More Solar for "Us"
Ok, I went off.the deep end? Bought 3 used 37watt uni-solar panels and a blue sky 2000e controller for the hefty price of $400, They were being listed as 75w panels, they are not The tested open...
Forum Discussion
There's tracking and then there's tracking. I just reviewed the BS2000 manual. The trim pot provides info on the voltage difference between Voc (open circuit voltage) and Vmp (max power voltage). The factory setting is 4.4V. The trim pot can change this setting.
I'm guessing the BS2000 mppt search algorithm measures the open circuit voltage, subtracts 4.4V (or whatever trim pot says) and ASSUMES this is the maximum power voltage. This is a rudimentary search routine.
The manual notes that all panels need to have the same Vmp of this controller to operate effectively. That's due to the simple search routine.
I'm guessing the BS2000 mppt search algorithm measures the open circuit voltage, subtracts 4.4V (or whatever trim pot says) and ASSUMES this is the maximum power voltage. This is a rudimentary search routine.
The manual notes that all panels need to have the same Vmp of this controller to operate effectively. That's due to the simple search routine.
MrWizard wrote:
they track
the MPPT trim pots sets the voltage differential
the point where the voltage gets converted to more amps
i'm guessing that adjusting the circuit properly helps compensate for line loss voltage drops
