HI guys,
Iv being surfing around the net for quite some time trying to find out if its possible to charge a 3S 10A 18650 Battery Pack (custom made from old laptop batteries) using a solar panel plugged in to the BMS board directly. This is to power my DIY Arduino weather station.
I have setup a small test module (wires are everywhere!!) which had 2 different charge controllers and direct connection to BMS Board. The first one was connected to a Genasun 12V4A MPPT Charge controller the 2nd one to the Drok MPPT CHarge controller and the 3rd one was plugged in directly with a diode to prevent any charge going back to the solar panel.
Now for the result with 3 hours of sunlight with a 18V 4W (but actually 2.5W [cheap soalr panel]):
-The first setup with the Genasun MPPT C/C I got 6W after 3 hours of sunlight.
-The second, I got 2W from the Drok MPPT C/C
-With the direct connection i got 10W.
So the conclusion is that obviously the direct connection is giving more power, however, is it possible to charge the battery with BMS board directly ?
