This solar recharge controller can fully meet the requirements of your home photovoltaic system (including home lighting system). It can automatically recongize 12 V and 24V Lead acid battery and with powerful functions, if you need this porduct, come and have a try, it will not let you down. Features: Adopt large LCD display screen for you to read the number more clearly, give you a better experience. With the characteristics of low power consumption, high efficiency and long service time. Fully 4-stage PWM recharge management and dual mosfet reverse current protections. Multi-protections: This solar recharger with short circuit protections, open circuit protections, over current protections, overcharge protections, over-discharge protections and reverse polarity protections. Dual USB output ports can meets your daily needs, this tool can be widely used for camping, grassland, mountain area, boat and so on. Specifications: Material: PVC Maximum solar panel input: 12 V battery: 25V 1200W 24V battery: 50V 2400W Rated voltage: 12 V 24V automatic Item size: 137 * 72 * 35mm / 5.4 * 2.8 * 1.4in Package size: 140 * 80 * 45mm / 5.5 * 3.1 * 1.8in Package weight: 160g / 5.6ounce Note: Before installing for the first time, make sure that the battery has enough voltage to enable the controller to recognize the battery type. The regulator is only suitable for lead-acid batteries: OPEN, AGM, GEL. It does not apply to Ni-MH, Li-ion or other batteries. Only suitable for regulating solar modules. Connect the battery to the recharge regulator-positive and negative. If a 12 V battery is detected, it will display 1 and if a 24V battery is detected, it will display 2. Connect the photovoltaic module to the regulator-plus and minus, and then to the recharging regulator-plus and minus. The reverse order applies when uninstalling. Improper sequence will damage the controller. Packing list: 1 * Solar Controller