Quantity   Component name
2 × ESP32 Probably will use different manufacturers: Sparkfun Thing, Adafruit, Heltec, etc.
2 × 3.5VDC 250mA 0.9Watt Solar Panel Standard Epoxy Polycrystalline Silicon The voltage is important, to stay in the right range of the hybrid supercaps
2 × 220F hybrid supercapacitors https://www.eaton.com/content/dam/eaton/products/electronic-components/resources/data-sheet/eaton-supercapacitor-hybrid-cylindrical-cells-data-sheet.pdf
2 × 10K or so resistors Connect the power system to the ESP32 ADC so it can self monitor and manage deep sleep modes
2 × BMP280 Bosch temperature and pressure sensor, to simulate dual use as IoT data collector and computation node
2 × Schottky diode Prevent the voltage accumulated in the hybrid supercap from flowing back into the panel
2 × Adafruit SPI Non-Volatile FRAM Breakout - 4 Mbit / 512 KBytes F-RAM uses a lot less power than Flash RAM with century scale persistence