3 years latter and your videos are still great to watch over again. Thanks for all your hard work man. :)

"Let our powers combine!" Nice hack! Could be a first. Since I have a small pile of the 410W inverters kicking around in the garage this is for sure on my to-do list of projects now. Keep up the great work.

Thank you for your very patient and well produced experiment! You're awesome!

Great notion for an inverter video K !!! Enjoyed it thoroughly !!

Your a very smart man. I learned a lot from two of your videos so far keep up the awesome work :)

Thanks for the demo! You answered all the questions I had in mind. I have the two same inverters you have.

some fantastic demonstrations, im new to all this and getting some great knowledge on this subject,and with a bit of humor in there im looking forward to more. new subscriber

13:25 so I came across your video by asking Google "can I take two 400 watt power inverters and join them together in parallel to make one 800 watt inverter?" Boy am I glad I did that. Not only was your video very informative, but entertaining as well. You have gained a new subscriber. Although I will not be joining mine together I think I'll just keep them separate. Thank you for the video, now I must find some flammable liquid to place on top my mini fridge.😅

thanks for this video, love them and you knowledge on inverters!

A million thanks for sharing this. I love your sense of humour 😀

Great job that worked really well. I noticed some copper links in tape on the PCBs near the power inputs I wonder if they are used as current shunts. I'm also curious how long it would take to overheat at over 800w output.

I used to be skeptical about the importance of keeping my flammable liquids in close proximity to my mini-fridge, you've really helped push me off the fence on the issue. Liked and subbed!

You are an excellent teacher. Thank you.

I see this video has been around for a while.. Very funny and love the mini reefer with flammable liquid in front of propane cylinder. You for sure know now to Partieee... thumbs UPPPPPP....

would changing the caps for larger ones let handle a higher peak draw startup surges better?

Really impressed of your video it was awesome I learned some new stuff. Like buying a better amp meter amongst other things . I have a question and crossing my fingers you're still answering them. I have a 12v lit ion battery and would like to know what size inverter I can use? Thanks

I so much love your videos, thanks I just learned a lot from this video.

how long is your cord ok got that, 50 feet of 12 gauge is a pretty long run for any high current

Very interesting - and this time remembering to subscribe!. This triggered a number of thoughts for me, so I thought I'd share a couple of them even though it's an older video. Why not add some more capacitance to the two linked ones (or to each individually) so they can handle more surge current, to the limit you looked up for the MOSFETs? As to construction: 1) When you had it all apart one could see that the boards could be easily stacked, put into a new case with a shared heatsink, also allowing some reconfiguration within the case and/or fascia layout, if desired, including more capacitance; 2) why not add a current sensor and relay within that new case, and switch on the backup circuit when a threshold is reached -- automatic more efficient convertor that can have one side disabled if it breaks down. The above could be done while preserving their cases, as you've done here. In which case, why not discover the location of the connection spots on one, locate where a hole needs to be drilled in the cases to reach and solder those locations (covered over with tape after), define a connection method (like snaking a plug to the back or underside of the case), and you can easily swap multiple units as desired. Can't wait to check this out with a couple of 1500 watt units. I'm considering starting an open design for an efficient multi-input and output power system for use on boats, RVs, and off-grid that can convert, store, and condition any available power source, automatically choosing between that best available sources, etc. This video triggered many ideas to improve my system. Keep up the good work!

Well, i had run a mini fridge on a single 400w motomaster inverter, a fridge really similar as yours on a decent steady power source and it would just start right away, there was still some space on the inverter for cell phone chargers.

Can i just use 3 inverters.One off grid to provide voltage reference and then connect 2 grid tie ones that can normaly sync in my small grid?

I would love to have a discussion with you about the dark art of mosfet substitution.

You are brilliant, my friend

Wow! I love this info. I may not use it but thank you.😊

Can you review an sma off grid inverter ?

do you think you could do this with house generators. I would like to build something comparable to a house with the main breaker open and multiple generators plugged into various wall outlets. its for a campground.

Superb piece of knowledge. Awakening and educative.

I am doing a stand alone system with solar panel using this brand name inverter. Do it is possible to use the alarm of the inverter to add a relay hook to a charger with the on grid that allow to charge the batteries during cloudy days?

Hi! Why are you running a white and a black cable between the 2 poles of the batteries in parallel? Thanks for replying.

I have two inverters a 5000 watt and a 3500 watt if I increase the 3500 watt output voltage capacitor to match the 5000w I can effectively run both inverters tied together with no issues?

I really like your videos, The 5500 btu window a/c , About how big of a inverter is needed to run only on battery power ? also do you think 24 volt inverter is any better than 12 volt or it doesn't matter. Thank you for your very helpful videos.

That seems to work fairly well, considering that the DC-DC converter in those units are accomplished using an SG3525 switching regulator controller, yes you're right that the bridge rectifier stop's current from flowing back into the other inverters DC-DC converter stage However I can tell you that if you turn on both of those units, without having the high voltage DC in parallel and take a reading you will find that they are deferent by as much as several volts, but because of the fact that the SG3525's are very precision regulators, so which ever one is set the highest in voltage will try to take the full load until the current is maxed out, that is why you saw no change in efficiency when turning the second inverter on and off with a little bit more than half load on them, and it is also why you blew the fuses in the one and not the other. On some of these inverters they have a trimmer pots to adjust the high voltage DC, if those units have them you just need to adjust the high voltage to within a few 10's of MV of each other if there done with fixed resistors it's likely that they are off by quite a bit, and you should at least replace one of the fixed resistors with a trimmer pot so you can at least adjust that one too the other, you will get a lot better results.😉

Will the invetters still work in parallel without connecting the capacitors together? Thanks👍

is there a limit to how many you can daisychain together?

Awesome concept of paralleling two inverters... did not know the larger inverters are generally 2 half wattage inverters...interesting.

So can you get _800 Watts_ out of _each_ inverter? How about at the _same time_ to power different items?

14:31 that is a pretty neat looking fridge.

Great job. keep up the killer videos Thanks.

Great video, but who do you keep looking at above camera? ;)

I have a 3000 watt inverter. Could you look at it I would pay for you time and shipping

If you boost the input and output stages with more caps you can probably get the power saw started and the vacuum.

thanks for the video .. i wounder if you tried connecting more than TWO inverters . like 1000+ 1000 + 1000 = 3000 can you do that ???

So could I wire up 10 inverters to power my 30 amp RV or 30 inverters to power a 50 amp RV, similar to this way? Maybe jumping all of the input capacitors together then having short 15 amp AC power cables come out of each inverter jumped to 6 gauge cables connected to the RV circuit breaker panel box? Not sure how to get the two 50 amp 120 volt legs 180 degrees out of phase with each other.

Ive had that inverter for a couple years its had some major abuse and just keeps ticking

a modified sine inverter(bestek 1000w) can power a fridge? or it is needed a pure sine?thx for sharing,

Love the video, not sure if I'd try it myself. But nice to know it can be done. What I am curious to know. Since you're getting 60v on the hot and 60v on the neutral, is there a way to ramp them up to 120 each, yielding a 240v inverter.

How do you balance the frequency of the 2 inverter at the same time.

are the out puts tied still tied together with the orange wires? how are the phase of the inverters synched? have you ;looked at the output with a scope? might want to

I bet them fuses belw with the circular saw, seeing how it performed the second and third time you pulled the trigger

Interesting but not practical. But it is the unpractical things that satisfies the ultra curious mind. I like all your videos.

"DO NOT REMOVE THIS TAG" *rips it off* LOL (XD)

What if they have same voltage but one is pure sine and one is modified. Can you run. Them like that?

The current clamp on meter , what model is that? If you please can you go over current meters dc a ac types Thank you

The junction temperature of the output transformers when doubling the output power, would necessitate consideration of the heat sink design, otherwise, some form of thermal overload protection.

do you can do a triple Inverters

Used pure sine wave inverter with a surge current three times as RMS (continues current) to run a motorized appliances. Motorized appliances has a surge current to start.

I wonder if a 1500w mod sinewave inverter could be boosted by extracting the dc intermediary from an inverter-type gasoline generator..? This way one could use battery for most items, but start up a generator outdoors for when you do power appliances.. Perhaps with a rectifier for safety... Hm..

Great videos and lots of information man,i would like to know if this could be done with two 1000 watt wagan slimline inverters?

I was interested by your experiment, but I am confused. How did you handle the phase difference?

Did you try measuring the current at the input of both inverters to see if they share the load equally?

Knurlgnar24, question? Given the particular setup of the batteries and inverters as per this video would it be possible to attach a battery charger on one inverter connected to the battery bank thus charging the batteries while using the other to power a typical lower wattage item? Ie: effectively negating a significant drain on the batteries by the system self charging during use? Hope this makes sense! Cheers, rich.

You're really sharp...

How does the AC current get from the second inverter to the power bar ?

I have tried this but I toast the two inverters and my friend told me my inverter is not design for parallel set up so if I be doing it again I will the one that says can be connected in paralled.

Question: Is the Phase of the two in sync? How would you fix this issue? Does it matter?

Your a genius, Omg awesome and something I can afford. Thank you so much for sharing:)

It's an economic measure. The company probably makes multiple models, and the output stage probably does not have much cost savings going with components matched to the power output, so they just use the same output stage on say the 100 to 1000 watt models. Which makes sense because the output is lower current. The input stage has beefier components due to handling the higher current. So there is savings by matching the input stage to the desired output of that model. Thanks for a well thought experiment.

Because the leads to the batteries both go to the same battery, the other battery has an additional length of wire giving it more resistance. Thus it won't discharge as much and won't charge as much. Move one of the leads to the inverter to the other battery. The the voltage across both batteries will be the same and both will charge and discharge equally.

You look like Stu (hang over movie) Stuart Price 🤣🤣🤣🤣 nice video !

What size ring on wire

Sooo... I know You mentioned the construction Could be an issue. I was not fortunate enough to purchase identical Inverters. So I recently purchased a Shumacher 750w, I now want to add it to My current slightly older Green Fuel 1000w. What do You think would be the outcome??? Is it plausible??? Watt variance an issue???

so what did you try to proof

on your air conditioner i start it without the compressor running with just the fans after the fans are turning activate the cooling part.

I am enjoying watching your videos. After seeing your review on the Cobra 2500 watt inverter which I have I decided to go in a differfent direction. You really gave the the Tiger Claw 1500W pure sine wave inverter a good review. in terms of output would you say that the tiger claw would be anout the same as with the 2500 watt Cobra? Could 2 tiger claws 1500 inverters be wired in parallel to double the output?

great!! i had seen parallel connections dor duplicate the output power in inverter generators (like yamaha). There, the bridge its a simple two wire cable, same like you do in your video. I really believe that its possible, obviously the output semiconductors that were after the transformer (whatever that been.. triacs or SCRs or Transistors) will drive more power and should be recalculated and changed by bigger ones. Additionally your injverters are power rated 410W but uses 20A fuses, I think that the real max power should be around 200W and the peak power is 410W (depends the inverter but peak power commonlly its for just less that a minute) But its an interesting project... i will try with my inverters... thanks

was ur bar fridge 12v or 24v? ive just brought a 1600w Pure sine wave invereter an it wont run the little barfridge

I know you like to experiment with things and ideas... so here's a BIG one for you and anyone that cares to comment on it. what would happen if you hook a grid tie inverter to a non grid tie inverter? will the grid tie feed back AC into the non grid tie? will that make grid tie a charger to the batteries since it's been fed AC?

Great content. Great video.

Hi, I have "2" Xantrex Pro 1000w (2007 model) I would like to build a "mobile hand cart Generator," also I would like to hardwire both inverter to a small 2-pole (30 amp breaker box) to hook up an 240v outlet to run my lincoln welder ? to your suggestions will be really appreciated

Some parts should have been omitted as they were long and negated latter. It would be awesome if you did a quick heat measure, sustainability test at ~800 watts. Great videos and keep it up!

How are you combining the load capacity of these in parallel with only one inverter feeding the power strip? Are they tied together internally? Couldn't you come out of each one with a 120v cord then splice them together in a j-box with a plug to feed the load? I'm wanting to do the same by adding additional inverters to my system to increase the wattage capacity to feed my house panel. I agree with how you have the battery +/- split to balance the DC voltage. If I use identical inverters from the same manufacturer they should all have pretty much identical output sine waves & voltage readings so there shouldn't be any reason for them to interfere with each other negatively. It will only be one phase 120v but I can work with that. Your thoughts?

Can sine wave inverters be connected this way?

i guess you did not understanding what i sad, but its ok, i like you videos any thanks for your time and keep on with the good work, i been learn a lot with your videos. best regards, fassphoto.

Hi there. I had a 600w (12v) inverter that jystvwasnt good enough . so I bought a 1000w one . on the box its says that Max peak I'd 2400w . however when I use it it feels slightly stronger than the 600 w . anything above 800w is tripping it and restarting . I haven't checked fuses yet as its brand new unboxed. I have a 2000w heater that has 2 buttons .. First button says 750w. Switches on . that's good. But if I try just the second button of 1250w . doesn't work . if it'd 2400w peak , why not?

How are you linking both outputs on each inverter to produce 600w?

Thanks. I have a 3kw 240v continuous and the infernal thing done plummeted. I tried to make a portable ev charger for my Chevy Volt w/ bad ICE. I wanted a bigger inverter because the ev charging cord shows 3100w during charging. But my lithium batteries may be insufficient. I'm going to open up my inverter and add solder along the primary tracks like you did. The setup did power a 240v cooktop burner. I am a traveller so I used a travel voltage adapter to attempt to run a space heater which the motor was erratic. And my guess is I may want to request refund on the inverter since it was supposed to be pure sine wave, so the question is why the fan was choppy. Oh yeah and I took the 3 50v battery packs and hooked them in series without inverter and they ran a 150w and 3 25w incandescents for a reasonable amount of time. So I'm spearmint-ing still. I'm about to fix my ICE if I can but tell you the truth I'd rather expand my HV battery pack for more range. But this and part 1 were very informative and hopefully will help me a great deal

I don't understand why is the output only on one inverter? Why not put in parallel the output also?

Just watched the 1st Video. Thanks!

is it possible to amplify the power than the battery has already ..? any one, please help me to understand.. inverter maximizes the voltage.. so what about electricity..? p = vi ....

You should connect 3 or more inverters together to get more watts

Awesome effort ! great video. I have been watching more and more solar, inverter videos. I circled back again to this video. I have a few queries : 1) Will the load be shared if the inverted are dissimilar( like one is a 1000W ) inverter. 2) What will be the case if one inverter is grid tie (ex: 300w) and I want to increase the output power to 500w by coupling a normal 300w inverter connected to a matching solar panel or a battery input. Please let me know your thoughts.

This was great,I liked it

Extension cords can change what your inverter can handle ,the shorter the cord the better ,keep n eye on the gauge wire in the cord when you buy them ,look for 12 gauge wire in the cord

Ok...well it works...excellent...! :) Could you do this with bigger inverters? The only problem that I foresee is that the H-Bridge devices could be potentially be operating far closer to their maximum ratings than in a smaller model. Do you agree with that?

frist of all im gonna try this fridge, because we wernt able to try it last time, this time i have this electric heater blowing on it, now it thinks it hot in here, and it will be more than happy enough to run, so, this is a 55kw? lol

great videos, thank you. BTW: 1 horsepower is a little over 700 watts... so 3 hp = 2100+ watts

Could potentially this concept work on other various size inverters? In theory obviously. Im sure there are other variables you cant account for in this question lol

I like this as it gives me a easy hack to potentially make a dirt cheap 24v inverter:P

The same way we ( Convert 3 phase AC to Single phase AC Circuit ) , we complete isolate one from other, than we mix again and adjust the outside volts and amps, using oscillators circuits and big MOSFETs, what do you think, if we do the same with 2 or more (absolute-same) inverters. connect they individual input to the same OR different battery bank, get they individual output and treat as individual AC phases, and than ( Convert 3 phase AC to Single phase AC Circuit ). Please let me know your thoughts, Please let me know if I am not clear on my comment. best regards and please keep rolling.

Could you keep stacking the inverters? say make a 20 converter stack and have about 7,000 watts? Just asking...