1,000 watts in my 'van.
Used it once to charge CB radio batteries because the CB mains charger does it in 1/10 the time the ciggy plug adapters will.
Once upon a time I used to carry a 300 watt in my Patrol but never used it so don't bother anymore.
Inverters are extremely inefficient, no biggee if you have the power to spare but if you are running close to capacity they are not that user friendly

