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Model RBL4000 14/28V Switchable

Red Box Power Starting Battery
Model RBL4000 14/28V Switchable


These high powered dual 12v/24v and 14v/28v units are designed to offer maximum power to weight ratio. With the Red Box ‘switch cable system’ these switchable start units can outlive similar products on the market by up to 100%. Red Box dual voltage systems comprise of 2 batteries cleverly configured to ensure that an equal amount of current is drawn from both cells, regardless of whether you are using the unit in 12v/14v or 24v/28v mode. Many other systems on the market will use only one battery when in 12v or 14v mode. Built to Military and Aviation standards, you can be guaranteed of the quality of this product.

Units are available in both lead acid and lithium. The lithium units are more expensive but if weight is an issue then these units are the answer.

All our switchable start units come with a separate charger, assuring the life of your pack. It is the pack that will get the continual use, keeping the charger separate protects it. The inbuilt LED display will ensure you always know the status of the pack. When the batteries within the unit finally come to the end of their life, simply contact us for a replacement set, all batteries are designed to be easily replaceable.

Product Specification

Max amps 28V 2000 (Nom. short circuit current)
4000 (Max. short circuit current)
Max amps 14V 4000 (Nom. short circuit current)
8000 (Max. short circuit current)
Capacity 28V 28 Amp Hrs @ 10hr rate
Capacity 14V 56 Amp Hrs @ 10hr rate
Max voltage 28v DC
Size L400 W230 H280 mm
Weight 18 kg
Operating Temp -40°C – + 60°C
Case Aluminium
Voltage Indication Digital to IP65
Auxiliary Protection Circuit breaker 20A
Auxiliary Input 29V DC
Aircraft Cable 2 m heavy duty
Charger 8 Amp universal AC input. Charging time less than four hours from 50%
Protection Reverse polarity warning

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