Feature: - Advanced maximum power point tracking (MPPT/PWM) technology, the efficiency is not less than 99.5%. High-quality components improve the system performance, and the maximum conversion efficiency is 98%. Super fast tracking speed and guarantee tracking efficiency. - Large screen LCD display, charge and discharge current display, cumulative power generation and discharge power query, temperature display, light control + delay control; Adjustable charge and discharge parameters, with power-off memory and other functions. - Dual USB output, the maximum current is 2.5A. Equipped with all necessary protection devices, the control parameters of the system are adjustable, easy to set up and operate. Built-in overheating, overcurrent, short circuit, open circuit protection, fault elimination, controller automatic recovery. Two-way MOS tube anti-backflow circuit, high-power charging mode, ultra-low heat.- Built-in short circuit protection, open circuit protection, reverse connection protection, overload protection. Reverse current protection, low calorific value, with self-recovery function, will not damage the controller. - Real-time display of temperature, charging current and discharge current. Current autofocus MPPT tracking charging, high charging efficiency, charging process does not stop detection, two-way focus tracking. Specs: Name: LCD screen solar controller Voltage: DC 12V / 24V Display: LCD screen Self consumption: Overcharge protection: 14.4V / 28.8V Overcharge float charge: 13.7V / 27.4V Charge recovery voltage: 12.6V / 25.2V Over discharge protection: 10.7V / 21.4V Over discharge recovery: 12.6V / 25.2V Dual USB output: 5V / 2A (charge mobile phone, iPad, etc.) Working temperature: -35-60 12V fits 18V solar panels, 24V fits 36V solar panels 12.0 volt lead acid battery corresponding The float voltage is set to: 13.6 The recovery discharge voltage is set to: 12.6 The discharge cut-off voltage is set to: 10.7 12.8 volt lithium iron phosphate battery corresponding The float voltage is set to: 14.6 The recovery discharge voltage is set to: 13.6 The discharge cut-off voltage is set to: 11.0 11.1 volt lithium battery corresponding The float voltage is set to: 12.6 The recovery discharge voltage is set to: 11.6 The discharge cut-off voltage is set to: 9.6 The minute is adjustable when the output is turned off, which is more convenient (there is no adjustment when the market is only available). Package Included: 1X Solar Panel Battery Charge Controller (50A) Note: 1. The charge regulator is only suitable for lead-acid batteries: OPEN, AGM, GEL, it is not suited for nickel hydride, lithium, Liions, or other batteries. 2. This controller can only use photovoltaic panels as charging power. Do not use DC or other power as charging power. 3.The LCD display has an error of 0.2V- 0.3V, but this is normal 4. Old batteries may be degraded the capacity after hundreds of cycles, easily drop lower than 8V, which results in the controller will be shut off (LCD screen become totally DEAD). 5. Indoor use only: the working temperature of this controller is -35C to +60C, during hot sunny days, the temperature outside might go up to 60-75C. Please do keep the controller stay in cool and well-ventilated place to maintain good heat dissipation.