20A Solar Charge Controller12V-24V Solar Panel Controller Battery Intelligent Regulator with USB Port Display?Adjustable Parameter Backlight PWM Auto LCD Display and Timer Setting ON-Off Hours

Product Specification: *Voltage: 12V/24V *Over charge Protection: 14.4V/28.8V *Over charge Floating charge: 13.7V/27.4V *Charge recover voltage: 12.6V/25.2V *Over discharge Protection: 10.7V/21.4V *Load Mode: 24 hours, 1-23 hours, 0 hour *Max input power and voltage: 390W /12V; 780W/24V *Equalization: B01: sealed 14.4V / B02: Gel 14.2V / B03: flood 14.6V Package includes: 20A Solar Charge Controller*1 User Manual*1 PLEASE READ BEFORE BUYING: 1. This controller can only use photovoltaic panels as charging power. Do not use DC or other power as charging power. 2. if the LCD display has an error of 0.2 V- 0.3 V, please don't worry ,it is normal. 3. Old batteries may be degraded the capacity after hundereds of cycles, easily drop lower than 8V, which results in the controller will be shut off (LCD screen become totally “DEAD”). 4. Indoor use only: the working temperature of this controller is -35°C to +60°C, during hot sunny days, the temperature outside might go up to 60-75°C. Please do keep the controller stay in cool and well-ventilated place to maintain good heat dissipation.   System Connection: 1.Connect the battery to the charge regulator - plus and minus. 2.Connect the photovoltaic module to the regulator - plus and minus. 3.Connect the consumer to the charge regulator - plus and minus. *The reverse order applies when deinstalling! *An improper sequence order can damage the controller!   Attention: 1.press the [Down] button to ON/OFF load manully at main display. 2.the work mode is working as below: [24H] - load output 24hours [1-23H] - load on after sunset and closed after setting hours  [OOH] - Dusk to dawn 3.Batteries:Only fit for OPEN, AGM, GEL 4.The charge regulator is only suitable for,regulating solar modules Never connect another chargin