I have a MPPT 100/50. the manual says terminals must face down. I have mounted the unit upside down to allow better cable connection to the inverter etc. is this going to be an issue?

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tonka99 asked Dec 11, '20

I have a MPPT 100/50. the manual says terminals must face down. I have mounted the unit upside down to allow better cable connection to the inverter etc. is this going to be an issue?

MPPT Controllers

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Answer 1 · 2020-12-11T13:54:57Z

tonka99 answered · Dec 11, 2020 at 01:54 PM

sorry so the MPPT unit will be mounted vertically but upside.

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Answer 2 · 2020-12-16T00:12:47Z

Daniël Boekel (Victron Energy Staff) answered · Dec 16, 2020 at 12:12 AM

Hi @Tonka99

I've moved your question to the normal ' questions and answers'

Moving upside down is risky: it makes it easy for water to flow into the controller, destroying the controller and possibly putting PV voltage onto the battery output with it (ask me how I know...)

I've seen an installation where water was seeping -trough- the PV cable and entering the MPPT controller, not good...

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klim8skeptic ♦ commented · Dec 16, 2020 at 01:24 AM

Yes, water will "wick" inside the plastic sheath, along the wire strands. Capillary action...

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