Originally Posted by Canibul
Canibul, I'm not the expert with lots of solar
installs under my belt. I'll give you my opinion though. I bought Kyocera
panels for my boat, and genasun gv-10 MPPT
controllers. They are not cheap
, but they are very high quality and great performance. There is some benefit to having an individual controller for each 120-140 W panel. It avoids the mixing issue with different V or I. It avoids the issue of loss of performance of part of the array is shaded. You really have too many panels to do that, but breaking them into groups of like panels and buying
a controller for each group is one option. I can't reference your exact list of panels on this iPhone
, but the first two groups might go parallel to one of the other brands of that accommodate higher output and is more cost effective.
panel with the broken mate could go to a genasun - or a cheapie, but you may find enough increase in performance that an MPPT like genasun's makes sense. I think you could easily sell it if you did not see enough increase, and even compare with a basic morningstar non MPPT and see what your battery monitor
says. Might hook the broken one up for laughs and just see what the output is.
Do you have a bus bar setup near your batteries? Your controllers can be mounted at the end of the wires from the panels, with properly sized wire to a common bus bar. All of your charging
sources can terminate there with one cable leading to your bank.
Sure enough, look at the blue sea, Morningstar, genasun, and solar power sites and compare controllers. I think whatever MPPT you get will be pricey, and it's debatable whether it is worth the investment with that group of panels. Personally I would really want to compare on the battery monitor
, and easy enough to wire one for a few sunny days, then the other.
As far as the high voltage panels requiring an MPPT, I wasn't aware of that. I understand that they take advantage of high voltage, but I thought that other types of controllers could regulate them too. There is no doubt some clever way to do this without breaking the bank. Hopefully someone with a larger mixed array, or even a menagerie like yours will chime in.
Good luck with your project