I friend of mine is working on setting up a second site. He is going to set it up running off solar. He is looking for a way, so when the voltage gets to a certain point the RPi will shut down safely. I’m sure their is a few ways do make this happen. Any help would be great.
Depending on how much power the solar panel can produce and how much a pi needs to run, you could put a lead acid battery in there and maybe run all night.
a few ‘if’s’ there though, get a crappy day and you might need your auto shutdown any way. Or if you get very little night traffic might not be worth it.
Some solar charge controller/regulators have a battery voltage detection system that will disconnect the load (in this case the Pi) when the battery drops to a certain level. More expensive ones are programmable and allow you to set the charge, disconnect, reconnect voltages and more. It all comes down to price I suppose.
I was looking at this setup from Voltaic systems to power a piaware and a cellular mifi on a remote mountain top. Anyone used this setup, or anyone been successful setting one up?