We have a wonderful saying down here, in Spanish, about B
S. artists...
AND IF NO ONE WOULD BELIEVE HIM IF HE SAID HE OWNED AN AIRPLANE, THEN HE WOULD SAY HE KNOWS SOMEONE WITH TWO"
The 22-dollar Cheapowatt can deliver 30-amps at 12-volts. God forbid the RV Owner who cannot live for a few hours on 30-amps for hotel loads.
A three way marine cutout battery switch is used
TO SELECT NORMAL CONVERTER - CHEAPOWATT or just plain OFF.
With the house batteries out of circuit the owner can play Chester The Molester with the house bank without affecting one single house circuit. In addition the Cheapo plays the part of emergency backup. Twenty two dollars, a marine switch, some wire, and terminals.
Obviously if a generator is large enough it too is eligible to play Ring-Around-The-Batteries.
Provide a book and what did someone do? They ate the pages. "Ehhhhh - What's Up Doc?"