xw-mppt60 vs array voltage
Hi all, I have an xw-mppt60 charge controller that I am hooking up to a 12 volt battery bank. I can't find if the array voltage will be more efficient at a higher or lower voltages with this unit in the manual. My two choices are to hook four 11 amp panels in series at 80 volts or series parallel at 40 volts and 22 amps. Which will give me the best efficiency or does it make any difference. The combiner already exists so I can use either 1 or 2 breakers. The wiring distances to the panels from the combiner are within 15-20 feet and the panels have 10 ga wiring with MC connectors.