Xantrex Battery Temperature Sensor (BTS) f/XC & TC2 Chargers [808-0232-01]
Battery Temperature Sensor (BTS)
Designed for use with TRUECharge2 battery chargers.
The BTS mounts on a terminal post of a battery in a bank or on the side of a battery and measures its temperature. It sends precise information to the charger or charge controller, which automatically adjusts voltage to help ensure full battery charge depending on the ambient temperature of your battery installation.
WARNING: This product can expose you to chemicals including Diisononyl Phthalate (DINP) which is known to the State of California to cause cancer, and Di-isodecyl Phthalate (DIDP) which is known to the State of California to cause reproductive harm. For more information go to P65Warnings.ca.gov.
Quick Guide (pdf)
We Also Recommend
Blue Sea 7655 Mini Add-A-Battery Plus Kit - 10A 
BEP Pro Installer ANL Fuse Holder w/2 Additional Studs - 750A [778-ANL2S]
Paneltronics Standard Panel AC Meter - 0-150 AC Voltmeter & 0-50Amp Ammeter [9982304B]
Blue Sea 5181 80A Fuse Terminal