Group 27 AGM CCA

[spressomon]

@SmoothLC,
I have been using the dual bank Powermania Turbo for the past dozen years or so but one bank recently died and am using solar with Victron MPPT charge controllers to keep the dual Odysseys happy. Yes, when the 100 isn't being driven, which is much of every year these days it seems, I keep the batteries on the charger. There's no harm if the charger/s are multi-profile "smart" chargers.

15+ years ago there wasn't the plethora of suitable battery chargers available as today. I also have a 30A Victron charger I use for the LFP in the Escape trailer when connected to shore power. But it would be a great charger for the Odysseys but not dual bank.

Turbo MV2 Series Dual-Bank 12A Battery Charger | West Marine

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[JDM Journeys]

Running a pair of group 94's in my 70 series - AGM Canadian Tire Eliminators which are supposedly East Penn. Both are 5 + years old and haven't skipped a beat even when the weather dips into the -30's C. Listed CCA is 800 at -18°C. These are in a 24v system with a third AGM out back charging @14.7v via a Victron DC->DC.

I rattled enough L/A batteries to death back in the day so its AGM/everything. I did get 11 years out of a pair of yellow tops...My ctek gets cycled for a day or two on each vehicle (actually three times on the 70 series) once a month.