The MPPT (Maximum Power Point Tracking) solar charge controller provides an efficient, safe, multi-stage recharge process that extends battery life and ensures peak performance from the solar array. Each charge controller allows the battery to be recharged on demand Features: LCD display, easy to operate on LCD screen Multi-stage charging (three-stage charging, parallel charging and balanced charging function) BTS - remote battery temperature sensor terminal Enables Lithium Lithium charging, Gel, lead acid battery with RS485 and USB communication port Protections: PV array short circuit, PV reverse polarity, battery reverse polarity, overcharging, output short circuit