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john-smith avatar image
john-smith asked

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 avatar image wkirby ♦♦ commented ·

How many watts is each panel?

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john-smith avatar image john-smith wkirby ♦♦ commented ·

300 watts.

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2 Answers
Vance Mitchell avatar image
Vance Mitchell answered ·

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 avatar image john-smith commented ·

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

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wkirby avatar image
wkirby answered ·

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

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