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Series, parallel or series-parallel for panels of different orientations?

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  • Series, parallel or series-parallel for panels of different orientations?

    Hello- I have 1 HQST 40a MPPT & 4 panels total:

    2 Canadian Solar 400w (52.3 VOC & 9.9 ISC)

    2 REC 370W (44.1 VOC & 10.55 ISC)

    Due to space constraints, I will need to have 2 panels facing West and 2 panels facing South. Being they are facing different orientations, I want to lose the least amount of production. I already know due to the panel types being different, I will lose some production due to VOC dropping to lowest in series or ISC dropping to lowest in parallel. I know that the best way to do this is to have panels of the same orientation on its own MPPT.

    However if I were to want to remain with just the one MPPT what is the next best way to wire these panels? Can I Just parallel all 4 panels together? Thanks for taking the time to read this. Your help is much appreciated, Happy New year!

  • #2
    Not familiar with your charge controller as far as max voltage input. I would put the two strings in parallel and isolate the two REC with an isolation diode because of the lower voltage. I have east facing panels and love them. Power first thing in the morning.

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