I have come up with 4 potential setups and want to know if anyone sees a problem with any of these options. I am also interested if one of these options is better than the others. On all of these, I will be replacing the fuse on the 10g wire from the panels to the controller with a 20 amp or 30 amp fuse, and replacing the fuse on the 12g wire from the controller to the battery with a 20 amp fuse.
1. Keep my PVCM25D controller, which is capable of outputting "25 Amps @ 28V DC." Install a total of three 80 watt panels in parallel.
2. Keep my PVCM25D controller. Install a total of four 80 watt panels with 2 pairs of panels wired in series, and those two series in parallel.
3. Replace my controller with a Renogy Commander 20 amp MPPT controller. Install a total of three 80 watt panels in parallel.
4. Replace my controller with a Renogy Commander 40 amp MPPT controller. Install a total of six 80 watt panels with 3 pairs of panels wired in series and those 3 pairs wired in parallel. I would have to change out the 12g wire from the controller to the batteries with an 8g wire fused at 50 amps.
Like I said above, I am trying to dig into the specifics of exactly how to wire this up now.
