Inexpensive inverters with 1 year warranty

pianotuna wrote:

Michelle.S wrote:
You need to be careful with small cheap Inverters as the voltage produced probably won't be clean (not a sine wave) and can harm sensitive electronics.

There is a place for modified sine wave inverters. Some are even rated to run motors.

Correct you are!

Ones like this industrial brute..



Are designed for use with heavy highly inductive 120V loads and never break a sweat..

TRIPPLITE PV1250

I will put this one up against any cheapo "pure sine" any day and win when it comes to not only starting a fridge compressor but not falling apart in doing so.

Yes, that unit costs MORE than most "pure sines" of that same power level, but it does something that cheap pure sines can't..

From link above..

"
Extended Peak Surge Power

Many tools, appliances and printers require extra power for start-up. Others, such as refrigerators and pumps, have fluctuating power demands. The PV1250FC accommodates these peak surge demands by providing up to 200% more output power than its continuous rating of 1250 watts. In OverPower mode, the PV1250FC can deliver 1875 watts for up to an hour, providing ample reserve power to keep tools and equipment running longer. In DoubleBoost mode, it can deliver 2500 watts for up to 10 seconds to support power-hungry equipment start-ups and motor cycling requirements."


Cheapo PSW or even MSW inverters do not have a surge capability more than MICROSECONDS and often even so much less than that they do not publish that specification.

Something else that irritates me, there is very little "sensitive" electronics.. Especially now days with the advent of switching power supplies. Pretty much every device you own now days uses a switching power supply, they are not "sensitive". Switching power supplies have a very large voltage range often from 100-250V for multirange and are able to easily handle not only 60hz but 50hz systems making them a multi system capable power supply that can be used around the world.

Desktop PCs are a fine example that folks love to claim as "sensitive", they exclusively use switching powers supplies and the first UPS units ever built were exclusively SQUARE WAVE and were meant for the PC industry..

I have used squarewave and MSW UPS units for yrs on PCs, have not had one PC powersupply die a death from being on MSW.. Die from age? Yep, I have wornout a lot of PC power supplies from age, typically 10 or 15 yrs the caps age out and fail.

Stop painting all MSW inverters with a broad brush.. Yes there are junkers out there in MSW, but so is there PSW junkers.