This controller is a kind of intelligent￡? multi-purpose solar charge and discharge controller. These series products adopt LCD display￡? which makes the operation on the interface rather convenient. All the controlling parameters can be reset flexibly to satisfy your different needs. <br> <br> <strong>Features:</strong> <br> LCD display￡? brief key operation￡? very convenient. <br> PWM charge mode can improve system efficiency and prolong the life span of the battery. <br> Automatic indentification system voltage level￡? automatic temperature compensation. <br> Adjustable charge-discharge control parameters￡? settable operating modes of loads. <br> Over-load/short-circuit protection￡? battery reverse-discharge/reverse connection protection. <br> Battery low voltage disconnection(LVD). <br> Accumulated function of charge and discharge ampere hours. <br> Suitable for street and pathway lighting￡? parking area￡? bus station￡? etc. <br> <br> <strong>Specifications:</strong> <br> Color: Black <br> Material: Plastic <br> Rated Voltage: 12V / 24V Automatic <br> Rated Current: 30A / 50A (Optional) <br> Voltage of Solar Panels: ?ü50V <br> Float Charging Voltage: 13.7V / 27.4V <br> Low Voltage Protection: 10.7V /21.4V <br> Low Voltage Recovery: 12.6V / 25.2V <br> No Load Loss: ?ü10mA <br> Loop Voltage Drop: ?ü170mV <br> Temperature Compensation: -4mV/Cell/??C <br> Working Temperature: -20~60??C <br> Storage Temperature: 30~70??C <br> Humidity: ?ü90%￡? no condensation <br> Item Size:? <br> 30A: 185 * 90 * 45mm / 7.28 * 3.54 * 1.77in? <br> 50A: 185 * 125 * 60mm / 7.28 * 4.92 * 2.36in <br> Item Weight: 30A: 350g / 12.35oz; 50A: 592g / 20.89oz <br> Package Size: <br> 30A: 20 * 10.5 * 6cm / 7.87 * 4.13 * 2.36in? <br> 50A: 21 * 15 * 9cm / 8.3 * 5.9 * 3.54in <br> Package Weight: 30A: 446g / 15.75oz; 50A: 765g / 26.99oz <br> <br> <strong>Package List:</strong> <br> 1 * Solar Charge Controller <br> 1 * Temperature Probe <br> 1 * User Manual(English)