In this video, I will start a project to use solar energy to power ESP8266 or Arduino devices during the whole year. We wll answer the following questions: 1. What size the solar panel has to be in order to power our device 2. What size of battery we need to survive times with less or without sun? Links: Solar panels: Solar Panel 165x165mm http://s.click.aliexpress.com/e/f2FybQV Solar Panel 112x84mm http://s.click.aliexpress.com/e/fUrRz7e Solar Panel 53 x 30mm http://bit.ly/2shHVRJ Solar Panel 86 x 38mm http://bit.ly/2szAvwk Solar Panel 107 x 61mm http://bit.ly/2szn7rN Solar Panel 99 x 69mm http://bit.ly/2shEDho Solar Panel 80 x 80mm http://bit.ly/2rCsMsq Solar Panel 540mm x 340mm http://s.click.aliexpress.com/e/c0LoQbja Power Meters: http://bit.ly/2x5rVEm Results: https://docs.google.com/spreadsheets/d/1JIJupnZaRlcYcFGVrvozazKUGn-A0P0HuncRVTjqVE0/edit?usp=sharing https://solargis.com/maps-and-gis-data/download/switzerland http://solarelectricityhandbook.com/solar-irradiance.html https://www.timeanddate.com/sun/switzerland/basel?month=7&year=2017 Supporting Material and Blog Page: http://www.sensorsiot.org/ Github: https://www.github.com/sensorsiot If you want to support the channel and buy from Banggood use this link to start your shopping: https://bit.ly/2jAQEf4 (no additional charges for you) https://www.facebook.com/SensorsIOT/ https://twitter.com/spiessa