EPEVER 40A MPPT Solar Charge Controller 100V Input Tracer 4210AN with Display Negative Ground Lithium Battery Charger Work with LiFePO4 EPEVER Tracer 4210AN Series Negative Ground and compatible with Lithium(LiFePO4) Battery Charging. Compatible with 12V or 24V battery system. High tracking efficiency up to 99% Multiple load control modes: manual control, light ON/OFF, light On+Timer and test mode. Die-cast aluminum design and nature cooling Four battery type options:Sealed, Gel, Flooded, and USER define Temperature Sensor Connector Solar Panel, Battery, Load Connector RS485 Connector MPPT tracking efficiency above 99.5% Maximum charge conversion efficiency as high as 98% Support lead-acid and lithium-ion batteries Multiple load work modes Charging power and current limitation High-temperature charging power derating function Standard Modbus communication protocol with RS485 interface Real-time energy statistics SELECT button Remote Temperature Sensor(RTS) Interface PV Terminals Battery Terminals Load Terminals Mounting Hole 5mm RS485 communication interface ENTER button LCD Display