AGM Maintenance Questions
I've replaced the OEM batteries (looked more like starter batteries then deep cycle) in our new fifth wheel with Trojan T-105 AGM batteries (4 each in 2 12 volt banks so voltages below are 2 in series...
Forum Discussion
The temperature probe is just to adjust the charging voltage set on the charger. It does not protect from heat.
"Conditioning" is like equalizing--a rare need with AGMs and it is done at more like 15.5v. 14.4 will not do anything for that.
Longer time at 13.6 is not the same as time at 14.4. The higher voltage gets the electrolyte into the glass mat (or something like that. Whatever it was that Mex and PT said)
IMO you should forget anything the Trimetric says about percentage or SOC, and just use it as a volt meter, ammeter, and AH counter. Kill the auto reset. Reset the AH when the batts are truly full as measured by them getting down to 0.5/100 at 14.4v.
Never mind how long it takes to get down to that. Once down to that, change to Float voltage, not before.
PS, the whole Trimetric system for determining SOC is unsuitable for AGMs (and IMO for Wets too) You will think they are full and start a new cycle when they are not truly full. Plus whatever you set as your baseline capacity will be wrong, since it changes with temperature and battery condition. AGM (and Wet) capacity drops 15% between 77F/25C and freezing. Do you reset your capacity every six hours every day?
"Conditioning" is like equalizing--a rare need with AGMs and it is done at more like 15.5v. 14.4 will not do anything for that.
Longer time at 13.6 is not the same as time at 14.4. The higher voltage gets the electrolyte into the glass mat (or something like that. Whatever it was that Mex and PT said)
IMO you should forget anything the Trimetric says about percentage or SOC, and just use it as a volt meter, ammeter, and AH counter. Kill the auto reset. Reset the AH when the batts are truly full as measured by them getting down to 0.5/100 at 14.4v.
Never mind how long it takes to get down to that. Once down to that, change to Float voltage, not before.
PS, the whole Trimetric system for determining SOC is unsuitable for AGMs (and IMO for Wets too) You will think they are full and start a new cycle when they are not truly full. Plus whatever you set as your baseline capacity will be wrong, since it changes with temperature and battery condition. AGM (and Wet) capacity drops 15% between 77F/25C and freezing. Do you reset your capacity every six hours every day?
