Off Grid Inverters - Pure Sine Wave vs Modified Sine Wave 

Hi mate. I do use a 3000w modified inverter to powerup corded tools like air compressor, saws, charging cordless tools batteries, etc like at ranch or where power isn't available. I'm debating to buy buy for home tvs and cameras when there's a power outage.

The „pure“ sine ones are mostly modified, too, just with more steps. You can see it on an oscilloscope, especially under load. For everything other then medical equipment a modified is more then enough, as you said😉👍

I have a 900/1800 watt Power Bright Modified Sine wave inverter. I'm interested to see what all it will run in my detached garage that has no electricity. Hoping to run some LED lights, a fan & mini fridge with 200 watts of Solar & 100ah Power Queen battery.

You did not demonstrate the differences between a PSW and a MSW inverter. For that, you'd need an oscilloscope. You did not measure efficiency in any way, shape or form. For that you'd need a simple Kill-A-Watt meter, at the very least. You demonstrated how one type of load runs off of those types of inverters, and you picked a load that is least likely to be damaged by using a MSW inverter. The bottom line is very simple: You use a PSW inverter unless you simply cannot afford one. If that is the case, you should think long and hard about how you go about charging and powering sensitive electronic devices...or you'll be replacing those expensive devices because you were too cheap to buy a good inverter. That is a classic case of being penny wise and pound foolish. At the very least you could have shown how going from the MSW to a power conditioner and then to the fan eliminates the noise caused by the motor not getting a steady, 60 hertz cycle from the inverter. Ask anyone who has worked in professional audio production about power conditioning to eliminate hum and you'll quickly understand how a cheap, $100 conditioner can protect your very expensive audio equipment from "dirty" power sources...like a MSW inverter.

What does a UPS system for computers produce? That should tell you there if electronics can handle the square. I ran a big screen TV and receiver off a lawn and garden battery for 4 hours at least using a 140 watt inverter that plugs into a cigarette lighter. Get em at the auto parts store. Whats that putting out? Mechanical motors do complain but being an X HVAC reject, a short time on one is not extending its life I put it that way. Try a refrigerator or a small window AC from house current then inverter and see.

Hi Shoestring, could you please do a video of using an electric blanket on inverter? I bought a sunbeam electric throw at Wally world over the winter and hooked it up to my hf 750 watt modified inverter and it toasted the controller on the electric blankets. I've ordered a pure sine wave 2000 watt inverter to see if it helps? It will be hooked up to three 122ah each deep cycle lead acid batteries...love your videos.

Hi. Is possible to use pure sine and modified inverter in parallel.

It’s hard to hear the difference over you talking…

Thanks for the video. You keep saying modified signwave. No idea what that means

great video, it was good to learn the difference

Thank you for taking your time and showing RU-vid! BTW I work at Gallo Winery and we make New Amsterdam in our Spirits Dept.

Why not run the inverters thru a Kill A Watt meter and measure the actual efficiency?

There are one big question and a lot of a lot of rumors out there that make me confused. Will the modified sine wave damage the fan motor in the long run? I read a lot stating that modified sine waves should only be used in non-motor equipment. Yes, a modified sine wave will run a fan motor, but it will damage it in the long run. Is it true?

Some power tool battery chargers (my Ryobi 40 volt charger, specifically) say "Do NOT use on modified sine wave power". That may apply to any tool charger over 12 volts - check the manual(s) for your charger(s).

Can i use a modified inverter with my led grow lights i found good deal on a 3000w modified inverter

Theoretical the modifies sine wave is less efficient in a motor. However your test does not prove that at all. Or did you measure for instance the windspeed vs the power draw? The question remains how modified sine wave inverter performs with for instance a switching power supply (like for a laptop).

I'm looking for pure sine wave inverter, wich brand do you recommend for 7000w?

can you use a 12 gague wire to connect to your car battery, and will it be safe to use with out killing your battery, or starting a fire?

How are you measuring efficiency?

Great informative video,can you tell me if the extra noise from using the modified sine wave inverter is coming from the inverter or the fan?

GREAT DEMO VIDEO...Many electronic devices manuals will say to use only a pure sine wave ...they are very sensitive and need clean sine wave for power.👍

Thanks babe

I use a 24 volts Aims 2000 watts inverter / charger...it is a pure sine and works great ; the only thing is the idling current is 26 watts, so sometimes if I just have a small load I use the 410 watt modified sine inverter...in two weeks I will get two more batteries...that will be 16 lol...every time I add two more it acts differently...in a couple months I will have a hard decision to make ; whether to get two more or not...the 14 that I have now are at 24.2 volts this morning...it's getting to be later before they start charging now , around 7 AM...

Thank you I didn’t know any thing different with them but I do like the blue one with the wave I did I don’t understand it but that was a good test I like it thank you now I know what kind of converter

Have you run a LCD off a modified sine wave. Thanks

Please come up with figures.

sold. thank you

😎