12v MPPT and 24v MPPT vs 24v PWM Test
Got a chance to try out comparing amps to the battery using MPPT vs PWM on a 24v battery bank and comparing those with the usual MPPT on 12v with my 230w panel. The bank is four 6s, so it was easy ...
Forum Discussion
pigman1 wrote:
What was your wire size and length, panels to controller and controller to battery?
It was the same for all the tests. My regular set-up stayed the same for the tests with the 230w panel out on its contraption ( twirls and tilts) about 40 ft (one way) of various wires mostly jumper cables #2 cu-al and some #8 cu to controller. I have measured 29.3 at panel (rated 30Vmp) and 29 at controller, so it has about 1% loss when amps on that path are near rated Imp of 7.7
Controller to battery is about two foot each of #8, same in both controller cases above.
I posted a test of the efficiency of the Eco-Worthy MPPT recently doing the 230w panel on 12v batts. It came out in the mid-high 90s same as other MPPT controllers like Morningstar in 24-12 mode. (see the graphs on the Morningstar site)
I have not measured the efficiency of the Solar30, but it can't be bad the way it gets the amps out doing 12-12 or 24-24 as seen here.
