Trojan bumped their EQ voltage from 15.5 to 16.2?
Perhaps they've been reading the
Rolls Surrette User ManualI thought the Megawatt topped out in the 15.3 to 15.5v range?
To be fair to the T-1275, both detailed reports we have on charging these beasts are from those who got them after they have been worked hard and heavy in a golfcart, then relegated to RV duty whose owners performed lengthy conditioning charges to get some more life from them.
Perhaps they might not fight that last 5% of charge so petulantly when newer and given their 14.8 absorption voltage for as long as needed from the start, as the OP seems to want to try and attempt. But agree on the t-105s being superior, if 232Ah is needed.
The capacity retention of my AGM seems dang impressive since I check all its boxes during most every recharge.
I use a Modified Meanwell rsp-500-15 to recharge it on the grid. 40 amps delivered at any voltage between 13.12 and 19.23.
Never got the spring wound timer for it, but I would choose a 6 hour version. 80 to 100% takes 3.5 hours on my 90AH northstar AGM. A whole 18 AH returned in 3.5 hours with 40 amps available.
But but but.....
This interesting writeup on a Lifeline gpl-31t shows just how long it takes to recharge a battery, even when the charging source holds the proper absorption voltage for a slong as it takes:
http://www.pbase.com/mainecruising/effect_of_charge_rate_on_agm_battery
