A charge controller sits between a solar panel and a battery and ensures the two 'play nice' together. The Free Charge Controller is an open source project that focuses on allowing DIY hobbyists to build their own MPPT charge controller. MPPT is a tracking program that ensures the solar panel always operates at peak efficiency even though light and energy levels change through the day.
This kit is offered to help developers involved with the Free Charge Controller project - see FreeChargeController.org for more details.
Construction requires advanced electronics training, highly developed soldering skills, an oscilloscope, an adjustable power supply, and additional parts to build.