Mex's 20% AGM Rule Sucks.
Mex says deep cycle AGMs need to be recharged at a 20% of Bank AH rate even if they are not Lifelines (which do specify that). My AGMs are not that brand, and no mention is made of a minimum charg...
Forum Discussion
Most solar panels say to not concentrate sunlight upon them.
I laid some reflectix on the ground in front of my 100 watt portable and got 14 more watts output, from 72 to 86. Not an insignificant increase.
I think those with AGMs should simply have the means to hit 20% or higher every so often, not necessaruly hit that mark every single recharge.
but the deeper the discharge and the more 50 to 90's accumulated, I would prefer to amp hammer mine from a well depleted state, and i am not afraid to go well below 50%, as long as I can start those high amps without letting the battery sit that low for any amount of time.
My TPPL agm responds so well to the high amp recharge from a well depleted state that when I notice performance loss I intentionally drain it deeper just so that I can hit it with higher amps for longer. Odyssey AGM reconditioning procedure is to drain it to 10 volts under a high amp load and then apply no less than 40% at the 10 hour rate, until 14.7 is reached and amps taper to near zero, then repeat.
That brick wall on the amperage tends to get less too. When new the battery would brick wall at 0.0x amps, a year ago it would brick wall at 0.1 amp, now that is at the 0.28 amp area, and many solar only recharges will have it brickwall at the 0.4 amp range.
0.4a @ 14.7 brick wall indicates to me it is time for a well below 50% discharge and 65 amps applied until 14.7 is held, and 14,7 held until new brick wall established, back in the 0.2 to 0.3 range.
Your battery will be different.
Observations will indicate what it responds best to. Mine likes high amps, and I like feeding them to it, because I can.
the 13.6 overnight applied at 35Ah from full still requires several hours of absorption via sunlight the next day, and does not improve performance on my battery.
Seems 13.6v for a week has my battery perform badly thereafter until it gets the high amp recharge from well depleted state.
I laid some reflectix on the ground in front of my 100 watt portable and got 14 more watts output, from 72 to 86. Not an insignificant increase.
I think those with AGMs should simply have the means to hit 20% or higher every so often, not necessaruly hit that mark every single recharge.
but the deeper the discharge and the more 50 to 90's accumulated, I would prefer to amp hammer mine from a well depleted state, and i am not afraid to go well below 50%, as long as I can start those high amps without letting the battery sit that low for any amount of time.
My TPPL agm responds so well to the high amp recharge from a well depleted state that when I notice performance loss I intentionally drain it deeper just so that I can hit it with higher amps for longer. Odyssey AGM reconditioning procedure is to drain it to 10 volts under a high amp load and then apply no less than 40% at the 10 hour rate, until 14.7 is reached and amps taper to near zero, then repeat.
That brick wall on the amperage tends to get less too. When new the battery would brick wall at 0.0x amps, a year ago it would brick wall at 0.1 amp, now that is at the 0.28 amp area, and many solar only recharges will have it brickwall at the 0.4 amp range.
0.4a @ 14.7 brick wall indicates to me it is time for a well below 50% discharge and 65 amps applied until 14.7 is held, and 14,7 held until new brick wall established, back in the 0.2 to 0.3 range.
Your battery will be different.
Observations will indicate what it responds best to. Mine likes high amps, and I like feeding them to it, because I can.
the 13.6 overnight applied at 35Ah from full still requires several hours of absorption via sunlight the next day, and does not improve performance on my battery.
Seems 13.6v for a week has my battery perform badly thereafter until it gets the high amp recharge from well depleted state.
