i have a residential fridge in the safari
with 600+ watts for solar and 665 ampHr battery bank,
5 BIG AGM batteries
just fridge , no lights etc, with good sunny weather
i still loose approx 4-5% per day, sitting still stored, with fridge on
example fully charged 100% at 6PM tonight
tomorrow night at 6pm my meter will indicate 95%, the next day 90% the next 6pm 85% thats approx 35 ampHrs per day loss, that is NOW, more power is produced during the summer
i would suggest a minimum of 400w of solar
how many batteries, what type, what size
the OEM battery setup should be good for at least 24hrs, with out any solar