60 Cell Panel vs 24v Bank MPPT and PWM UPDATE
UPDATE--results with MPPT posted 1 June. Got a chance to run this test today with no clouds but a slight haze up high so not quite 1000 insolation, showed as 8.93Isc vs rated 9.0, however that did ...
Forum Discussion
How do you know the controller is in mppt mode and not pwm? In pwm mode the controller has at least 1V drop.
You could measure that drop. Put negative voltmeter lead on controller positive out terminal, and put positive lead on controller positive in terminal.
You could measure that drop. Put negative voltmeter lead on controller positive out terminal, and put positive lead on controller positive in terminal.
BFL13 wrote:
By now battery holding at 25.6v ready to start, so connected array
I measured Vmp at the controller array terminals and took battery voltage and amps from the controller's display. I did not note the times, but the whole thing took under an hour since the batts were near full going in. Controller was in Bulk and doing MPPT-- So here is how it went with Vmp, V batt, Amps, output watts
29.0, 26.3, 6.0
29.8, 27.4, 5.01, 138
30.1, 27.7, 3.52
30.4, 28.7, 4.64
30.4, 29.3, 4.81, 142
30.7, 29.9, 4.66
31.0, 30.2, 4.52
31.1, 30.3, 4.04, 137
