The BPSS is the only out-of-the-box solution specifically designed for remote electric lock control where conventional power is impractical or not available. This complete solar power system powers most single-point access control device and fail secure lock (intermittent duty only) by producing sustainable solar and battery operated power. Select the BPSS-10 or BPSS-20 (10 or 20 charging Watts respectively), based on solar activity in the area/region where you’re installing.