Forum Discussion

albright4's avatar
albright4
Explorer
May 13, 2013

How to hook up my solar

Not sure if I can go series or not?
I have two Uni-solar PVL-124 solar panels and a Morningstar MPPT SS-MPPT-15L controller.
STC rating 124W
Isc 5.1 amp
Voc 42 volt
Vmp 30volt
Imp 4.1 Amp
Controller
Max battery current 15A
Max open circuit voltage 75V
Max PV input 200Wp (12volt battery)
System voltage 12/24

Any help would be great.
Thanks
  • westend's avatar
    westend
    Explorer
    May 14, 2013
    You may exceed the limit of the controller, regarding voltage in series, and that may not be a good thing. Exceeding the power input to the controller by a small amount isn't an issue, the controller will just shut off input until levels lower to what the controller can handle. I have a 235w panel with the MPPT-15 and haven't had any issues. In the real world, with panels flat, power input should not exceed the controller's ability. I would opt for a parallel wiring schema.
  • donn0128's avatar
    donn0128
    Explorer II
    May 13, 2013
    Mount the panels on the roof, run wires from one to the second panel, run wires from panel two to the controller. From the controller run two wires to the battery.

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