Easy to Install & Connect: This solar battery charger comes with a 0°–60° adjustable bracket, M6 screws, and pre-drilled holes for secure long-term installation on ground, walls, boat decks, car roofs, and house rooftops. Includes a 122-inch extension cord and 43. 3-inch. Upgraded MPPT Controller: Built-in intelligent MPPT controller provides multiple protections including overvoltage, overcurrent, short circuit, over-discharge, overcharge, and overheating. The smart 3-stages charging algorithm is improved to better charge and maintain 12v battery, keep it topped off in all seasons.