The OutBack Remote Temperature Sensor (RTS) is a necessary tool for
proper battery charging. All OutBack products with integrated battery
charging have a temperature compensation system built-in which benefits
from the installation of the RTS (included with inverter/ chargers). The
RTS ensures an OutBack system knows the precise battery temperature so
that batteries can be recharged safely and efficiently. Systems with
multiple OutBack products connected to one HUB4 or HUB10 require
installation of only a single RTS. 15-foot cable length with RJ45 quick
connector included.