Single 12v Panel capable of Charging 24v battery array MPPT 75

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darren-1 asked Sep 6, '22

Single 12v Panel capable of Charging 24v battery array MPPT 75

Hi

I have had a supplier incorrectly supply solar panels that are 12v and its impossible to return them as we remote.

Specs: 140w

Open circuit: 22.68V

Optimal operation: 18.90v

Short Circuit: 8.00A

Optimal Operation: 7.41A

Will a single panel charge 24v 24ah (2x 12v 24ah "gels" in series)

Using a Victron MPPT 75 | 15 (NO BT)

MPPT Controllers battery charging charge current limit charge controller compatibility solar sizing

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Answer 1 · 2022-09-06T20:49:30Z

wkirby answered · Sep 06, 2022 at 08:49 PM

How many of these 12V solar panels do you have?
If you have more than one then you can connect the panels in series also which will double their Voltage to the controller.
If you only have one panel then it will not work.

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darren-1 commented · Sep 06, 2022 at 09:05 PM

1 panel

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kevgermany ♦♦ darren-1 commented · Sep 06, 2022 at 09:52 PM

To add. MPPT will only start charging when panel voltage is more than 5V above battery. So if your system is at 26V, you need more than 31V from the panels.

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