I talked to Richard from PriUPS and he says he never had an issue, so it sounds like the Prius doesn't monitor for parasitic drain. So id say it should be good for 10kw while stationary. I'll try some load tests and report back.

Hi all, New member here. I've actually designed my own mains power inverter that runs on the 200V DC battery of the Prius. The aim is to use my inverter and the Prius to act as a backup generator for my house when grid power goes out. Also good for camping. Has anyone tinkered with this stuff here b...