Victron Energy 20W Solar Panel Low voltage-temperature coefficient enhances high-temperature operation.Exceptional low-light performance and high sensitivity to light across the entire solar spectrum.25-Year limited warranty on power output and performance.5-Year limited warranty on materials and workmanship.Sealed, waterproof, multi-functional junction box gives high level of safety.High performance bypass diodes minimize the power drop caused by shade.Advanced EVA (Ethylene Vinyl Acetate) encapsulation system with triple-layer back sheet meets the most stringent safety requirements for high-voltage operation.A sturdy, anodized aluminium frame allows modules to be easily roof-mounted with a variety of standard mounting systems.Highest quality, high-transmission tempered glass provides enhanced stiffness and impact resistance.High power models with pre-wired quick-connect system with MC4 (PV-ST01) connectors.