Uhm. You might have some numbers mistaken. 80 watts at 120
volts is also 80 watts at 12 volts. It's the amps that
change.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"charlie" wrote in message
...


80 watts at 120 volts is the same as 960 watts at 12v. add
in the losses in
the inverter, and you're gonna need a large battery