WHY CHOOSE US? 1. 3C standard: Using dedicated chips and dedicated software, can automatically manage the working of solar panel and battery in solar system 2. Support moblie phone charging 3. Safe to use with Built in protection 4. Dual MOSFET Reverse current, protection from lightning strike. 5. Prolong the battery life cycle and keep the load work well. 6. Easy to use and suitable for small solar energy system. INSTALLATION: 1. Q: How to install the solar controller ? A: Connect the battery, solar panel, and the load (in proper sequence) 2. Q: How are the wires connected to the controller? A: Unscrew the screw, fit wire in small hole and screw in to tighten it up 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. ABOUT THIS CONTROLLER: *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