Charge controller recommendations
I have a small solar charging system consisting of two 12v 75w panels wired in series and a failing cheap MPPT charge controller. I may be acquiring another identical panel too. I'm currently leanin...
Forum Discussion
Salvo wrote:
That doesn't sound right. You mentioned Voc = 21V. Connect two panels in series and you get 42V, not 12V.
When the panels are configured as 12v, the voc was around 21v. If I configure the panels as 6v, I'm sure the voc would be much lower. In fact, I just found this data sheet that I think is for my panels. It indicates 12v voc of 21.7 and 6v voc of 10.9.
The 2 panels are mounted in a very permanent fashion, It may be worth it to just leave them alone and add a charge controller that's compatible and can still accommodate a third one. Not that I want to throw money away, but the only expense in this whole endeavor is the controller and associated hardware.
