Can I use the 100v 50a controller for 80v 20a pv?

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john-smith asked Sep 30, '20

Can I use the 100v 50a controller for 80v 20a pv?

My panels will be set up 2s2p for a total output of 80v 20a. I have a 24v battery bank.
Can I use smart solar 100v 50a?

For some reason the calculator is not suggesting it.

MPPT Controllers

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wkirby ♦♦ commented · Sep 30, 2020 at 06:58 AM

How many watts is each panel?

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john-smith wkirby ♦♦ commented · Sep 30, 2020 at 07:05 AM

300 watts.

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Modifications Space

Node Red Space

Answer 1 · 2020-09-30T06:50:40Z

Vance Mitchell answered · Sep 30, 2020 at 06:50 AM

80V x 20A gives a theoretical maximum of 1600w. The 100/50 is recommended for a maximum of 1440w. If you use it with that input you will lose some of your available solar energy.

The numbering on the Victron controller is (PV max voltage)/(Maximum Battery Amps), therefore a 100\50 can accept up to 100v input from the solar and 50A maximum output to the batteries.

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john-smith commented · Sep 30, 2020 at 06:59 AM

The panels are only 300 watts. The max output would be 1200.

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Answer 2 · 2020-09-30T07:06:38Z

wkirby answered · Sep 30, 2020 at 07:06 AM

For a 1200W array in a 2S2P configuration, a 100/50 would be an excellent choice.

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