Hi,
We have a fully open-source energy management platform that runs on Raspian called SolarNetwork. It involves low-cost, low-power SBCs acquiring data from a variety of solar inverter hardware, charge controllers, kwH meters, plus a bunch of different web services, and then storing this data on a cloud server for beautiful and fast visualisation and analysis. We think it is pretty cool! If there are any Banana Pi enthusiasts who are interested in Linux, Java and OSGi please check it out, we’d love to see some Banana SolarNodes out there showing how much solar power is being generated or power saved around the world.
Thanks, John