I recently upgraded my solar installation and hooked up a Raspberry Pi to a Tracer (epsolar) 3210A charge controller to capture the performance data. Happy to share further details if anyone is interested. This site has 3 x Rockets, 1 x ipCam, and 1 x Raspberry Pi 2 and if the IR night mode of the camera is off, consumes slightly above 1A consistently. the IR takes another .3A :) and I'm glad I was able to quantify that.