Charging a Battery Bank
I am planning on upgrading my batteries to 4 6v batteries wired in series and parallel to have a 12v system with plenty of Amp Hours. There is a ton of information on how to wire things up but nothing...
Forum Discussion
Last time. The charger is "current limited" (rated at 60 amps say) Not by Ohm's law. The charger cannot do more amps than that if you change its voltage to a higher voltage.
The battery acceptance of amps at any SOC does increase with a higher voltage, that's why they have that 14.4 instead of just 13.6. Once the batts get up to near 14.4 and that charger voltage is held constant, amps will taper.
EDIT--I would rather do a generator recharge every second day (for twice as long) on 4 batts instead of every day on 2 batts. However, if campground gen times are too short for that, it is not an option.
It also depends on whether you can get by every day on just two batts.
(Furnace alone here in Jan/Feb with temps just above freezing, costs me about 100AH a day, so I take 6 batts for that so I can still recharge every second day)
EDIT--at the same charging amps and absorption voltage, if you double the size of the bank, it will take twice as long to recharge it from the same SOC. However, if you double the charging amps, same Vabs, it does not halve the time on the same bank. There is a diminishing return in time from increasing the charging amps.
The battery acceptance of amps at any SOC does increase with a higher voltage, that's why they have that 14.4 instead of just 13.6. Once the batts get up to near 14.4 and that charger voltage is held constant, amps will taper.
EDIT--I would rather do a generator recharge every second day (for twice as long) on 4 batts instead of every day on 2 batts. However, if campground gen times are too short for that, it is not an option.
It also depends on whether you can get by every day on just two batts.
(Furnace alone here in Jan/Feb with temps just above freezing, costs me about 100AH a day, so I take 6 batts for that so I can still recharge every second day)
EDIT--at the same charging amps and absorption voltage, if you double the size of the bank, it will take twice as long to recharge it from the same SOC. However, if you double the charging amps, same Vabs, it does not halve the time on the same bank. There is a diminishing return in time from increasing the charging amps.
