Re: Power inverters and their uses
We actually did this, sorta-kinda, in a State motor home with Flintstone-era teleconference equipment. It had 2 Sony TV's - a VCR - one or two DirecTV modems - an industrial cube Windows 3.1 PC with tele-conference PC board - and a 'web cam' type camera.
All this was mounted in a corner cabinet. There was a small UPS added inside to prevent power hiccups from losing sync on video signals. With all the power and signal cords, and the cramped space, one of the other techs had managed to plug the UPS into itself. It worked fine for quite a while, as the battery slowly discharged. The UPS finally sounded an alarm, which seemed to be for "no apparent reason." Tearing into the wiring, I found the OOPS on the UPS.
Seriously, If you hooked up your closed loop to fully charged batteries, with nothing else connected, it would sooner or later drain off the entire charge. The efficiency loss of the inverter, the heat generated in the motor, alternator, and wires, and the friction of the V-belt would each take a little bit of the energy stored in the batteries, without putting it back. Any outside load would draw additional power out of the batteries, with no replacement.
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.