20W 12V Solar Panel Battery Charger, Solar Battery Trickle Charger Maintainer with Intelligent MPPT Controller and Adjustable Mount Bracket, IP67 Waterproof for Car Boat RV Motorcycle Trailer Smart Charging Controller Built to Last Easy to Connect Wide Applications High Compatibility Higher Conversion Efficiency Compatible Battery Voltage: 12V,Solar Panel Dimensions: 14.7 x 14.57 x 0.79 in / 373 x 370 x 20 mm,Maximum Power: 20W,Solar Cell: Monocrystalline Silicon,Waterproof Rating: IP67,Controller Type: External MPPT Controller,Item Model Number: 20W,Surface Material: High-Transparency Tempered Glass,Max Power Voltage: 20V,Net Weight: 3.46 lbs / 1.57 kg