The Victron Energy SmartSolar Solar Charger gathers energy from your solar panels and stores it in your batteries. Using the latest, fastest technology, SmartSolar maximizes this energy-harvest, driving it intelligently to achieve full charge in the shortest possible time. SmartSolar maintains battery health, extending its life. The SmartSolar charge controller will even recharge a severely depleted battery. It can operate with a battery voltage as low as 0 volts, provided the cells are not permanently sulphated or otherwise damaged. Bluetooth Smart Built-InThe wireless solution to set-up, monitor, update, and synchronize SmartSolar Charge Controllers. Ultra-Fast Maximum Power Point Tracking (MPPT)Especially in case of a clouded sky, when light intensity is changing continuously, an ultra-fast MPPT controller will improve energy harvest by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers. Load OutputOver-discharge of the battery can be prevented by connecting all loads to the load output. The load output will disconnect the load when the battery has been discharged to a pre-set voltage (48V model: interface with a relay). Alternatively, an intelligent battery management algorithm can be chosen. The load output is short circuit proof. Maintains battery health extending its life Will even recharge a severely depleted battery MPPT improves energy harvest even in the case of a clouded sky | Expion360 Victron Energy SmartSolar MPPT 75/15 in Blue