The Ultimate Photovoltaic Charge Controller... Solar Boost? 2000E is a 12 volt 25 amp fully automatic, very high performance Maximum Power Point Tracking (MPPT) photovoltaic (PV) charge controller. Through the use of patented MPPT technology, Solar Boost 2000E can increase charge current up to 30% or more. A high accuracy digital display is also provided to monitor PV charge performance. The controller is fully protected against voltage transients, reverse polarity, and overload conditions. SB2000E