Turning off the Charging Process
After accepting the Limitation that I can't - and shouldn't attempt - charging my new BB Lithium batteries, it occurred to me that a few of the places I might like to go could get to freezing, or belo...
Forum Discussion
With Lithium you should only be concerned with charging after the thermal mass of the batteries has dropped below the minimum mfg recommended temp - there is no issue with discharging lithiums in cold weather, in fact they generally outperform other technologies in that scenario. For me that's roughly 0C, so I set the limit at 5C to be safe. I installed a waste tank heating pad taped to an aluminum sheet and put that under the batteries. Kicks in at 5C and turns off at 12C, without intervention, but I put in a cutoff switch for warmer weather anyways. Draws about 6 amps per hr. Victron monitor and temp sensor give accurate reading on battery temp and prevent solar from charging below 5C. I am completely off grid and it works great.
