How to boost charge AGM batteries in storage?
The manual for my Lifeline 100 Amp Hour Deep Cycle AGM 12 volt batteries says this: "While in storage, batteries should be boost charged every 90 days or when open circuit voltage drops to 12.5 vol...
Forum Discussion
At this point, ideally you want to apply a temperature compensated charging voltage of 14.3 volts until the amperage drops to 0.5% of battery AH rating. It seems you have 3 ways to accomplish this. You can buy the Noco or similar charger and use the "repair" mode. The manual does not detail what happens but presumably the charging voltage is bumped up. I think it actually goes to 16 volts which might be more than needed and unnecessary. Your second choice would be to pull the RV out of covered storage, install the batteries and use the solar system. Ideally you have a 3 stage charger that can hit and maintain 14.3 volts. Your third choice would be to again install the batteries and use the built in 110 volt charger by either plugging in or running a generator for the many hours needed.
