【Innovative Upgrade MPPT Built-in Controller】Make charging high tracking efficiency and conversion efficiency of up to 99%, The MPPT solar battery charger automatically adjusts the most efficient power to charge the battery according to the sunlight intensity, This is an innovative technology that allows the solar panels to perform better than solar chargers without MPPT controllers even on cloudy days.【Smart Maximum Power Point Tracking】POWOXI-MPPT employs a approach tailored for variable, strategically optimizing energy extraction to adapt seamlessly to changing conditions. This technique ensures the efficient harnessing of solar power, dynamically adjusting to varying environmental to maximize overall energy output.【Comprehensive battery protection】MPPT controllers have a float/maintenance stage to keep batteries charged without overdoing it. This smart feature extends battery life and improves energy efficiency, charge, and maintains different 12V batteries as gel, AGM, SLA, VRLA, and lithium-ion battery.【with 3 LED Indicate Light】The solar car battery charger features three indicator lights, Blue indicates sunlight reception by the solar panel, red indicates charging from solar panel to battery, and green indicates a fully charged battery. The MPPT requires 2 seconds for calculation and LED status switching.【Robust and Long-lasting Materials】Excellent performance of PC+ABS+Tempered glass material, Make allows the solar panels to easily cope with temperatures ranging from -40 to 137 degrees Celsius, and IP65 waterproof can survive heavy rain and high wind.【12-Month Warranty】The quality of your premium solar battery charger is guaranteed by CE/ROHS certifications and comes with a free 12-month warranty+lifetime technical support! If you have any questions, please contact us. Your suggestion helps us improve!