200, maybe 300 watts. I tried it on a group size 24 and even without an alternator helping out, it ran the computer and monitor fine. There wasn't even any funny noise on the sound card output. Only the monitor showed some small interferance lines which weren't that bad. I'm curious if the slight AC ripple of an alternator will affect anything. It probably won't since it's on the 12V-in side of the invertor.

I have a Wolf3D V4+ and it looks really promising. I will post up when the install is done. Approaching on the install in 14 days or so after the rotation assembly is balanced.