Xantrex solar panels feature the latest bus bar and monocrystalline solar cell technology for increased power generation and durability. PWM charge controllers and accessories offer advanced features including multi-stage charging, data log, and real-time system indicators. Xantrex's Remote Battery Temperature Sensor for its FREEDOM XC Series or BC Series battery chargers protects your solar panels. It is recommended to have a battery temperature sensor on all of your banks to protect your batteries and provide optimal charging. It is compatible with Xantrex's solar panels, solar panel kits, FREEDOM XC Series Inverter/Charger, and Xantrex's BC Series Battery Charger.