Samlex Temperature Sensor f/SCC-30AB w/10' WireTemperature Sensor for SCC 30AB with 10' Wire The DC BTS A C Battery Temperature Sensor for Use with SCC 30AB Solar Charge Controller Temperature compensated charging ensures that batteries are charged to maximum capacity in cool environments, and are well protected from over charging in warm environments (sold separately). Features: Ring terminal with embedded sensor Bare Positive (+) end (Red wire) Bare Negative ( ) end (Black wire with red stripe)