I have a 1,500-watt inverter on my boat that can run my entire rig. It's a modified sine wave, though, not pure, which I found makes no difference with anything other than some electric motors such as fans. Everything else, including my microwave oven works on that inverter just fine.
All the best,
Gary

_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)