Check the listing for details. Battery Temperature Sensor for SMA Sunny Island SI 6048 Temp Tempsensor NEW. Color: Yellow, Condition: New. Listed at 104.99 USD. BATTERY TEMPERATURE SENSOR (new in package) for SMA Sunny Island 6048 SMA Sunny Island 5048 SMA Sunny Island 5.0H SMA Sunny Island 6.0H Length: 10 meters Connector: Bare Wires with ferrules Cable: PVC Wire: 2 x 0.5 mm copper Sensor Tube: stainless steel Monitoring the battery temperature is an absolute must. Batteries can easily become too hot which causes them to fail quickly. When a temperature sensor is connected to the SMA Sunny Island it will monitor the battery and disconnect when temperatures get too hot. These sensors are very specific to SMA Sunny Island. Standard 100 and 1000 ohm RTDs will not work. A working temperature sensor is cheap insurance for your system. Shipping: Free shipping Returns: No Returns Allowed