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Solar panel doesn’t appear to be charging.


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#1 carpenter29

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Posted 23 October 2018 - 04:21 PM

Hi All,
Another question from me - I have a solar panel that runs through a controller to the battery. It was working fine after installation earlier this year, but now it’s not. Today it was showing on the controller as the panel producing between 10 - 12volt, but no amps going into the battery. A volt metre confirmed the voltage - but I can’t figure out why it isn’t charging the battery.
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#2 splat

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Posted 23 October 2018 - 04:47 PM

What voktage is the battery at when disconnected after an hour or so?
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#3 Battleship

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Posted 23 October 2018 - 04:52 PM

10-12 volts wont charge the battery. Matt will probably chime in with a more detailed answer but if it was me I would disconnect the panel from the controller and check the voltage there to eliminate the controller as a possible cause. I Would expect more voltage than  that. 


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#4 Island Time

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Posted 23 October 2018 - 04:53 PM

if the panel is 10-12 v, and the controller is mppt, then the panel is shaded, has bad connections, or has failed. Take the wires off the controller - open circuit voltage should be over 19v.


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#5 carpenter29

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Posted 23 October 2018 - 04:58 PM

Thanks. It’s an mppt controller. Disconnected from the controller and direct to the multi metre it was still only showing fluctuating between 10 - 12 volts. Do you think the panel is knackered - it wasn’t shaded....

Edited by carpenter29, 23 October 2018 - 04:59 PM.

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#6 carpenter29

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Posted 23 October 2018 - 05:24 PM

IT - is your workshop based in Gulf Harbour?
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#7 Island Time

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Posted 23 October 2018 - 05:44 PM

yep


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#8 splat

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Posted 23 October 2018 - 05:47 PM

IT not all panels have an open circuit voltage higher than 19V.


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#9 Island Time

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Posted 23 October 2018 - 05:50 PM

True, but the vast majority do, and 10-12v disconnected is bad


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#10 funlovincriminal

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Posted 23 October 2018 - 07:31 PM

Is it a flexible panel?

Had three fail in 2 years, gone to glass/alloy.


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