acceptance charging rate AGM batteries
Hi all, It is generally thought that acceptance rate for a flooded deep cycle battery is about 12.5 amps per 100 amp-hours of capacity once the bank is at 85% state of charge. I know that accept...
Forum Discussion
Hi Mex,
Alas, I do not have an amp-hour counter. The only one I truly trust is the smartgauge and since I have 2 banks, I would need two of them. I'm resistant to the use of a shunt since I "push" the system HARD, often over 150 amps DC for load support. Cost is beyond the budget. Even with that level of sophistication, readings would have to be taken without the solar system. I think the hybrid load sharing feature of the Magnum would have to be turned off as well.
I've reached the end of my electrical system development except for advanced surge protection.
The mistakes I've made would be costly to mitigate and are not really of much consequence. They are:
1. not having a larger capacity charge controller to allow for expansion of the solar panel harvest.
2. not moving to 48 (or at least 24) volts for the battery bank.
If I wished to "fix" these issues I would have to replace the rather wonderful Magnum inverter charger, and replace the charge controller, while adding a dc to dc converter. To boost solar, I'd have to add a rack that covered the entire roof of the RV and replace the existing heat and shade tolerant panels with a heck of a lot more wattage. A thousand dollars per month for a year would get me there, but on a beer budget it just is not going to happen.
Following that path puts me out on a limb and removes the redundancy that is "built in" to the existing system. At the moment, should the Magnum fail or "dislike" a GFCI outlet, the PD 40 amp converter can simply be plugged in.
I do carry a back up psw inverter in the 1000 watt class.
Alas, I do not have an amp-hour counter. The only one I truly trust is the smartgauge and since I have 2 banks, I would need two of them. I'm resistant to the use of a shunt since I "push" the system HARD, often over 150 amps DC for load support. Cost is beyond the budget. Even with that level of sophistication, readings would have to be taken without the solar system. I think the hybrid load sharing feature of the Magnum would have to be turned off as well.
I've reached the end of my electrical system development except for advanced surge protection.
The mistakes I've made would be costly to mitigate and are not really of much consequence. They are:
1. not having a larger capacity charge controller to allow for expansion of the solar panel harvest.
2. not moving to 48 (or at least 24) volts for the battery bank.
If I wished to "fix" these issues I would have to replace the rather wonderful Magnum inverter charger, and replace the charge controller, while adding a dc to dc converter. To boost solar, I'd have to add a rack that covered the entire roof of the RV and replace the existing heat and shade tolerant panels with a heck of a lot more wattage. A thousand dollars per month for a year would get me there, but on a beer budget it just is not going to happen.
Following that path puts me out on a limb and removes the redundancy that is "built in" to the existing system. At the moment, should the Magnum fail or "dislike" a GFCI outlet, the PD 40 amp converter can simply be plugged in.
I do carry a back up psw inverter in the 1000 watt class.
