Great info. I could not get the green power module to work at all but then that is not saying much. In the build Solar node for top of tall building using the Waveshare D solar power manager I used 3 x 18650 batteries (protected) and my testing showed that it re-starts after brownout: but from the data over the mesh concerning the voltage level of the device, which has been up 3 months July-September in Munich Germany, that situation (running flat) has not arisen yet probably because of your interesting numbers concerning discharge and time taken to regain the lost power - not much sun required to top up the usage again. Winter will be interesting to see. Your build is beautifully compact. I have not started 3D printing but this might set me off. Your comment about condensation in the box is very right. I have 89% humidity in my node box and am not convinced that is good - despite there being some small holes in the base where cables come in. Next time… Strangely I had problem using a second waveshare D solar power manager with protected batteries and swapped to unprotected. My next project is to try to run a solar node which supports store and forward… i.e. one that drains much more power. I am starting with 3 x 18650 with the T-beam S3 Supreme Core and a larger solar panel… do not expect that to work. It would seem a tall order… and with many brown-outs, which defeats the point of store and forward (it should then be on all the time…).