Looking around for reasonable MPPT Charge Controller.

1. From Amazon : MPPSolar from Taiwan PCM2012/3012

2. From TaoBao : MPPT 太阳能控制器 5A DC-DC 数显 降压模块 

3. From eBay : 20A-MPPT-solar-charge-controller

Battery is fine

For some reason. The consumption is greater then supply from the solar panel. After charging battery without connecting load, battery indicator turns green again. The system is up and running now.  I’ve tweak the “on” time for service balcony LED. Let’s see how’s. The consumption balanced up.

One other observation is that the LED will turn on by itself at middle of night. Suspect it is triggered by the cloths hanging in front of the sensor. My presumption is the sensor works only when it senses human heat. May not be the case now.

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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.