Streamlight's SolarStream is a supplemental solar charging panel for emergency responder vehicles. It helps to offset battery drain from computer systems and other rechargeable electronics when a vehicle is off, extending battery life. A thin-film amorphous silicon charging panel, the Streamlight SolarStream adheres to a variety of contoured surfaces. It maintains a trickle charge to the vehicle battery even in low sun and cloudy conditions, and is both heat and shade tolerant. The Streamlight SolarStream comes with a 5-year limited warranty and has an MSRP of $400.