question

partenope avatar image
partenope asked

Common wire to connect PV arrays on SmartSolar MPPT RS - 450/100

Good Day,

Is it possible to use a common ground, to connect the 2 arrays PV input for the charge regulator SmartSolar MPPT RS - 450/100?

Because the regulator is far from the panels, and I have only 3 wires from the connection box.

Thanks

wiring
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1 Answer
wkirby avatar image
wkirby answered ·

This would not work:
PV+ and PV- need to be isolated from ground.
Each of the PV trackers need to be isolated from one another, so connecting to ground or sharing PV- would not work.

Much better to run four wires 2x PV+ and 2x PV- and then a ground wire from MPPT chassis to PV frames depending upon your local regulations.

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