connecting 2 different sized mppt charge controllers connected to 1 single cable coming from parallel connected solar panels

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question

ers asked Mar 19, '21

how efficient would it be to connect 2 different sized mppt charge controllers connected to 1 single cable coming from parallel connected solar panels ? to be clear: one cable will come from solar panels (6 panels) and will be connected to 2 seperate mppt charge controllers in parallel (the 1 combined cable carrying all 6 panel currents). the reason i’m asking is 1) 1 mppt controller is not big enough to handle all parallel connected panels 2) i already have one cable run through from panels, i don’t want to run another cable from the panels and want to keep only one cable if this setup would make sense.

MPPT SmartSolar Solar Panel mppt charging

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Answer 1 · 2021-03-20T00:03:45Z

Guy Stewart (Victron Community Manager) answered · Mar 20, 2021 at 12:03 AM

This is not a supported configuration. You can only connect 1 MPPT per solar array.

You will need to split the panels up so that they are not connected in parallel, and run 2 sets of cables down independently, one for each MPPT.

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Answer 2 · 2021-03-20T13:12:15Z

ers answered · Mar 20, 2021 at 01:12 PM

not supported means can’t be done ? i really don’t want to run another set of cables down to mppt what else i can do?

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seb71 commented · Mar 20, 2021 at 03:12 PM

Don't even try this.

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