Wiring 2 Different size MPPT Controllers

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question

wice22888 asked Feb 2, '24

Hi all

I have 2 Charge controllers

1. Victron Energy SmartSolar MPPT 75V 15 amp 12/24

2. Victron Energy SmartSolar MPPT 100V 20 amp 12/24-V

Do need to connect them to charge one battery.

What will be the best way to wire these controllers without buying some additional buck up solution?

MPPT Controllers

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Answer 1 · 2024-02-03T08:08:58Z

henrik answered · Feb 03 at 08:08 AM

Connect them both directly to the battery

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Answer 2 · 2024-02-03T08:45:53Z

nickdb answered · Feb 03 at 08:45 AM

It is never a good idea to use a battery as a busbar, that is sloppy wiring and opens you to issues.

Connect them via a bus bar and be sure to independently fuse the connections.

You will want to use smart networking, unless you have a GX, to help coordinate charging.

This is all documented in the relevant manuals.

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