Purkeys DIRECT™ single-source liftgate charging system is the complete package. It boosts voltage through a DC to DC converter to fully charge electric liftgate batteries faster and to overcome the voltage drop from the tractor to the liftgate batteries.
The smart control unit of the DIRECT automatically regulates and extends electric liftgate battery charge time, which fully charges power liftgate batteries. This increases battery life and allows the liftgate to work more efficiently. An easy-to-read LED display identifies potential issues and reduces troubleshooting time by alerting drivers and technicians to the status of the liftgate batteries and the source.
The DIRECT draws power from one of the following:
Stinger Cord (Dual or Single Pole)
7-way Aux Pin
DIRECT is a Good Match for Fleets that:
Use the same power connection for all tractor/trailers
Need an extra boost to optimize charge time
Make multiple stops during a route and want liftgate batteries to charge faster
Purkeys’ DIRECT™ meets all power liftgate charging requirements. There are different kits available to meet specific financial or technical needs.
Purkeys warrants each product to be free of defects in material workmanship under normal use and service. This warranty benefits the customer and covers products made by Purkeys and sold by Purkeys or their authorized dealers. The warranty period is 36 months. This warranty is not valid if the product is not used correctly or is altered without written consent. Defective products must be inspected by Purkeys as part of the warranty claims process. The warranty will not apply if the product is subjected to an accident, faulty repair, improper installation, neglect, or defects in the peripheral vehicle components.
The Direct Liftgate Charging System uses a single input from the stinger or 7-way cord, an electronic controller, and a DC/DC converter to optimize charging voltage and extend battery charging times. LED indicators on the front of the controller show the liftgate battery and charging system status and alert of potential charging system problems.
How do Select and Direct Liftgate Charging Systems optimize charging voltage?
Direct and Select Liftgate Charging Systems optimize liftgate charging voltage in two ways. First, the DC/DC converter eliminates the voltage loss associated with traditional extended length dual and single pole charging circuits by raising the low-charging voltage to the correct level. Second, the DC/DC converter adjusts charging voltage based on temperature, with higher voltages in cold weather and lower voltages in hot weather. These two features ensure optimal charging voltage to maintain maximum battery state of charge for increased liftgate performance and battery life.
How do Select and Direct Liftgate Charging Systems extend battery charge times?
Direct and Select Liftgate Charging Systems can extend battery charging times by keeping the DC/DC converter on, even when the truck or refrigeration unit is turned off. This is done by the controller, which monitors the truck/reefer battery state of charge and only allows extended charging to occur if the truck/reefer batteries are at a high state of charge. When the controller detects the truck batteries becoming discharged, it turns off the DC/DC converter, protecting the truck from a possible no-start condition.
What is voltage drop?
Voltage drop is the loss in voltage in all or part of a circuit when electrical current is flowing. Voltage drop can only occur when current is flowing.
How long does it take to install a Select or Direct Liftgate Charging System, and will it require special tools or training?
All Select and Direct Liftgate Charging Systems come with comprehensive installation and troubleshooting guides that include detailed text and photos. No special tools or training are required. The guides can also be accessed on our website (HTTP://PURKEYS.NET/SELECT/#PRODUCT_INFORMATION and HTTP://PURKEYS.NET/DIRECT/#PRODUCT_INFORMATION). Installation times vary, but first-time installations can generally be done in approximately 4 hours. Installations can be done in less than 4 hours once a technician becomes familiar with the process and trailers being worked on.
How do I know when the Select or Direct System is charging the liftgate batteries?
Select and Direct Systems have LED Indicators to assure the operator of proper system function. A properly charging system will have a Lift Battery and Source (Reefer, Stinger, or Aux) LEDs that are solid green when there is sufficient power available at one of the input sources.