SolarWind is a solar powered router project, with which I’ll investigate if it’s possible to run a router 365 days without an external power supply.
Yes, it has been done before, but not at this small scale: Only 20Wp cell plus monitoring circuit to measure energy consumption and earnings.
|Solar Cell||Tievol Solar TF-10-36M 20Wp Monocrystalline Panel
|Monitoring Board||2x Current, 2x Voltage, 1x Temperature
Logs data via serial interface
uses 2x INA138, DS18B20 one-wire temperature sensor, Atmega168, 0.1Ω shunt resistor
see CurrentMonitor link below for schematic
|Charge Controller||CMP12 12/24V 10A “el cheapo” charge controller, 10€|
|Battery||RPower GiV 1250H
12V / 5Ah
|DC-DC Converter||LM2596 based, 75% efficiency (measured), 4€|
|Originally planned router||TP-Link TL-WR703n, 100mA@5V (0.5W), 20€
was fried by human error
|Current router||Carambola1 on it’s devboard, 150-300mA@5V (0.75W-1.5W)|
|Future Router||Carambola2, 0.5W|
|Current configuration||WLAN Client which submits the data to cosm. Currently there’s no practical use apart from measuring data and publishing the results.|