12V Waterproof Solar Battery Maintainer - 20W Monocrystalline Panel with MPPT Charge Controller

Smart MPPT Technology - Crafted with SUNER POWER's unique Smart MPPT technology, our 12-volt solar panel battery charger features premium and durable materials for its MPPT charge controller and solar panel. This innovative technology delivers high tracking efficiency of up to 99% and peak conversion efficiency of 98%, improving utilization by 20%-30% over competitors.

Improved 3-Stage Charging - The improved 3-stages charging algorithm (Bulk, Absorption, Float) effectively charges 12-volt batteries, ensuring safe recharging and enhanced battery life and performance. The charger automatically cuts off when fully charged and resumes charging when needed, providing hassle-free maintenance.

Full Safety Protections - Multiple built-in protections, including over-charge, over-discharge, over-voltage, over-current, over-load, short circuit, reverse polarity, and over-temperature, waterproofing, and spark-proof design, fully protect the battery.

Adjustable Pole Mount Bracket - The adjustable pole mount bracket allows for easy angle adjustment from 0-15-30-45-60 degrees to suit personal requirements. Designed for pole diameters of 1.5-3.0 inches/40-80MM.

Wide Compatibility - Not just a trickle charger but an advanced solar battery charger maintainer, suitable for a range of 12-volt batteries including sealed lead-acid, car, automotive, marine, RV, powersport, boat, dump trailer, gate opener, fence, and deep-cycle batteries, including flooded, gel, AGM, SLA, maintenance-free, and LFP lithium batteries.

Superior Quality and Material - Made with premium Grade A+ solar cells, offering efficiency up to 21%-30%, and a tempered solar glass and durable corrosion-resistant aluminum frame. The charger withstands extreme weather conditions, including UV, anti-rust, and erosion, with up to 2400Pa wind pressure and 5400Pa snow load.

Easy to Use - Using the most advanced MPPT charge controller chip, the charger starts immediately when registered. Pre-dilled holes on the solar panel frame for quick mounting with included adjustable pole mount brackets, and all cables are plug and play, offering an easy and quick user experience.