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The Purkeys’ Select™ system allows charging from multiple
sources and improves the charging of liftgate batteries by utilizing
a DC/DC converter to boost the voltage for optimal charging.
The boost in voltage overcomes the normal voltage drop caused
by the extended distance between the liftgate batteries and the
vehicle charging system. Also, in cold temperatures batteries
require increased charging voltages to maintain a high state of
charge. The DC/DC converter in the Select system compensates
for temperature by providing higher charging voltages in cold
weather. The result is well-charged liftgate batteries that will last
longer and have ample power for liftgate operation.
The Select system is automatic and has easy-to-interpret LED
indicators to assure drivers and technicians of proper system
function. The Select Controller increases the time that the DC/
DC converter can charge the liftgate batteries by automatically
choosing the best available source of power (tractor or reefer)
and by monitoring the source power and “extending” the liftgate
battery charge time to take full advantage of the available power,
without compromising the source batteries’ ability to crank the
engine.
The Select system provides opportunity charging for liftgate
batteries that is essential in low mileage, high frequency liftgate
operation applications. The LED indicators clearly show the
status of the source as well as the status of the liftgate batteries.
A quick glance at the Select Controller assures the driver that
the liftgate batteries are ready to go, or alerts the driver that the
batteries need maintenance.
GENERAL INFORMATION
