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btaylor avatar image
btaylor asked

MTTP charging issue

609c50ae-0411-49db-8a94-17ef7373dafc.png1aa810ca-426a-4384-becd-73f02d73af86.png

My MPPT solar charger seems a little erratic. In the above screen shot it was bulk charging 3 days ago but no float charge. Two days ago the solar panel voltage was higher but there was no charge. If somebody could tell me what the problem is I will be most grateful. Screen shot of the settings below.


MPPT Controllers
1aa810ca-426a-4384-becd-73f02d73af86.png (186.7 KiB)
609c50ae-0411-49db-8a94-17ef7373dafc.png (118.0 KiB)
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ingo21 avatar image ingo21 commented ·
according to your solar panel pmax and yield it seems not to charge at all or very very little

check your solarpanel and the connections to it



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1 Answer
Alexandra avatar image
Alexandra answered ·

@Btaylor

You pv voltage is barely or not really 5v above battery voltage the mppt will not start up to charge.

But as @Ingo21 mentioned also check for reverse polarity.

What is the VOC of your panel/s?

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