particularly solar/outdoor/remote applications. I run ESP32s from super-cheap USBC solar panels with integrated battery/BMS for various measurements, keeps them

particularly solar/outdoor/remote applications. I run ESP32s from super-cheap USBC solar panels with integrated battery/BMS for various measurements, keeps them running 24/7 regardless of weather due to how little they consume. They pop on every 4 minutes, power the sensors, connect to the WiFi network, beep out their data, then go back to sleep. Seeed's ~$6 ESP32C3/C6 boards have onboard BMS for 3.7V cell even, if I didn't prefer the integrated panel/battery method.