I suppose I'm the odd man out here but I rebuilt my mobile set-up two years ago and I have never looked back. I run a 2000w inverter directly from the battery on my 2004 Wrangler. I have never had a problem with the inverter, the battery or the alternator. I only run my extractor in the shop but if I had it on the road I'd definitely beef up the inverter. I run the usual equipment, vac, polisher, lights etc. and never have a problem. I use a gas pressure washer but in the rare instance I have an early morning gig in a residential community I have electric pump back up system that gives reliable garden hose pressure with virtually no noise. Try the inverter route first. It's much cheaper than a generator and if you don't like it you can always switch and keep the inverter for your electric shaver.
