Chris,
My InteliPower only charges one AGM battery, and I've never had an
overcharge situation. The Charge Wizard senses the battery condition and
cycles as required to top it off or trickle.
The other two AGMs are recharged from the solar panels, and are mainly used
through the inverter when I need low current AC power.
AGM (Absorbed Glass Mat) is _not_ gel cell.
Roger Hightower, WBCCI #4165, VAC
1975 31' Sovereign
2002 Ford F-250 PSD