Efficient Battery Charging — Our 15W 12V solar battery charger combines A+ high-efficiency monocrystalline cells, low-iron tempered glass, and a smart controller to deliver up to 20–30% module efficiency and consistently faster charging, helping your battery replenish power quickly Wide 12V Compatibility — Fully automatic, maintenance-free smart 12V solar charger works with LiFePO₄ , AGM, SLA, GEL, FLA, EFB, MF batteries and selected Li-ion where supported, ideal for trailers, tractors, trucks, boats, motorcycles, RVs, cars, lawn mowers, water pumps, and electric fences—keeping parked equipment topped off and preventing battery drain during storage For 12V systems only 3-Stage Visible Charging — Stay topped off safely without babysitting A built-in intelligent chip auto-switches Bulk → Absorption → Maintenance—fast fill, then gentle maintenance Three status LEDs show the stage at a glance, while 6-in-1 protections—anti-backflow (reverse current), over-charge, over-voltage, over-current, short-circuit, over-temperature—keep charging safe and help extend battery life All-Weather Durability — Stable output in extreme conditions Full-potting and IP68 weather sealing prevent moisture ingress and protect the electronics, delivering steady current from 14°F to 158°F (-10°C to 70°C) Low-iron tempered glass with a corrosion- and rust-resistant aluminum frame is built for long outdoor use—rated up to 2400 Pa wind and 5400 Pa snow, with corner guards to help absorb bumps for added drop resistance Easy To Install & Angle Adjustable — All-in-one panel-controller design with plug-and-play alligator clips and O-rings comes ready to use out of the box UV-resistant 100% OFC 18AWG SAE lead with protective cap reduces line loss and resists sun; the included 360° swivel mount lets you aim at the sun to maximize daily solar intake Complete Kit & 24/7 Support — What’s in the box: solar panel ×2; charge controller ×2; 360° swivel mount ×2; alligator clip cable ×2; O-rings ×2; mounting hardware kit ×2; backed by 24/7 customer support and a 365-day warranty 30W Smart Solar Battery Charger Maintainer, 2PCS 15W 12V Waterproof Solar Panel Trickle Charger for Car Battery, Motorcycle, Boat, Marine, RV, Dump Trailer, Tractor,Truck