I now have 3 solar routers running with RAK 19007 and 5W/5W Solar Panel direkt to the wisblock Charging Plug. The first one has been running for 3 months now and has never fallen below 3.65V (1x3200mAh 18650) and the 2 newer ones for about 1 month (2x3200mAh 18650) have never fallen below 3.9V and also charge on a sunny …