After changing my century deep cycle
AGM batteries 2 times in 12 months looking for possible causes.
Here are some facts.
2 x 105 AMP Deep cycle in paralell.
I didn't deep discarge more than twice. Mostly 10 or 30% max. before dieing.
Most of time on charger - Projecta 7 stage intelligent 10Amp charger.
Nevara - Relay linked to starter battery.
Both times they died after driving more than 4 - 5 days 6 hrs long distances.
Solar panels 400 Watt charges upto 20 Amps for 12V fridge
Fridge current draw - 12 Hours = 6 to 8 Amps over night.
TV / Antenna - with geni or on "invertor" only 3 hours absolute max ever a few times. TV energy rating 4.5 stars it's a small TV.
Water pump - 5 to 9 amps.
NO SHORTS OR LEAKS - Reading with nothing running 0.1 Amp!
One morning I awake seeing regulator alarm had gone off WHAT THE!
The solar regulator had cut off the power at 11.4V the setting I have programed not to wreck the
batteries!
Also reading a use of 25Amps of and battery Voltage minium of 8.8V that night.
POSSIBLE CAUSES
1.
Batteries
2. Charger
3. Relay
4. Solar regulator
5. Over use - I am ruling that out knowing full
well they have had little use.
Could 2, 3 or 4 be overcharging
batteries?
2. Charger is only 10Amps but
batteries are quickly full, with little use.
3. Relay - Nevara charges upto 16v my vans Altinator 30Amps. Merc sprinter. I have seen 15V in display.
4. Solar is a Plasmatronic
Dingo 40/40