Hello,
I purchased a class A motorhome with an existing Solar and Inverter system, but no effective battery bank. The house batteries are connected but they are about 15 feet away and using a 4awg wire, so they can run the AC refrigerator but not much more.
I am finally ready to install some12v 100 Ah LiFePo4 batteries (2p) but I wanted to see if anyone had any thoughts or pointers before getting started.
The wiring diagram is attached , hopefully it makes sense. Cable lengths are in the table. (Solar cable from MPPT should be 3’, not 5). I didn’t draw the negative cables exiting the Lynx power in because it got crowded, but rest assured they will be installed in real life. This battery bank would be isolated from the existing house battery bank and alternator.
I would like to add 2 more 12v batteries in another year as fund’s permit. this would give me 4 parellel batteries at 12v, 400 Ah, 400 amp max continuous current….correct? I would also upgrade the T class fuse to 500 amps.
I didn’t include a shut off switch, not sure how much I would use it vs just unbolting the T fuse. If I were to use one, I would use the Blue Sea heavy duty switch rated at 600amps continuous load. Thoughts?
could I add another 4p 12v battery bank at some time in the future? This would have its own T series fuse, shunt, and equal length cables the first battery bank. It would attach to the opposite side of the lynx power in.
To be honest, a 12v 400 or 800 amp system seems a little scary. I would much prefer a 24v or 48v system, but the Victron Multiplus that are already installed are 12v. Not much I can do about that other than start over fresh.
thanks for looking!
I purchased a class A motorhome with an existing Solar and Inverter system, but no effective battery bank. The house batteries are connected but they are about 15 feet away and using a 4awg wire, so they can run the AC refrigerator but not much more.
I am finally ready to install some12v 100 Ah LiFePo4 batteries (2p) but I wanted to see if anyone had any thoughts or pointers before getting started.
The wiring diagram is attached , hopefully it makes sense. Cable lengths are in the table. (Solar cable from MPPT should be 3’, not 5). I didn’t draw the negative cables exiting the Lynx power in because it got crowded, but rest assured they will be installed in real life. This battery bank would be isolated from the existing house battery bank and alternator.
I would like to add 2 more 12v batteries in another year as fund’s permit. this would give me 4 parellel batteries at 12v, 400 Ah, 400 amp max continuous current….correct? I would also upgrade the T class fuse to 500 amps.
I didn’t include a shut off switch, not sure how much I would use it vs just unbolting the T fuse. If I were to use one, I would use the Blue Sea heavy duty switch rated at 600amps continuous load. Thoughts?
could I add another 4p 12v battery bank at some time in the future? This would have its own T series fuse, shunt, and equal length cables the first battery bank. It would attach to the opposite side of the lynx power in.
To be honest, a 12v 400 or 800 amp system seems a little scary. I would much prefer a 24v or 48v system, but the Victron Multiplus that are already installed are 12v. Not much I can do about that other than start over fresh.
thanks for looking!