Originally Posted by formerFR
Sams or Batteries+Bulbs both probably have the DURACELL GC2 golf cart/rv battery you need, and both around $99 each....
you don't want CCA 'starting' batteries - that is for 'starting' vehicles, not for 'running' refrigerators and inverters : )
If you 'dealer' knows anything about RVs, and apparently they don't, 'normal' vehicle or boat batteries don't go in RVs.
If by "Boat" you mean "Marine", they actually do work fairly well in RV's as long as some common sense is applied.
First make sure that the battery bank is large enough to run the residential refrigerator for the hours it won't be possible to use a generator to charge. This usually is a period every day starting at 9-10 PM to 9-10 AM (times vary by location).
Second, the bank should be large enough to accomplish the above without going below 50% state of charge.
Lastly, make sure to FULLY recharge the batteries (often as long as 10-12 hours depending on charger and battery bank size) before starting the next cycle.
Yes, Golf Cart batteries (GC-2's) hold more energy (per pair) than a single Marine Deep Cycle battery but you still need to follow the above "rules".
Residential refrigerators are great if you have electric hookup but for boondocking or extended times between "plug ins", not so much. Just be prepared for long generator runs or install a good solar system to keep up with the drain.