Battery life depends on:
depth of discharge
how long it is left discharged
how often it is returned to 100% state of charge
never have the plates exposed due to low electrolyte levels
If it is never taken below 12.2 volts, never left discharged (i.e. immediately recharged) and returned to 100% state of charge you may get 9 to 11 years of service. A good way to accomplish this is a decent solar charging system. For my detailed thoughts on adding solar surf here:
https://freecampsites.net/adding-solar/Your battery has been taken to 7 volts repeatedly. It is dead as a doorknob by industry standards.
Homestead or Bust wrote:
Another basic question- about how long should my house battery last?
Duracell 24DC RV MARINE. I think it's about 4 years old. SO maybe thats just to be expected at this point.
I guess I'll start with checking the cells for water just in case, and then maybe take the battery out and have it tested. Then look at other components...
Also, any recommendations on a good battery that doesn't break the bank? The above okay?