Low power ePaper displays
running an esp32 display from battery long term
After experimenting with solar power over the last decade it became obvious that for some applications if you can get the power draw low enough battery power is enough to run that application for potential years. A information display would need some kind of connectivity and I had looked into running an ESP32 with low power a couple of years earlier.
That time I ran into the issue that the LDO I used and that were included in most dev boards ate up about 1mA constantly and that limited the possible runtime for my projects to days on battery power alone.