The SP20-PW is a 20-W photovoltaic power source capable of recharging batteries. Its 15 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 is often used for system configurations that have higher-than-average power requirements, or in higher elevation and latitude locations.