Reply to: Does it make sense to power battery sensors in the home with harvested energy?

The calculation clarified things a lot, thanks. I built the one by the window with a 0.5 W panel + 1 F supercap + BQ25570, it’s been two weeks without a battery, supercap_v doesn’t drop below 3.9 at night. On the others I switched to NTP + hourly batch sending, and the slope of battery_v fell from 25 mV per day to 6 mV per day. I buried the idea of the beehive and the washing machine 🙂