"MPPT 2010 Fangpusun Solarix MPPT 2010 is a  solar charge controller with MaximumPower Point Tracking. It is specially  designed to work with all established module technologies and is optimized for  solar systems with module voltages higher than the battery voltage. The  fangpusun Solarix MPPT 2010 is especially qualified in combination with grid  tied solar modules. The advanced MPPT-tracking algorithm from Fangpusun assures  that the maximum available power of the solar generator is charged to the  batteries. The Fangpusun Solarix MPPT 2010 with latest technology ensures full  performance in all conditions, a professional battery care combined with modern  design and excellent protection. " http://www.fangpusun.com/