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Old 08-25-2016, 08:23 PM   #17
Chance
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 6,187
THOR #2121
Quote:
Originally Posted by BHoraist View Post
I've been thinking of adding 2 coach batteries for a total of 4 to extend the time running on battery without recharging. My 2 batteries do OK but overnight they drain down just running the residential size refrigerator. Can anyone give me advice on how much adding 2 batteries will help? Can you run the AC units on battery?
Doubling battery capacity will increase run time by a little more than double -- everything else being equal.

As to air conditioners, there are motorhomes set up to run smaller efficient air conditioners off batteries, but they won't run long. With enough "regular" lead batteries you may get an hour or two.

There are some Class Bs that offer huge lithium battery banks (up to 1600 Amp-hour) that can run much longer, but their cost is prohibitive (for my taste anyway). With enough money you can certainly run an AC overnight, but for now it's cheaper to run a generator.
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