Charge Controller Troubleshooting - Overcharging

[Ouchiebouchie]

Hi, I’ve been using a Wanderer 30A-Li CC for a month now with success.

Yesterday the battery light began fast flashing, indicating “battery overcharged”.

However when I take a reading at the battery terminals with a volt meter it reads “12.5V” which seems a safe figure to find, and doesn’t square with it being overcharged.

I’m wondering if I may have a fault in the charge reader, and how to troubleshoot from here?
Thanks.

—30A Wanderer CC
—105 Ah 12 Gel Deep Cycle Battery
—2 x 100W Solar Panels

 

[sunshine_eggo]

12.5V is a long way from "battery overcharged."

Check all settings and if nothing appears out of sorts, contact Renogy tech support... good luck.

 

[time2roll]

Tell more about this battery light.

 

[HRTKD]

How do you have the solar panels wired? Series or parallel? That solar charge controller has Max PV Input Voltage of 25 volts.

 

[Crowz]

Does seem to indicate over voltage.

Found this in the manual.

 

[Crowz]

Manual also says this :

Battery is over-voltage

Use a multi-meter to check the voltage of the battery. Make
sure the battery voltage is not exceeding the rated specification
of the charge controller. Disconnect battery

 

[Crowz]

Specs for it are :

 

[Bud Martin]

Make sure to disconnect the panels first before disconnecting the battery unless you are doing that at night time.