I am planning on boondocking on my RV and am in the phase of designing the system and want to stay at 12 V. I have found the perfect solar panels for it, but the specs make them somewhat odd to wire:

Quantity: 4 panels
Rated Power (Pmax): 200 W
Voltage at Pmax (Vmp): 63.8V
Current at Pmax (Imp): 3.2A
Short-circuit current (Isc): 4.1 A
Open-circuit voltage (Voc): 96.0 V

I have two 12 V, 200 Ah LiFePO4 batteries in parallel to run my 12 V inverter. To stay in budget I was thinking if it would be OK to have the battery bank wired in series and parallel at same time so I can discharge them at 12 V and charge them at 24 V to increase the power I can run on the same charge controller.

Edit: Something like this example but I think they are charging at 36v a battery bank of 72v enter image description here

  • \$\begingroup\$ You can't wire in series and parallel at the same time - it's not possible. \$\endgroup\$
    – user253751
    Nov 24, 2022 at 17:25
  • \$\begingroup\$ What is your question? \$\endgroup\$
    – Andy aka
    Nov 24, 2022 at 17:40
  • \$\begingroup\$ What is boondocking? \$\endgroup\$
    – jonathanjo
    Nov 24, 2022 at 19:13
  • \$\begingroup\$ Just get a 24V inverter. \$\endgroup\$
    – user16324
    Nov 24, 2022 at 19:17
  • \$\begingroup\$ boondocking is when you camp with your rv without connections like water or electricity \$\endgroup\$
    – vcliment89
    Nov 25, 2022 at 3:30

1 Answer 1


The charge controller on my RV senses the battery voltage upon connection.

And is rated at both 12 and 24V source.

Victron MPPT 75/15


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