The SP10 is a 10-W photovoltaic power sources capable of recharging batteries. Its 6.1 m (20 ft) cable has stripped and tinned leads that connect to the PS150, PS200, CH150, CH200, or battery base of the CRVW3, CR3000, CR5000, CR7, CR9000X, or CR6. The SP10 has a sufficient charging source for many of our system configurations in tropical to temperate latitudes. It allows unattended operation of systems in remote locations, far from AC electrical sources.