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nedim666 avatar image
nedim666 asked

Two MPPT 150/35 in parallel?

I have one solar grid, would like to feed two battery banks, can I split it from the input side to control two battery banks with two MPPT controllers? Thanks.

MPPT Controllers
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1 Answer
Kevin Windrem avatar image
Kevin Windrem answered ·

No, the two MPPT controller will fight each other as they attempt to find the maximum power transfer point.

If you can't split the solar array, you'll need a DC-DC charger from one battery bank to the other.

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nedim666 avatar image nedim666 commented ·
What if I used one controller? and feed both battery banks?


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nedim666 avatar image nedim666 nedim666 commented ·
Just FYI, only want 11 amps or so for each bank. Not too much.


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kevgermany avatar image kevgermany ♦♦ nedim666 commented ·
If the banks have the same battery type and are wired for the same voltage, yes. Otherwise you need to go with @Kevin Windrem solution.
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nedim666 avatar image nedim666 kevgermany ♦♦ commented ·
identical banks... so use one controller split at outpult. :) gracias. cheaper that way too...


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