100A MPPT Solar Charge Controller 12V 24V 36V 48V with Blacklight LCD Display Intelligent Regulator Charge Controller for Lead-Acid Battery Dual USB Ports Aluminum Alloy Heat Sinks Solar Panel Photovoltaic Input Peak Power (W): 12V battery<1200W 24V battery<2400W 36V battery<3600W 48V battery<4800W Rated Charging Current (A): 100A Photovoltaic Panel Input Voltage Range (VDC): Use 15V-23V photovoltaic panels for 12V batteries; 24V battery uses 30V-45V photovoltaic panels; 45V-69V photovoltaic panels for 36V batteries; 48V battery uses 60V-90V photovoltaic panels; DC Output: Rated Output Current (A): 50A Low Voltage Protection Voltage (V): 10.7V * 2/3/4 High Voltage Protection Voltage (V): 15.5V * 2/3/4 USB Output Interface (V): 5V1A * 2 DC Output Interface (V): 2A * 1 (output voltage follows battery voltage) Charging Method: Focused MPPT pulse width modulation charging Protection Function: prevent overshoot, overvoltage/DC output low voltage, high voltage protection, reverse connection protection, etc Cooling Method: Self cooling of heat sink Operating Environment Temperature: 0-40 ºC Storage Environment Temperature: -15-+50 ºC Operating/Storage Environment Humidity: 0-90% without condensation Product Size: 19.5 * 18.3 * 6.8 cm/7.7 * 7.2 * 2.7 inch   Attention:  Do not use solar panels that charge 24V/36V/48V to charge 12V batteries; Excessive pressure difference may cause overheating and damage to the controller. Wiring instructions: In order to correctly identify the battery voltage, the controller First wiring ensures: 12V battery voltage higher than 10V; 24V battery voltage higher than 20V: 36V battery voltage higher than 30V; 48V battery voltage higher than 40V: Connect the controller wiring to the battery first, then to the photovoltaic panel, and finally to the DC load