【SMART CHARGING】Built-in intelligent MPPT charge controller chip helps to regulate the whole charging, generating at least 10%-20% more power than competitors. Smart 3-stages of charging algorithm is improved to better charge and maintain battery at a stable level for extended battery life.【FULL PROTECTIONS】Prevent the battery from overcharge, over-voltage, discharge, and short circuit, reversed polarity protection, IP65 waterproof and spark-proof, the battery is fully protected. BEWARE OF SIMILAR CHARGERS WERE SIMPLY INTEGRATED A DIODE INSTEAD OF MPPT CHARGE CONTROLLER, IT WILL NOT PREVENT OVER CHARGE, WILL CAUSE IRREPARABLE DAMAGE TO BATTERY.【EASY TO MONITOR】The LED indicator allows to visually monitor the working status and battery conditions. The charging will be cut off when battery is fully charged and resumed automatically when battery is drained, totally free maintenance.【ROBUST & DURABLE】Made of durable and strong ABS frame instead of PVC fabric, which could withstand high temperature and UV irradiation. The tempered glass help solar cells to stand high wind and load pressure, Windproof and rainproof, well built for years. BEWARE OF CHEAPLY MADE ABS AND FABRIC SOLAR CHARGERS WHICH ARE EASILY DISINTEGRATED BY UV AND MAY CATCH FIRE.【WIDE APPLICATION】Safely used as a solar trickle charger and maintainer for different 12V DC batteries including Wet Gel Cell, Deep Cycle,Flooded, Maintenance-free, AGM, Seal Lead Acid and LiFePO4 Lithium Battery. A variety of scenarios for car, boat, RV, trailer, marine, camper, lawnmower, motorcycle, jet ski, water pump, tractors, etc. Product Description Sun Energise 20W 12V Solar Battery Charger What does the meaning of the LED indicator light status? The LED indicator allows to clearly monitor working status: Blink Green: Sunshine is effective (Not Active yet); Blink Red: Working to charge the battery (Activated); Solid Green: Battery is fully charged; Solid Red: Error-Reversed polarity. What types of 12V batteries it can charge and maintain? The 12volt solar battery charger is compatiale with multiple 12V battery such as flooded, gel, AGM, SLA, VRLA, lithium-ion battery. Why there is No current (Amp) or DC Voltage out of the solar panel? Our solar battery charger maintainer was built-in intelligent MPPT charge controller chip and improved 3 stages of charging, there is no way to test any output when it is inactive, this is the reason why you got zero voltage reading. Do I need to disconnect the 20w 12v solar charger while the car is driving? You don't need to disconnect. This solar trickle charger pro was built-in full protections, it would be fine to remain it hooked up while driving. Have two batteries in my boat, can I use solar charger for both? Yes, you can use solar battery maintainer for both two batteries in your boat. It was desinged to charge 12V battery, so if your 2 batteries are 6V, make sure they are in series; if the 2 batteries are 12V, make sure they are in parallel. Sun Energise Solar Battery Charger Maintainer Maximum Power 20W 10W 13W 10W 20W Maximum Power Voltage 18V 18V 18V 18V 18V Maximum Power Current 1.12A 0.56A 0.72A 0.56A 1.12A Open Circuit Voltage 21.6V 21.6V 21.6V 21.6V 21.6V Solar Cell Monocrystalline Polycrystalline Monocrystalline Monocrystalline Monocrystalline Charge Controller MPPT Charge Controller MPPT Charge Controller MPPT Charge Controller MPPT Charge Controller MPPT Charge Controller Waterproof Grade IP65 IP65 IP65 IP65 IP65 Dimensions 20.1 x 13.8 x 0.7 Inch 17 x 9.8 x 1.77inch 17 x 9.8 x 1.77inch 15.1 x 9.1 x 0.15 Inch 16.1 x 13.4 x 0.15 Inch Weight 4.5 lbs 3 lbs 3 lbs 2 lbs 2.65 lbs Battery Type Wet, Gel, Flooded, Sealed Wet, Gel, Flooded, Sealed Wet, Gel, Flooded, Sealed Wet, Gel, Flooded, Sealed Wet, Gel, Flooded, Sealed Battery Type AGM, Lithium LiFePO4 Battery AGM, Lithium LiFePO4 Battery AGM, Lithium LiFePO4 Battery AGM, Lithium LiFePO4 Battery AGM, Lithium LiFePO4 Battery Track Page Views WithAuctiva's Counter