only the input voltage is different!

[@Joemama555]

9:45 the in-rush current of a cold, resistive, heating heater will be well above 1500 watts for a 1500 watt heater i bet. so it will spike well above 3500 watts total

[@jamesscott1932]

Sounds like me, “I just popped my breaker!”

[@scroobyx7790]

Very interesting test, do you think you may test the 12v model? I will keep an eye out for that. Thank you

[@southpole560]

Hell yeah! I was always wondering when you would make another video again!

[@xavierneckor8918]

Thank you for a great video. Glad to see you back! I see you still have a Cotek inverter. How's it running? Big fan of your inverter videos. It would be great if you could do a video on what to look (e.g. internal design elements) for in a good reliable inverter. I would like know which inverters actually have working short circuit protection.

[@knurlgnar24]

Thanks Xavier! I may make more videos in the future but for now I have other obligations. The newer Cotek inverter I have is a decent product. I do like their old ones better and would get one of those if you can find it.

[@draggonfly14]

I've watched several of your old UPS modification videos and really liked them. very little content like yours on youtube. Very happy to see you back! im actually looking for a cheap way to get something similar, but pure sine wave, be it via converting a UPS or straight up buying a unit. Hope you can review more units like these! (Hopefully pure sine next) Also would suggest trying out LiFePo4 Batteries. just got myself a set and they are waaaay better than Lead acid, especially for High current loads. Was wondering if it is safe to plus two UPS to the same battery bank (like, will the charge circuits destroy each other or is it safe) Thanks again!

[@knurlgnar24]

It is safe to use two UPSs on the same battery bank. I have quite a few inverters and videos I could do videos on if I get the motivation.. Thanks for the comment/support. Incendentally I recently purchased a 14kwh LiFePO4 battery bank (parts) from Aliexpress to do a video series on. Not sure if they'll ever come as the delivery date on these things are months out and vendor cancellations are almost a given if prices rise. Nothing but shady stuff over there and nothing reasonably priced is available from reputable manufacturers. yet. I have a two part video series on Lithium vs lead acid you may be interested in if you haven't seen it.

[@draggonfly14]

@@knurlgnar24 Thank you very much for the reply! i was Specifically worried if there was "decoupling" of the ac and dc components on the UPS Charging circuits, as in, if UPS 1 is plugged into phase 1 and UPS 2 is plugged into Phase 2, will they blow each other up through the "charge circuit" i also just received and installed 20 100Ah liitokala lifepo4 cells in a 8s2P configuration and a 4s1P configuration. so far, I've had good success drawing over 75% of their capacity, with very low voltage sag. my other lead acid depp cycle interstate batteries have died within 2 years, one battery has a shorted cell :( and these never gave me even 50% of the capacity. Your video has definitely motivated me to resume my electrical projects! Thank you very much for being an inspiration!

[@captainyak3948]

Welcome back! Could you explain that spark that damages the terminals and how to get rid of it? Thanks.

[@knurlgnar24]

Nothing special going on with the spark, it's just a matter of short duration high amperage causing a very hot spark. The heat from the spark plasma vaporizes some metal. Spark plugs and relays etc are specially designed to resist ablation but most other devices are not. AC is pretty kind to contacts such as in household light switches but DC can be pretty brutal due to the arc not extinguishing every cycle. DC relays sometimes use cadmium or some similar special contact material to help prolong life. In terms of how to get rid of it, just connect it through a resistance to charge the input caps and then hard connect it. Most any resistor of any value will do. Or a light bulb, pretty much anything with an ohm or more of resistance.

[@captainyak3948]

@@knurlgnar24 Thank you for taking the time to explain thoroughly...

[@fc436]

for efficiencynyou cant use inductive loads because you cant know the W but the VA. except for pure resistive load that VA and W is the same

[@battery_solar_ev]

welcome back dude

[@Joemama555]

the printed waveform on the case of the inverter is actually very accurate to the waveform recorded by the potato-vision oscilloscope you had hooked up.. truth in advertising i guess.

[@KentHenry8]

Reminds me of my basement battery \ UPS pile-up room

[@knurlgnar24]

It's a good room for the soul, isn't it?

[@putraadriansyah8082]

Hello knurlgnar, can you do a video about the EGS002 pure sine wave inverter module? maybe you're interested using the module :D

[@forthrightnight]

Breaking news: knurlgnar gives rave review on cheapest inverter on eBay. "It isn't all that unrespectable." Nice surprise getting the new videos buddy. Cheers from B.C.

[@ChatGPT1111]

Since you already had a circuit breaker in line, why not hook it up with the breaker open and then close the breaker AFTER you hook up the battery?

[@knurlgnar24]

You're the second one to mention it. I didn't do that because... 'cause shut up! :)

[@superbaron01]

Man glad your back!

[@MrCtx32]

About time!! So glad your back and hopefully you'll stay. Will you need doing more testing like you use to do?

[@andriusst]

I like your videos not because of presentation but because information and knowledge you share. Don't worry about the video and audio quality. It is adequate for what you do.

[@scruff7559]

Welcome back.

[@thomasdipaolo2349]

Good stuff. Question, any experience with diagnosing battery management system (bms) on lithium battery?

[@AWIRE_onpc]

What this inverter pulled off is pretty impressive. Theres another brand you should check out, its called edecoa. They make pure and modified sine wave inverters and they ship the remote with it. *cough* gopower *cough* and I am curios what it can run.

[@knurlgnar24]

I've seen that brand advertised and have had significant skepticism about it. But that means nothing until they are disassembled, inspected, and tested. Thanks for the recommendation.

[@AWIRE_onpc]

@@knurlgnar24 Bestek also recently released their own line of 1000w and 2000w Pure sine wave inverters

[@simonmasters3295]

Good practical load testing! I have the same philosophy or design ethos as you. But at 20 minutes in I'm asking is it a 12v or 48v inverter? 1. Cheap inverters and modified sine work, equally expensive inverters require expensive protection 2. Most off grid does not require synchronised 50 or 60 Hz I have a number of 12v inverters running simultaneously and I am planing on adding one of those capacitive jump starters on the leads to the inverters in order to assist with DC voltage drop under inductive AC load conditions.

[@knurlgnar24]

I agree, sometimes a cheap inverter is the right tool for the job. A lightning strike, theft, or other disaster is less of an issue plus you don't have to spend as much on security/protection. And many appliances don't really care about waveform. For adding capacitance to the input leads to help with inductive I would suggest being very careful to calculate out the internal resistance of the pack, and how much current it can realistically put out for 500ms (a realistic minimum required for useful surge capability) before the voltage drops more than a volt or two due to cap discharge. I suspect you'll find that better cabling and/or adding another ordinary battery will improve performance more. A good battery has an internal resistance of low single digit milliohms.

[@ajw6715]

How does these modified sine wave inverters work with motors?

[@anthonyvolkman2338]

I really like that inverter now, I may get one!!

[@knurlgnar24]

It was definitely a pleasant surprise for me! With low cost inverters you just never know.

[@anthonyregina938]

You really know your sh@t didn’t realize how much you knew about all this! Awesome video. Thanks a lot. Made me feel stupid, lol. Great 2nd video

[@wscottald]

I think your videos are great. Just down to earth evaluations simple testing, but also great explanations. I have a question if you don't mind. This is all theoretical but let's say I have a 48v battery bank connected to a 3kw inverter for use when grid power goes out. I also have a 1kw 12v solar array connected to 2 1kw grid tie inverters for assisting grid power. The grid tie inverters are disabled when grid power goes off, but will the grid tie inverters come back online when the 3kw inverter is connected to house wiring to power the house? I know there's a lot of detail I didn't include, but just wondering if grid tie inverters would supplement the 3kw inverter to create a 5kw solution with the additional 2 1kw inverters.

[@knurlgnar24]

That's a really good question and one that I haven't though of previously. That could be a major problem as an inverter attempting to backfeed into another inverter will result in major problems - potentially damaging the 3kw inverter since it cannot accept power, only provide it. The short answer is that I would make sure those grid tie inverters don't power up on inverter power, but that's a very interesting question and I don't know exactly what would happen.

[@ytSuns26]

Oh it will work, will it be around six months from now!

[@knurlgnar24]

Hard to say without doing a LOT of in depth work with a scope and reverse engineering. Inverters like this in my experience tend to fail without warning at the strangest times - likely some corner case that wasn't considered in its design phase. My subjective opinion is that you'd have at least as good of luck with this one as most any other similar unit out there.

[@lezbriddon]

i bought a cheap and cheerful 3kw as i wanted to pull 2kw max, it didnt.. they replaced it when it let the smoke out, 2nd one lasted a day... reason for the first, fan didnt work... for the 2nd, the had been some cost cutting on the mosfets, they were the right part number, 30n50, but the part number isnt a clue to the max wattage of the mosfet... the cheaper ones they used had like half the max wattage of the other manufacture wrote on the pcb. so they refunded, i rebuilt it.....

[@knurlgnar24]

One reason I always open these products before powering on is to look for manufacturing issues. Frequently I'll find loose wires/connections, fragments of conductive material rattling around, and most commonly of all improperly heatsinked components such as overtightened fastener clamps that will result in smoke and failure under stress. I assume it worked after you rebuilt it properly?

[@scottwillow332]

Pure sinewave inverters are MORE efficient than a modified sinewave. I purchased a Victron Energy 5kva with built in 120 amp charger. Can even use my old copper cored arc welder with no issues. Cleaner and just as strong as grid power.

[@knurlgnar24]

I have a pure sine inverter that is approx 97% efficient. That doesn't mean in general pure sine inverters are more efficient than modified square wave units. The difference between the two is that 'pure sine' inverters switch their output H bridge much faster (more losses) and filter the output through some sort of choke (more losses). All else being equal it will be less efficient. That said 'all else' is rarely equal.

[@brycejcox]

If you were actually using the air compressors tho they would kick off once pressure was built 125-150 psi. As you use up your compressed air the pressure switch closes somewhere around 95-105 psi. Starting the compressor at this point, with roughly 100 psi already in the tank requires far more of a spike of juice to get it going. With that being said, I’m truly impressed it handled even that static loads as well as it did, especially with the long extension cord.

[@knurlgnar24]

I didn't show it but they both had around 100psi in them. The larger one is a 225psi unit but it has a universal motor in it so it's a little different than a typical air compressor.

[@brycejcox]

@@knurlgnar24 that’s pretty damn impressive! Thanks for letting us know.

[@knurlgnar24]

@@brycejcox I also wasn't clear about it in the video, but when the little one failed to start that wasn't the inverter's fault. That compressor starts hard and the extension cord wasn't helping.

[@brycejcox]

@@knurlgnar24 well most folks with a basic understanding of the subject will realize compressors will draw a surge at startup regardless. I’m assuming that’s exactly why you used them for an example load. With that being said, I do think it would be worth it to show the pressure gauge in future videos as that def is a major factor in the converters surge ability. When you read the manual and it said the unit could go over 100% for 20 seconds I was thinking to myself more like 2 tenths of a second but that’s exactly why so many of us enjoy these types of videos, because you’re demonstrating exactly what can be expected of these units!

[@brycejcox]

And i doubt you are but just in case you happen to be anywhere close to Southern Indiana/Louisville KY area I actually have several electronic loads capable of up to 400 volts / 100 amps / 3000 kw. Constant voltage / current / and capacitance modes!

[@worskaas]

now to double up the inverter, like with the double 410W inverters

[@knurlgnar24]

That might be interesting, but in the case of this inverter the method I used in that video wouldn't be very applicable as the balance between the input and output stages are well balanced in this particular unit.

[@seantivenan9593]

excellent review and really helpful Thank you 👍👍😊

[@holgermessner851]

Very good practical test. I did buy a 3600 watt 12volt to 120 volt on Ebay for $184. Called Vevor 3600. I hoped that I could put it in my truck to work on my house with some power tools. Compared with your video I am now hoping that it does exactly that. Thank you for your expertise.

[@knurlgnar24]

I hope it works well for you as you never know with these low cost inverters. I see that it lists a 16V overvoltage cutout which is excellent for your application. Many inverters turn off at 15V or less which can be a problem for vehicle powered applications.

[@holgermessner851]

@@knurlgnar24 I just installed it and it worked out of the box. Put my 800watt B&D driller on it and the display showed a 😃 when I did power it up. So far I am happy. I did not use the remote display because it is only connected with a USB cable. No place to put it in the truck. In the box were gauge 8 cable 450-750 volt, but only 1 foot long. Useless.

[@electromechanicalstuff2602]

Y not let the breaker charge the caps? Next time

[@gravelydon7072]

That is how I do them. The breaker can act as a switch safely as long as you don't do something stupid. Like hook the voltage up backwards to the inverter.

[@brynnond.6952]

13:27 Good thing I had one of those power meters because my little 500 btu air conditioner would short cycle and the compressor wouldn’t have enough torque to restart and would pull 18 amps at 1900 watts which is crazy

[@mwilliamshs]

1900 watts/18 amps=105 volts There's your problem

[@rme0108]

could you connect two of those in parallel like you did with the 410 watt ones way back?

[@knurlgnar24]

Yes, but it wouldn't work as well. At higher power levels like this 3kw inverter there wouldn't be much gain with that method.

[@paherbst524]

i'd be interested in a similar review of the cheapest pure sine wave inverter.

[@knurlgnar24]

Cheap but not the absolute cheapest, I purchased a 4000W WZRELB inverter. If it works out I should be able to post a review video of that one in the next couple of months.

[@jean-baptistemackenson5630]

Can you please share the model of current meter you are using ?

[@knurlgnar24]

The current clamp meter is an Extech MS2108A. When I purchased it it was one of the least expensive meters that had the features I wanted in a non no-name brand. I wouldn't recommend it today based on my experience with it because there are likely better options out there a decade later.