MEXICOWANDERER wrote:
Or go to Harbor Freight and buy their 2 cycle 800 watt generator
Then buy a MEGAWATT-400 watt power supply. Set it for 14.4 volts
When the sun goes down, the Megawatt comes online and runs until it out of gas.
If the batteries are real low this combo will stuff around 400 amp hours into the bank. If used and the batteries are sucking less than bulk maximum the generator will run longer before conking out.
This will zot a lot of amp hours into the batteries for less than 200 dollars after the sun goes down.
Excellent advice, David!
IMHO, the best all around RV off-grid battery charging setup would be to have solar ... plus what you describe above.