pianotuna wrote:
CA Traveler,
What is the additional cost on the PWM system over the MPPT?
Additional mounting brackets and wiring. Combiner box, larger wires and disconnect to the controller. But there are of course many variations.
For my 3 panels the serial wiring is minimized, bypass diodes allow power generation with shade. Other factors would favor MPPT for me even with less than my $100 additional PWM cost.
Another big cost factor is panel shipping costs which are very high due to panel size. I pre planned that and picked mine up driving an additional 30 miles.