scrubjaysnest
Solar Enthusiast
1 thing I'm considering is set the battery bank up as 24 volt. Means buying a different inverter and dc to dc converter for a few 12V items like the water pump.In our area rated Voc of 80V or less will be fine on a 100V controller, but at 14.4V, 2S may be a little more efficient if you don't have long PV wire runs.
The 100/20 will limit output to 20A regardless of panel configuration. You simply don't want to exceed the PV input current limit and Voc published in the datasheet.
Move the 12V inverter to the RV for the microwave.
Voc for the new panels is 21.8, round it to 22 and 3 panels is 66 volts in series.
The older 12 volt panels have Voc around 20 volts. And the 2 240 watt Trina panels are about 37 for Voc so a 24 volt bank may be a better choice.
Some will say just goto 48 and be done. That's what White Mountain Solar is suggesting.