MEXICOWANDERER wrote:
Good grade of AGM can withstand discharging to 30% soc but the maintenance for recharge must be as strictly rigid as a Trappist monastery.
This is where thick plates pay for their room and board.
With our camping routine doing 50-85s (approx.) with AGMs for a few days and then a two hour drive home, the alternator and solar charging during that two hours brings the batts up enough so they won't accept the required 20% amps.
Huge PITA to recharge them to full once home. Have to rig a switch to kill the solar and alternator for the drive home, or else as now, run the batts back down once home so they will accept the 20%.
The recharge to full at proper voltage to 0.5 amps per 100AH is no problem. It is that dratted 20% rule. And the battery spec sheets don't even mention it as a requirement. Only gives a max amps no min amps.
It's always something.
