Junk said:FZJFillmore - if you can afford a true sine wave, then get one. Otherwise go with the modified sine wave but either way get the biggest that will fit the budget and the space limitations you have. I have 2 in the truck right now; 1 and 1,100 watt true sine wave that is perfect for anything important and a 3,000 cheap modified sine wave one for raw watts.
My view is everyone should have one. The money you spend on them will quickly be made up for not having to buy those expensive car adapters. They come in handy so much.
Junk,
Did you fit the inverter behind the finishing panel behind in the cargo compartment of the 80? Does that affect the cooling of the inverter?
John