Advice on 12v Invertors

[Skean Dhude]

Remember A/C goes up to max voltage and then down through zero to -max voltage.
Pure sine wave is a smooth power curve over time and is like walking up and down a smooth hill.
Modified sine waves use steps to change voltage so are more like stairs and they also go up and down over time.

Some bits of kit don't like the 'lumpy' modified sine waves. However, as pointed out they are much cheaper to make.

If they are unmarked that usually means modified sine waves because some people look out for the pure sine waves and if you make them then market them.

I have mainly modified sine waves but a couple of pure sine waves for kit that insists on it.