Quote:
Originally Posted by Chance
As I recall, AGM batteries were initially adopted mostly for Class B van campers because using flooded batteries was such a problem. You couldn’t place flooded inside, and if mounted under the van, it made watering very difficult.
At first, AGM batteries were mounted under the van floor, but some builders started moving inside to make access easier, and also to protect from extreme temperatures.
I do not recall seeing any Class A or C RV with AGM batteries inside the living space.
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My 1968 UltraVan (class A) came with two group 27 FLA under the driver's side bed. Yes, you had to remove the mattress and open a 3/8" thick plywood door to water the batteries As soon as group 31 AGM deep cycle batteries became available, I switched to them. Corvair cars came with FLA batteries in the engine compartment. Air from the engine compartment was used to heat the entire car. The batteries had special battery caps with rubber tubes that vented outside. The reason was not so much the the fumes would be dangerous to the car's occupants but the fumes would soon dissolve the magnesium engine cooling fan.
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