Originally Posted by shootist
Just look at the weight of the inverter. 65 lbs or there about is what a transformer type weighs. Light is going to mean it's solid state and they don't hold up as well.
"Solid state" is not the correct term. The lightweight ones are "high frequency" (HF) and the heavy weights are "low frequency". I do have to agree that the LF seem to be more durable.
Totally different design approach to get to the same goal. On paper, it should not matter, but ...