Let me be sure I have this in my mind correctly. If so, this will be my plan.
1. Change fuse on 10g wire from panels to controller from 10 amp to 30 amp.
2. Replace 12g wire from controller to batteries with 8g wire fused at 50 amps.
3. Install Grape Zenith 40 amp MPPT controller.
4. Install (in parallel) 2 sets of three of the 80 watt panels wired in series.
5. Put a disconnect switch on the hot wire between the panels and the controller. (I have a spare Blue Sea 300 amp disconnect switch laying around.)
Did I miss anything, or get anything wrong?
After getting this set up, I will be back to ask what the optimal settings are that I will need to program.
red31 wrote:
the mppt versions have current-limiting / 'clipping'. 320w in the summer could yield ~20A
from the zennith manual
? A protection feature called current-limiting mode or "clipping" is activated whenever an oversized solar array is producing power which exceeds the controller's rated output.
Let me be sure that I understand this statement. The controller's rated output is 40 amps and the batteries are 12v, so the rated output is 480 watts. Since 6 of the 80 watt panels is theoretically 480 watts, the clipping should not be an issue, right?
