BOLTR: Samlex inverter | Cheap vs. Expensive

[@AmateurRedneckWorkshop]

I already got assaulted and assimilated and now you want me to get inverted. The demands of youtube are too much.

[@ScottandTera]

howdy Harold

[@225Perfect]

And my guitar gently weeps. Lol

[@timberwolf0122]

resistance

[@picobyte]

Actually both are crappy. Just get a proper sinewave inverter. That will run any shitty load.

[@zwerko]

Once they invert you over the bench you will be asstimulated.

[@elcheapo5302]

967k subscribers! That's 1.265M Canadian! Congrats, Uncle Bumble.

[@georgemccurdy4683]

I keep a sharing so's you can get that there plaque what'n KZbin gives ya if'n ya reach the bigger numbers. You can hang that in the outhouse, A.

[@fixt100]

We will show up at HQ loaded for bear and carrying hockey sticks.

[@johnsalmons9222]

@@KD0LRG ..Indeed by far your best export, protect him!

[@Lorddow12]

Dude did you take down your video on ethanol in fuel? It's one of your best videos in my opinion! I've opened many peoples eyes with it. I had some more enlightening to do today but when I went look for your master piece I cant find er. WTF man.

[@blarnzy]

1.35 million today. Thanks Trued'oh!

[@nshattock]

As a power electronics engineer: Look at the cheapness of the board, its a single sided and looks like FR1 or FR2. To minimise current loop area it should be double sided. No one uses these modified sine wave inverters for professional applications, just get a pure sine wave one and lose a bit of your power density and efficiency (you will save it in power losses in your motor!). There are some large motor drives that use a modified sine wave but they are designed for specific motors and applications. It's OK to parallel up MOSFETs as they have a negative temperature coefficient resistance so are unlikely to cascade fail. Using different types in parallel is never a good idea though as the worse ones will not conduct and just add to the switching time. Diodes have a positive temperature coefficient and shouldn't be parallelled unless they are on the same heatsink, and cut from the same die preferably. I can send you a DIY high quality sine wave inverter to test if you want to see what a good one looks like. PS. To get useful readings from your fft you have to exactly one cycle displayed on the screen (that's 20mS total for 50hz, good luck with 60hz). Then look only at the amplitude at each harmonic and ignore the rest.

[@nshattock]

@@pleaseelaborate3163I'm guessing you mean converter topology. I've tried using both high frequency (20khz) and low frequency (50hz) transformers to step up the voltage and low frequency is the way to go unless you need to make it lightweight. Output filter topology is whatever passives happened to be lying on the floor during testing

[@zmandubs]

This guy inverts

[@theginganinjaofficial]

@@zmandubs inverted af

[@Refthoom]

So what are the basics of a DIY pure sine inverter? H-bridge and back to front transformer? Do you need to regulate input wrt output or is that automagically adjusted by the load's power demand?

[@ToneGallis]

I thought you should never wipe back to front.

[@joaago1]

I have a mechanical engineering degree with a 3.7 average. When I watch your videos I feel so dumb, but yet so eager to learn more about material science! I'm so happy that I found your channel, it is awesome! Thank You! :) Much love from Norway!

[@cigr]

Sadly we've reached the point where many "name brand" items aren't really better than the cheaper alternatives. They're more expensive without putting that cost into quality.

[@jawms]

I believe that is the end goal of capitalism and publicly traded companies. Constant profit numbers until you run out of demand and plateau. Then the only solution is to increase margins.

[@burtosis]

What do you mean? The shareholder quality of life is much higher.

[@ProctorSilex]

@@jawms Capitalism has no end goal like what you wrote. It is the free market of production and purchasing. The market currently promotes cheaply produced crap at various extremes of mark up. Unfortunately, it would take a lot of us consumers demanding higher quality at the same price by not buying the junk at any price point to get the companies to up their game. Execs and shareholders will take less profits over no profits.

[@Canuckcrisis]

Darn Tough socks are as great as ever. You can't beat the LIFE TIME GUARANTEE.

[@lelandclayton5462]

Sad thing is a lot of name brands are using 3rd party products but with a custom casing and name branding.

[@RambozoClown]

Have a look in the executive parking lot of the two companies, you will probably see where your extra money went.

[@m33turmak3r]

Your videos got this C-Student through undergraduate Electrical Engineering without losing my mind. Learned the hard way "a bunch of angry pixies" is not an acceptable answer on EE exams. Congrats on 1M!

[@DjJMOProductions]

From Lawrence of Arabia, to Soylent Green, that was one outstanding literary jump. I applaud you.

[@hammer1212]

If he could have managed to wedge in Omega man for the tri fecta.!

[@timberwolf0122]

To reduce cornea searing from sparks on my 3KW pure sine inverter wired up a 5w 110v bulb and used it to limit the current before initial connection. Bonus is you can also use it to discharge the unit if-un you want to open her up and dilly with the innards

[@stuartd9741]

Dilly dilly

[@ElectroBOOM]

Maybe the beef is in the software? Try to short their output and see how they behave

[@jasonjones6077]

Hi boom. Heading to your channel next, I promise.

[@iancarnel8609]

Teaching people how to let the smoke out. :)

[@ejrupp9555]

Facepalm ... the Intellectual na'palm err um, Smoke ... as a result of the skid marks left by high density pixies after dey been triggered, thus requiring safe space, and soft-ware ... way too excit'd & offended wit the hard--ware.

[@Crimson.S.57]

OneTwoPlay Witty I’m learning towards the electrical engineers possible explanation.

[@theepicslayer7sss101]

maybe, but not every one is measured in "Giga Ohms" like you so they do not dare! ;P but i really thought the same, that little extra board is probably the only reason... or they cherry picked all the +/-% at there best tolerances!

[@markc2643]

Every video I watch of AvE reminds me of the stuff I've done in the past. I once used a 150W amp with a signal generator to create a power supply for a 4" 400Hz muffin fan that ran at 20k rippums. It had a very pure sine wave output.

[@edkelly364]

Buddy, I feal I should be paying you for the refresher. I went to tech school over forty years ago for electronics and you are a brilliant son of a gun. The basics in school helped me all my life as an electrician. I love your video's . You are also very funny. Thank you !

I have a new conspiracy theory. Just let it eat your mind. AvE has a long term marketing contract with the green mat manufacturer.

[@georgemccurdy4683]

😂 You ain't dog whistling.

[@waiakalulu3501]

Crushed Buna-N O-rings!!!

[@machinist7230]

That... makes a horrifying amount of sense.🤔

[@texasdeeslinglead2401]

Shmoo and pixie smoke , I tell yu

[@freebirthfreddy]

This comment wins

[@BravoCharleses]

Uncle Bumblefuck, please consider a vid or short series on home solar power from a technical perspective; the basics of the equipment and procedures that make it work, not burn the house down, and not bleed juice back into the power company's lines when they think they're de-energized.

[@marcroy8575]

I SECOND THIS!

[@DamonJohnCollins]

3rd

[@theginganinjaofficial]

5th.... er ah, 4th. Can't count

[@iamajailbreaker]

+1

[@midashaltzern]

Agree!

[@UniCrafter]

The internals of the $600 one remind me a lot of an amplifier, usually with car amps roughly half the PCB is an inverter to bring it up to 50 or something volts before going into the amplifier section. Switching class D amps are super efficient, 90%+, and output that pure sine wave after going through filter coils. Makes you think why these don't use similar technology. Realistically all this'd need to become a pure sine wave inverter is a coil and faster switching. When JBL first showed off their 6000w monster at CES they used it to power a reciprocating saw, and I'd guarantee it'd be better at running an air compressor than any non-industrial inverter. There are a few 35kW amps out which output into 1 ohm, which means 170 volts at 170 amps. 60Hz sine wave and you're powering a house no problem.

[@JLneonhug]

Power supplies are commodity items unfortunately. Difference between brands will mainly be QC. Reason is that there is minimal 'new' design work involved vs existing products. The bulk of engineering hours spent is for cost down or assembly efficiencies.

[@JLneonhug]

PS keep up the great work!

[@daanwilmer]

What QC? With the leads flopping in the breeze...

[@mddunlap03]

I feel the bulk of new engineering cost are spent in the marketing department

[@legendario13]

So Flow chart: If price higher>Is QC better? If not > Is a ripoff

[@burnerjack01]

@@legendario13 It is a proven phenomenon that the public routinely assumes a greater price equates to a greater value. Something manufacturers and marketing departments exploit on a daily basis.

[@perfectpete1]

If I was a VCR company I would definitely hire you to man the phones in the time setting technical assistance department. Your eloquent dialogue would be a huge asset for confused customers.

[@experimente9912]

13:25 I just wanted to point out that you had set the meter in the AC-Range while testing for remaining DC-Voltage in a capacitor. Such a mistake can be very dangerous. IGBTs also do not always fail open. If you overload them or overvoltage them they will fail short like every other power semiconductor. You can get an open failure because of bondwire liftoff. This can be caused by high temperature cycles/ripples, that weaken the bond.

[@skipp1970]

This is a switch mode inverter. It steps up battery voltage switched with some of the mosfets through the 4 small transformers at high frequency several thousand hertz rectified stored in the two capacitors located in the center. Chopped up by using the mosfets. Thus providing the modified signwave. The output stage is likely a h-bridge topology with complementary components. Really for the price I would much rather have the lower cost unit.

[@Matthijs3476]

It often happens with power tools that the inverter shuts off. It's because the tool needs a lot of power just to get going. It also helps if you just give it a spin. That's essentially what you were doing by keeping the trigger squeezed. I've got an inverter in my campervan which powers my compressor fridge. It almost always starts beeping when the fridge compressor starts to chooch. But it beeps only once, because once it chooches, it needs less power just to keep it going. Things that don't require much startup power like a water boiler or something are way easier for the inverter

[@Matthijs3476]

Do you think it would be possible to place something in between the battery and the inverter to keep the voltage steady during a current spike like that? Like a capacitor or something? Would be a fun experiment and improvement on the system. Though it might drain the battery.

[@vgamesx1]

Yes, as someone else suggested, get one of those BS power saving devices off ebay, it's just a large capacitor and it will be able to supply things such as motors that sudden inrush of current it needs to start, although as always the better solution is to buy a bigger inverter that can put out higher peaks of power.

[@Matthijs3476]

Yeah a bigger inverter didn't do the trick for me. Both of them display they shut off because of low voltage. So I'm gonna go try that tip! Thanks!

[@vgamesx1]

@@Matthijs3476 Well if you an overkill inverter and it's shutting off then that sounds like your battery can't give it enough current to stay on.

[@danstrayer111]

one of the most astute, technical in-depth evaluations I ever saw

[@6alecapristrudel]

Modified sine wave: becasue modified square wave just doesn't have that same ring to it. (And be cause it won't sell that well to the unwitting consumer)

[@garrettkajmowicz]

Modified sine/square wave would be a lot more useful if it indicated how it was modified. A 5 or 7 level stepped square wave would be much nicer than the 3-level one here. It depends on what you are powering. For a nightlight, it doesn't matter. For sensitive electronics I'd much prefer a better system.

[@mumblbeebee6546]

6alecapristrudel I can not work out whether the ‘ring’ in your comment was serendipitous or whether it was a perfectly crafted joke. So just in case, I doff my cap to you!

[@5roundsrapid263]

“Dandysocks”! Brilliant. A decade ago, I met some Canucks, and they complained about Dubya getting his dad’s old job. Shoe’s on the other foot now, eh?

[@Phynellius]

Pretty sure some of us aren't too impressed with the name brand politics going on up here either

[@Alex4n3r]

"Tianhe 3" on the oscilloscope :D

[@aspincelaframboise5300]

Stephen Coates; It ain't that bad anymore, the royal zionist harpercrite got lost eh... ÜïÖ

[@jeremy499]

Long hard day, but in the end nothing like drawing a nice hot bath, pouring me and my cats a bottle of wine, and settling in with my favorite KZbinr, but I'll watch this video before I switch to that channel.

[@Ddabig40mac]

I'm sure that tubalcaine is flattered

[@texasdeeslinglead2401]

You have been here awhile. It's showing

[@Dildo_Baggins.]

Ouchie

[@chevytruckman34]

I definitely appreciate how you tear these things down and examine them. In this particular case, I bought a 10K watt modified chinesieum inverter 5 or 6 years ago. It was only 350 USD. I wanted to take it apart before I put my solar system into action, but I didn't. I have to say, it's the best one I've ever purchased. I ran a solo clean line to my breaker box on a 30 amp circuit, and have used it many, many times to run my house. On a conservative level, of course. Lights, fridge, dish washer, fish tanks. I imagine that it'll monica lewinsky one of these days, but there are 4 replaceable fuses. Right across the front. Money shot.

[@MiniLuv-1984]

I was watching the battery voltage...it kept dipping below 11.5v when it overloaded...I think you need to give the battery a real good charge before making comparisons. All the inverter was doing was shutting down on low batt volts.

[@juniormoloch2783]

Exactly when I need to do some research on inverters. AvE uploads a video on them. Beautiful

[@mckenziekeith7434]

Sad truth is that the vast majority of inverters on the market are really shitty. I have had good luck with Xantrex ProWatt inverters, and I have heard that Magnum Energy inverters are top notch. But they are expensive.

[@dorfsteen]

AvE could you please draw us a picture of an angry pixie so'z we know what to look for if the little bastid'z show up when we're not looking?

[@theginganinjaofficial]

...Know what to look for when we aren't looking.... Why not just look around while you are looking?

[@JasonW.]

Check out the angry pixie dancing on his channel logo

[@CogandQuillWorkshop]

Angry Pixie T- shirt would be sweet.

[@zaphodb777]

b-

[@mannys9130]

There's an angry pixie on AvE's channel logo. The blue evil thing on the microchip is the pixie.

[@alexb5275]

“This thing has been eating asparagus all week; nastiest load I could find”

[@danhammond8406]

You can check if it pees green

[@0123terryb]

Another great video. Just to let you know but IGBT's can also fail shorted. I was a senior field engineer for Emerson Network Power for 30 years, servicing and commissioning Inverters as big as 1600 KVA and the majority of IGBT's failed shorted.You sometimes had open ones it depends on the failure mode(over voltage =open/over current=shorted).Those were much better than a shorted ones. Due to the fact that IGBT's have a non passive end of life characteristic(kaboom!) most open ones were because they blew themselves open. Better to have an open one than a shorted one when you try to bring the DC buss back up.

[@tbernardi001]

Thank you for coming up with the title of my autobiography. It will be called A Cascade of Failures.

[@CraftedChannel]

I used to be a Samlex dealer. We stocked the 12V power supplies only and those were first rate. Very reliable.

[@OLNO66]

“MOSFETs always protect fuses.” Thanks, uncle Bumble! That explains everything.

[@ericspda]

Both of those are cheap inverters. The online UPS's tend to have fairly nice inverters designed for 5+ years 24/7 use. Things are real cheap too if you get an older one with dead batteries, like an Eaton 9120 2 or 3KVA, or an Eaton 9130.

[@jiggermole]

Didnt even think about it. Got two in the recycling bin at work cause IT upgraded. Thanks

[@liljasere]

Thats not strictly true the inverter side of a ups is always in standby not continuous use but yes you can get some nice ones because they tend to be used on sensitive equipment

[@ericspda]

Not with an online, or double conversion UPS. The inverter runs the load 24/7/365, input power or not. They are of course much nicer than the cheapie line interactive units that are only made for intermittent use, but they also tend to have loud fans, notable standby losses, and high initial cost.

[@jiggermole]

Point is, free. Will have to hook it up and look at the output.

[@KSSilenceAU]

Jon Doe is correct Liljasere, in proper Line interactive units, the inverter is always powered, as its kept in sync with the Mains input, and in APC Units is also run in reverse to charge the batteries, so as soon as input drops, the load is switched to the inverter and the unit loads up off the batteries. You are thinking of the very cheap "Standby" units which only start and run the inverter once power loss or out of spec is detected. Line interactive is much faster to take over. Then you have Online double conversion, where AC is rectified and regulated into DC to charge the battery bus and power the inverter which is always powering the load at all times, unless the unit is in bypass, either due to a fault, or in Eco Mode. As soon as the power drops (when not in bypass) all that happens is the AC to DC rectification and battery charging stops, and the batteries seamlessly supply the inverter, which maintains a seamless zero transfer power output. Not quite as efficient as Line interactive, but wont cause issues with highly sensitive equipment either like a Line interactive sometimes does to fussy loads (If you have an APC line interactive, set sensitivity to high, unit reacts much faster and load drops are less likely, seen this personally). APC makes some really really nice units with their Smart-UPS Series. knurlgnar24 did a whole series of videos on them. I personally use APC Smart UPS XL (Online Line Interactive) and Smart UPS RT (Online Double Conversion), and they both output exceptionally clean power often cleaner than wall power, even the 15+ year old 700XL is very clean and still working.

[@BoloH.]

Why would you pay more for an inverter that's called Samlex when you can get the Eliminator?

[@RubenKelevra]

If you want to avoid that sparks on switching stuff on you have to use a solid state relais which can switch on the zero crossing. It's also much better on stuff you run via the inverter, since you avoid steep voltage drops.

[@jasonmhite]

Low end oscilloscope? It says right there that it's TIANHE-3, a friggin superconfuser!

[@crawdaddy031]

@@ruben_balea Probably not.

[@Sketch1994]

So what should I be calling my analog Kenwood CO-1504?

[@MostlyPennyCat]

@@Sketch1994 A real one. The knobs on that one don't even clonk.

[@maxheadflow]

Heck the stuff I worked on as an engineer, the mosfets typically failed as a open.. They do initially short out and then blow apart from the current. All that's left is the leads and heat sink tab, hence an open circuit.. :D It was real easy to find the one that failed.

[@michaelblacktree]

I wouldn't trust an inverter with french writing on it. The thing may give up at any moment. 😛

[@ronaldphillips5481]

Fucking inverter just died to excuse my French.

[@Intermernet]

Inverters switch sides regularly . Sounds French to me!

[@mikeyanp]

Lol

[@run-cnc]

Almost as bad as buying American made.

[@tonyeezi7315]

Coming from a nation that has spent most of history at war with the French, and beating them 99% of the time, I find this comment very funny!

[@kthwkr]

I had a sine wave inverter UPS in 1998. It output a very clean sine wave. It was huge and you wheeled it around like a heavily loaded handtruck. It contained two car sized lead acid batteries. It was given to me because the transistors had blown. I replaced them and got it back working again and avoided overloading it in the future so the failure wouldn't repeat. It threw away lots of heat creating the sinewave but that's the price you pay for that waveform. Previously I had used a modified sine wave which has lots of discontinuous steps and doesn't get hot like the pure sinewave UPS. But those steps create lots of eddy currents in transformers. I had several wall warts plugged into it. Power failed, and it ran for about an hour. All the wallwarts over heated and blew the temperature fuse. When I got the chance to pick up a broken sinewave converter UPS for free I jumped on it. The new walwarts today with the switching power supply are very tolerant of the modified sinewave.

[@raymondmucklow3793]

I'm 43 when I was 17 I met this local car stereo shop Kevin "Hitman"(ran out of his garage, his empire of dirt) we would install and compare brand name components to the cheaper, all the time and effort we put into these systems, and there was not much difference, much like you just showed. Some difference but that little bit of difference wasnt worth the extra money. We took most of the local sound shows. With our 2 or 3 thousand dollar systems. Watching the losers drive away with there 5 or 6,000 even 10,000 dollar systems. We once put 36 six inch woofers in a VW golf. That car hit. They were pyramid pro series. Cheap.

[@lrodpeterson3046]

You have just exposed the asshattery of the "golden ear". Kudos.

[@Mudsuitable]

I've always blew away high end systems with pyramid in the mid to late 90s and I still have those amps and subs and they still work lovely they've been in 9 different cars so far and I'm positive they'll outlast the next ones

[@hilltopmachineworks2131]

Yep the Pyramid stuff was really good back then.

[@OhRonaldo]

J C I had my 76 Comet window smashed for a pair of Radio Shack Minimus 7s I had surface mounted on the package tray.

[@scarlett5924]

lol BS i did it too back then and a pyramid or pyle etc wasnt killing anyone rockford and memphis or ppi list goes on mtx too you be lucky if that pyramid lasted a month

[@DabblePro]

You had me checking my headphones to make sure the audio wasn't coming out of my desktop at work, thanks for clearing up that the audio on the video was different

[@CaptRedshirts]

The Grindr App, because even a bull moose needs a 'friend' now and then.

[@Choronzon39]

Nice explanation of capacitance. Capacitance resist's changes in voltage. At least that is how I remember and was taught.

[@Conservator.]

Haha, the Samlex depreciated $100 in 21 minutes. From $600 @ 1:08 to $500 @ 22:30 😂

[@rotaxtwin]

I find that soldering connections like the one that had failed are a bit tricky in that your instinct is to poor the heat and pile the solder on and you get a good connection. Problem is the metal components are cast into plastic, so you have to minimize the amount of heat applied. I melted the crap out of a switch like that a couple months back, then realized that you're supposed to use crimp lugs on it. This outlet connection is obviously not a crimp lug connection, but it is one of the (relatively) few that are done by hand and the person failed to apply enough heat and solder. I suspect that when you repaired it if you applied too much heat you could easily damage the outlet. Suspect being the key word.

[@personal_penguin]

AvE, if it helps, your chain analogy for parallel circuits sounds like a trampoline to me - all the springs holding the load/weight together. If a spring pops, each has more weight, etc.

[@ericlil305]

My favorite video on KZbin to date

[@HamRadioCrashCourse]

Everyone is gonna be on that jazz cabbage.

[@Chrissy4605]

More often than not I find money spent with the education to know where it is going and why is much more fruitful.

[@GeorgeJFW]

We install and replace a shit load of inverters at work, and it's always the MOSFETs that blow out of them always! One thing I will say about samlex is they seem to last the longest. the main reason for that is not build quality, it's because they have a lot of built in protection for instance if you're using too small of a conductor or if you have a loose connection on the back of the unit it will not work. We seem that a bit here with the low battery voltage issue you were having. I have pile of these things kicking around I may open one up myself and see if I can fix it. there definitely not a cheap but I guess your paying for the " intelligent safety features" kinda like that shitty saw you took apart sometime ago it was built like shit but had a thermal shutdown so they charged an arm and a leg for it.

[@warw]

Love the music taste at the end!

[@galileo_rs]

Get used APC true sine wave UPS and use that as inverter. Much better bang for buck especially the larger "online" series.

[@prooftest9484]

YOU JUST BLEW MY MIND USING A GREASE GUN FOR HYD PUMP MAKES TOTAL SENSE THANK YOU

[@Honeypot-x9s]

i have a bunch of cheap ass inverters $80 2000 watt ones, and as long as not constantly overloading or anything terribly abusive they last forever. i have a couple that still working after a solid 10 + years. the thing is, you cant expect a good sinewave out of even the best portable inverters.. if you need a proper sinewave probably best off not using an portable inverter. i heard from some friends that deal with electrical engineering you can take the edge off of those modified sine waves by adding some of those cheap chinese "power saver" devices that are basically 1 or 2 huge super caps in a metal box ..plug that into the outlet on inverter then plug in device to it.. good for taking the edge off of huge spikes like start up of grinder maybe, and filtering some noise out. not going to filter out smaller noise under smaller loads but it can help..

[@Reversed82]

is there a hack to get smaller amounts of harmonic distortion out of a cheap pure sine inverter though? i've got a cheap pure sine inverter going, have not had any issues yet, but it has some distortion in the high kHz region going on...

[@Honeypot-x9s]

first imma say, this is mostly justa field of curiosity for me, i am by no means the go to person on this, im just relaying what i been told: that's the only issue i still have which hasn't posed any problems for me either, is low/no load situations still noisier and have their digital edge, probably a way using same logic just smaller caps and inductors on output to filter it will help. also depending on the frequency we talking about here, that be its own field of engineer. because high frequency energy seems to have their own physics.

[@viermidebutura]

Taking the edge means dealing with high frequency components. The capacitance of theae "power savers" is a few uF which at higher frequencies will act as a dead short in the worat case and as a heavy load in the best case. What you need is a choke in serie with the outlet or better a common mode choke

[@Eman2000]

A good pure sinewave inverter can give a cleaner waveform than utility power and will almost always be better than a gas generator.

[@Dildo_Baggins.]

What the hells an ass inverter? And how do i get one?

[@SigEpBlue]

Just an FYI on using the Kill-A-Watt on a "simulated sine wave": there's an MOV (?) inside the Kill-A-Watt that will get VERY hot when you feed square waves to it. I found this out when I used it to measure current output from an old APC UPS; I noticed a plastic-burning smell, and that the case of the Kill-A-Watt was getting quite warm.

[@merlingallagher4484]

Look at the Meanwell inverters. They are great.

[@keithjurena9319]

I bought a 3kW Canuck inverter for aboot $300 real us doll hairs and have run a 15 amp 120 volt compressor no issues. Of course its a 24 volt model MSW unit as its a paramilitary model. Didn't pay extra for the Camo either. Got it set up with 4 gauge 20 foot leads and a NATO plug so my former military vehicles can feed it without having to make sparks. Its also powered two coffee pots without issue. But my main former Army Horse came with a PTO driven Lima MAC 12 kW three phase beast so I have all the 120 and 208 voltage one could ever need. Only thing is that power isn't available while underway so hence the need for an Inverter. Joes need cold beer.

[@Tedd755]

"Modified sine wave" Not sine wave at all..

[@movax20h]

The other one says: "pure sine wave". total bullshit

[@CatDaddy6968-l5c]

The square wave we see with this device is literally the definition of a modified sine wave. Some modified sine wave inverters will have an additional step in the middle, but it's not required.

[@bhartley1024]

Really it's more of a modified square wave

[@pirateman1966]

Its a Chinese sine wave....

[@rehoboth_farm]

one step from pulsating DC.

[@inguzjc]

A clean workspace? Oh wait, I get it, a Halloween costume for your workbench. Such a kidder!

[@clencheastwood1571]

Cleaning up and eating pickles?! YOU'RE PREGNANT!

[@johnpossum556]

You said a mouthful there, squint.

[@BurpleRX7]

Ahhh inverters the bane of my life, as a truckie they are my best friend and after letting the smoke out of quite a few I stumped up quite a few of the queens finest and got myself a sterling power unit, a reputable brand within the UK, I had failure after 1 year and it was replaced no questions asked, Customer for life right now was my thoughts, What followed was 3 separate failures of no apparent reason and the customer service had disappeared, each replacement unit was now full price minus a tiny “very sorry” offering, For me the extra expense was in the customer service and the replacement value, when that stopped eBay inverters became the obvious choice and you know what,,,,, Not one failure yet 4 years later

[@MassimoTava]

Dyson has a new lady toy for you to test

[@pjgreenleaf]

yasssssssssss

[@texasdeeslinglead2401]

Music to my ears

[@ericdoke]

Test it versus a blender I hope!

[@danstrayer111]

pesky wabbit

[@declan765]

Can't wait to see some teardowns on some Mary Jane paraphernalia from AvE.

[@JoeMalovich]

You should tear open a Morningstar 300w suresine inverter in comparison. I snagged one on eBay for $133 (it was mislabeled)

[@n7565j]

I had a cheap 750w inverter (1500w max) I used for YEARS!!! Drilled holes, recharged batteries, and lit work spaces on new home construction sites. Never failed me once... Why waste good money on expensive junk when cheap junk works just as good ;-)

[@alexhaws2377]

You should see if you can get a peek of a Cotek inverter (bloody expensive). They have models that claim to be pure sine and others that are modified sine. I picked up a big 2000w one for spare/repairs - internals looked high end compared to what you have there (silastic on the caps, epoxy/conformal coating over everything). Alas, I was out of my depth in trying to repair it, even local eletronics repair shop couldn't get it to chooch - having to waterjet the epoxy/conformal coating off didn't help matters. EDIT: this is similar to mine: kzbin.info/www/bejne/qX-6fouFqaatd6M

[@whatcanilearnhere9158]

i salvage old backup inverters from various cell tower instalments and internet service providers. usually they just need new batteries (or just put jumper cables) not as efficient as "modified" sine wave, but real nice true sine (or kinda close on some) for running computers or audio, etc

[@ahensley63]

I want my Patreon money back. KZbin was down for 30 minutes. I'm going through AvE withdrawal and its someones fault. Do you know how many times I hit refresh???

[@lifuranph.d.9440]

Apparently...once too often.

[@allalphazerobeta8643]

I have an old wagon unit. One day it died from a bad solder unit. Unit would turn on if given percussive maintenance it. I spent a lot of time hunting it down but eventual did find the problem. Also, re-soldered a lot of suspicious looking joints. Than I tested it, all was good. Then Went to wire it up and boom. Blow the fuses out of her by hooking her up backwards. It's often cheaper to use a diode and fuses as reverse voltage protection than any other device because the other protection devices have pass the full current of unit through them.

[@paulchisholm9392]

Looking at the transformers I think that they are both switch mode. They first step up the 12 V to the peak voltage, about 170 V, then have a bridge on the output to switch polarity. This would account for the mismatched MOSFETS as some are used in the step up DC/DC converter and the others on the output bridge. As you say thay are both rubbish. With the more expensive one being slightly better (ignoring the soldering fault) though the electrolytic capacitors look pretty dodgy.

[@abdbach379]

Hi uncle. I'm an engineer (not electrical but I'm no stranger to pixis). The RU6099R has max Vds of 60V so it must be used for switching before the primary while the PF640 and the 40N20 are 200V so they must be used for current regulation after the secondary but the 40N20 has a max gate voltage of 20V while the PF460 only has 10V. If they're both driven with the same voltage level the 40N20 will get bad efficiency at high loads but I guess the 40N20 is used on the high side of a bridge since it could allow a bit more fluctuation in voltage at the gate as you know while Mosfets can pass a lot of oomph a slight over-voltage at the gate will render the inverter a smoke generator an expensive house heater. Still all this doesn't explain the different brands. ST has equivalents for the RU6099 and the PF640, maybe they're just going for the cheapest parts. Based on my experience 200$ is a fair price for the Samlex..... definitely not 600$. Tell me if you need further details. Cheers!

[@volvo09]

Where is knurlgnar!

[@colinloeffler3633]

So yer tellin me a capacitor is like a Walmart on black Friday

[@mikefitch4335]

Wait... WHAT.... an AvE video where it actually played an advert.... Thats rare !

[@jared-cn6ch]

So is a pure sine wave inverter basically a 50/60hz function generator strapped to an audio amplifier? Something I have heard of being done in a pinch to convert between 60hz and 50hz or to step down 120V-240V to 110V-120V with a pro audio amplifier (1800W @ 8 ohms / 3600W @ 4 ohms is theoretically 120V AC)

[@mattmanyam]

Rockford Fosgate used to demo their amps this way, hooked to a blender making margaritas at shows.

[@1noryb]

Essentially that is one way to do it. as I recollect, and I am no expert, a hartley oscillator amongst others produce a nice sin wave which may be amplified through A, B, or AB type amplifiers to produce a nice high power output at the desired voltage.

[@mekuranda]

@@Jimmeh_B that is not correct! There are two common inverter topologies ...high frequency and low frequency...the latter have heavy Fe core transformers, and both can be pure sine wave. The latter are much better at surge and short term overload conditions. Someone who is educated in this field can identify which topology is employed from the spec sheet.

[@mckenziekeith7434]

Well, yes, but only if it is a class-D amplifier. Also they do other stuff like try to detect if there is a load, and going into a sleep state if not (this saves battery power). The problem with class A or B or AB is that it wastes too much power. We usually want our inverters to be efficient because we are usually powering them from batteries.

[@dylanbarlow3218]

I have no idea about anything in this video, but I enjoyed every minute. Keep it up canuck

[@falcon7350]

like i have all ways say . running a MD inverter is like running a car on bad gas.. it well run but for how long . if the job calls for a SW inverter then pay the higher cost for the unit then for the cost of what it kills latter

[@MrBilld75]

Exactly, it's hard on anything you run on it. Even a simple fan. Computers HATE non-pure sine wave

[@herefishyfishy6907]

New subscriber here. Not trying to be "that guy", but I genuinely look forward to watching every video you have made. I have always had an interest in how things work. You make these intresting, thank you!

[@crawdaddy031]

Why yes Santa Claus IS watching...

[@mrdumbfellow927]

Guarantee instead of Santa pants you are wearing ass-less chaps.........can you confirm? If so, I know we shop at the same costume store......

[@lrodpeterson3046]

For the record, all chaps are ass-less. "The Big Bang Theory"

[@crawdaddy031]

@@mrdumbfellow927 Nope. I do have a pair of real leather pants and boots though. I grew up on a working ranch and did own a pair of chaps when I was 8yrs old.

[@crawdaddy031]

@@lrodpeterson3046 The English are certainly not assless ol' chap...

[@dickieearl4998]

I'm actually so f*ckin glad your doing stuff with inverters. Needing funkshoning pixie utilitarians, when you're a rookie is a pain. Bumblefuck skool of sinusoidal crocks for the freakin win... Thanks buddy, love your work!!

[@michaelkenefick]

Tri wing fasteners, the screws that hold McDonald toys together?

[@Fireship1]

Michael Kenefick and aircraft!

[@iancarnel8609]

And Nintendo devices

[@JBFromOZ]

Drinking game! Every time AvE mentions basal platten is skull a bottle of jacks

[@TheCanterlonian]

but i'm not a gentlemen, i'm a lady...

[@FracturedPixels]

All partakers of the bumblefuck are honorary gentlemen

[@dlevi67]

@@FracturedPixels Which is why he opens each video with "gentlemens"

[@Fee.1]

I’m not a troll AvE, I heard some of the comments you were making about trolls and while I agree they are rampant and everywhere with their keyboard karate, thought it worth mentioning in case my attempts to be funny in the comments came across as something it wasn’t intended to be. This may shock you, but you sometimes have the ability the come off ever so slightly as a guy it’s cool to joke around with/maybe even willing to crack a few yourself occasionally :P And yea I know now I’m a pansy for caring what people think etc etc

[@chasemc69]

anyone else remember when ave said he would NEVER make it to a million subs? FAKE NEWS sir!!!

[@steveb8341]

Don't mistake Fake with just plain old WRONG 8-)

[@georgeian3243]

I tried to help a guy get his conventional single stage high efficiency gas furnace to run off his modified sine wave inverter/solar system. The first time we tried a call for heat, the furnace control board started shrieking like a stuck pig. Never heard one do that before. I thought the board was finished but, once back on the grid, the furnace worked normally. The guy figured out to use a pure sine wave inverter, cost him $5K back several years ago, but the furnace worked OK off it.

[@kevo6242]

I’ll bet you didn’t unplug the grinder before you took the disk off I have seen first(very bloody) hand what that does to a man when the trigger gets knocked

[@Intermernet]

Yep, take the batteries out of cordless ones as well. A zip-cut disk goes through leather gloves in about half a rotation, and most of a finger in the next rotation!

[@kevo6242]

my buddy did not have any gloves on, it was a grinding disk but the hand got wedged between the disk and the guard. that ment i had to free his hand from it

[@michaeldeckard4952]

Thanks man. Makes me think about taking pens apart. Teaching is as good as learning. Everytime! I aspire to work with metal. Signed your average timber frame guy.

[@pirateman1966]

If you want the best video on YT that explains these inverters, Google "Inverters, How do they work ?" and get the one made by "learn Engineering" channel.

[@catsupchutney]

The Samlex has a very serious label, so you have that going for you. For the extra kopeks I would expect G-10 epoxy PCB and matched components.

[@JamesLewis]

$500, wow... that's way too much... Pure Sine is the only way to go!

[@davewave3753]

one of my work partners bought the same or very similar pink screwdriver on purpose-he figured there was no danger anybody would steal it-i think it's about 15 years later now & he still has it

[@CatDaddy6968-l5c]

The cheaper one is obviously better since it's rated for 2000W, while the Samlex is only rated for 1500W.

[@carlg5838]

That large heatsink extrusion may look more impressive than the ones in the cheaper inverter, but the only advantage to this heatsink design would be if airflow is blocked or a fan fails. Most of the aluminum is so far from the MOSFETs, and connected only by fairly thin walls. It's not a very efficient heatsink design, and the silicone insulator sheet required to keep the two sides electrically isolated doesn't help either. Sure, the top will seem warm after a workout, but with the cover off a thermal imaging camera will tell a different story! Most of the heat will actually be shed on the side walls nearest the FETs. The smaller heatsinks on the cheaper inverter are less impressive at first glance, but their deep fins forming a duct around the fans is highly efficient. So in dirty or remote, long term uses the Samlex FETs have a better chance of survival if a fan craps out (no feedback wires, so these inverters will keep on chooching). But for occasional use the Motomaster really doesn't need all that extra aluminum to keep its FETs just as cool - just be sure the fans are always working and clear of obstructions.

[@TwistTapeTechnology]

You paid $600 for that modified "sine wave" inverter? That things a cheap piece of junk...

[@drubradley8821]

As per the matched numbers on the transistors, sure, requesting "same batch" supplied from the supply house or manufacturers is kinda a good idea, but, there is simple testing equipment that allows you the test each transistor 's forward on speed and closing to "not" speed, and as long as the parameters are the same, you are good to go. None matching lot numbers and brands, no, it does not allow symmetric 's or a sexy looking typography on the cosmetics of the board, but too often, i have ordered in a batch of 20, and sure the label numbers are spot on, but all 20 measure differently. After a few times of shooting my self in the foot, i simply order 2 to 3 times the quantity that i need and have ordered as much as 6 times what i need. I typically do not order junk brands either. Same lot numbers i have found means nothing any more and the phrase, "never assume" now comes to mind, i just order a bunch, even with the claim they are matched, only the numbers match on the label, and the tolerance in % , is quite large, from the lowest to the highest part of the scale, which in many cases, will be fine, but the higher current handling a batch has to handle, and having one that turns on faster then the other transistors in that paralleled group, does take a beating. I even mark them from fastest to the slowest, on the more simplier projects, and the fastest transistor will be the first one to pop, that is of course if all the other specs are well matched, in the event of a over load or dead short across their grouped paralleled output.. There is my "2nonescence" ...... Dru

[@tdschisel]

"Happy holes" = demonitised

[@JasonW.]

I'm using a cheaper but still not cheap 3000w pure sine inverter. Oddly, or maybe surprisingly enough, it is brand name Reliable... Anyway, it runs on 24v DC, and I have two battery banks feeding it, 4 AGM batteries total. It will "reliably" simultaneously start and run two loaded sump pumps, 3/4 & 1/2 hp.

[@tnekkc]

I have spent 30 years designing PWM. The wife 40 years with designing Fluke DMM. But this week, I ground a quarter inch hex #1 philips down to a triangle to get a dog leash apart.