This is a little control board for The Tiny Museum which regulates power coming from the solar charge controller, breaks out the i2c for environmental monitoring, breaks out a RJ45 connector to the Tracer solar regulator, and has switchable loads (2× 12V, 1×5V) to control lights or other accessories. All this interfaces with a Raspberry Pi GPIO header (presently plugged into a rather ancient model A) to create a low-power monitoring and control system for the Tiny Museum.