travisej wrote:
I do believe if you get the glass mat type batteries you can use them inside a storage compartment or even in the trailer because they dont boil or give off gas when charging. Maybe someone with more knowledge with this type wil chime in.
Sealed AGM's won't off gas during normal charging, but will in catastrophic situations like severe overcharging. Although the batteries are sealed, there's still a venting system in them to relieve excess pressure from overcharging. So providing some venting is still a good idea, although much isn't needed. An area with some air movement should be enough. They're generally considered safe for indoor environments. Really regular lead acid batteries could be used indoors as well. If you could isolate the batteries from any ignition source then it would be ok. The batteries can just vent to the open air. With the right precautions, batteries really aren't as dangerous as people think.