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Product Description3-step charging method adjustable for all battery types and works with nearly all solar panels (PV-modules). Suitable for 12V and 24V batteries. The charge controller protects the battery from being overcharged by the solar array and from being discharged too deeply by the load, and it adjusts itself automatically to 12V or 24V system voltage. Push-button allows switching the load on and off. Features clear LCD and graphics, automatic night light detection, and an extensive alarm system (buzzer). Automatically switches off load when battery current is low. A battery temperature sensor is standard and regulates the optimum charge voltage at each temperature to prolong the life of the battery.