It is not a pure sine wave

, testing proved a solid square wave.

Remember is not pure sign wave, but it works well for all my electronic uses.

I returned it for a "pure" sine wave one

After building the 200 Watt power system with success and doing further research it appears pure sine wave would be worth the extra dollars.

Some appliances may need a pure sine wave and this is not but is ok for lights, drills

it works as it says it should.

Works as I expected.