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I seem to have fixed this by discharging the battery for a little while to reduce the voltage. Now the SCC is able to be powered, and the solar can start charging. This suggests to me the SCC will never let the battery get over 12.6v which could be a problem for a deep cycle battery, but at...

Link to SCC here: https://www.ebay.co.uk/itm/174633248068 I was not using the Buck when getting 12.6V warning. I only used the Buck to test the SCC with an 18V Li battery, but the SCC did not indicate any charging. I assume a 12V battery should not get a warning of above 12.6V. The battery is...

Bud, Thanks for the reply. The charge controller is a simple product from eBay. I'm not sure what other information is relevant. Picture attached. The buck converter was just inserted into the circuit, positive to positive, negative to negative. I'm very much the beginner! I could share photos...

I am connecting a new 12v leisure battery to a new Sunix solar controller. The controller flashes a warning and displays 12.6v, so it seems to be too high. How would I reduce the voltage? Previously I used a Buck converter to step the voltage down from an 18v drill battery, but the solar would...