The SP10-PW is a 10 W photovoltaic power source capable of recharging batteries. Its 6.1 m (20 ft) cable terminates in a connector that attaches to a Campbell Scientific prewired enclosure. The connector in the enclosure then leads to a power supply or battery base to recharge the battery, allowing unattended operation of systems in remote locations, far from ac electrical sources. This solar panel has a sufficient charging source for many of our system configurations in tropical to temperate latitudes.