Originally from ticket #1181.
Compatible solar devices? I have seen this posted in the user manual and website, but i can not find what "Compatible" means for you. What are the power requirements that the fredom needs, that a solar charger would have to meet.
A compatible solar charger would be one that has a micro-usb-b cable. It needs to be able to provide 4.5V-6V at 50-1000mA. For the best results you will want a charger that can provide 5v at 500-1000mA, in sunny conditions. Overcast a low electrical current can make for a charge time of days.