westend wrote:
I have solar charging them daily. The solar is a great helper but it results in faster electrolyte loss than typical use with occasional charging.
Sounds like the solar controller is chargin at too high of a voltage. Higher voltages is what results in gassing of batteries. Float voltage should be around 13.5 or so once the batteries are fully charged. If they are continually held at 14+ volts, gassing occurs.
In my RV it was very difficult to check the water level in the batteries. I killed them due to lack of maintenance. About 2014 or 2015 I switched to AGMs.
My Upgrade to AGM Batteries