Out of a sudden, the system stops working. With the controller indicating battery problem (blinking).

Check with multimeter shows that battery voltage dropped to 10.5V. Reconnect the battery activate back the system.

Battery is charging during daytime up to 13.2V. Looks healthy during the day. Problem comes when the is load on the system. Battery drain fast. It is not holding the charge.

Battery status indicator is also now “black” instead of “green”. will need to monitor for a couple of days to see is the battery dead.

In good early morning sunlight, the Solar Panel is pushing out 2A of current to the battery.

My system is drawing around 2A of 3 hours every night. Making it 6AH.

I’ve good sunlight for about 4 hours everyday, plus indirect sunlight which I assume 0.5A rate for 4 hours. The system is getting 10AH, should be enough to support my needs.

Looks like battery problem.