VEVOR 20W 12V Solar Panel Battery Charger, Solar Battery Trickle Charger Maintainer with Built-in Controller & 0-60° Adjustable Pole Mount Bracket, IP67 for Gate Fence Farm Lawn (Fit 1.5" - 3" Poles) Smart Charging Controller Built to Last Easy to Connect Wide Applications Higher Conversion Efficiency High Compatibility Compatible Battery Voltage: 12V,Solar Panel Dimensions: 20.5 x 14.57 x 8.46 in / 521 x 370 x 215 mm,Maximum Power: 20W,Solar Cell: Monocrystalline Silicon,Waterproof Rating: IP67,Compatible Pipe Diameter: 1.5 - 3 inch / 40 - 80 mm,Color: White,Controller Type: Built-in Controller,Item Model Number: 20W,Net Weight: 6.6 lbs / 3 kg