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GSL 12V to 12V, Voltage Booster Battery Charger 40A

GSL 12V to 12V, Voltage Booster Battery Charger 40A
GSL 12V to 12V, 40A Voltage Booster Battery Charger
1 In Stock Now.
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Stock Update - 28th July 2021

Yes, we have stock. Right now there is 1 of these held at our warehouse (Queanbeyan NSW).
Our stock levels are real and live. If you order now we will get it out with our next daily freight.
We aim to hold the most stock and have the fastest delivery on all caravan accessories and spare parts.


GSL's new 12V DC to DC voltage booster battery charger is able to charge at 40A while still maintaining its compact size.

It also features optional automatic Boost Charge Asssist (up to 80A) which automatically connects main and auxiliary for extra charging assistance under certain conditions.

Suitable for AGM/GEL/FLOODED and Lithium batteries


  • Constant output power feature gives you extra charge Amps when your Auxiliary battery is low.
  • Boost Charge Assist also allows for Jump Start Assist which will automatically connect main and auxiliary for emergency jumpstart on low main battery conditions. (Solenoid sold separately)
  • Automatic sensing and compensation for large voltage drops on input wires.
  • Convection cooled light weight aluminium heatsink construction combined with polymer encapsulation making the unit strong, weatherproof and able to be mounted almost anywhere.
  • Over temperature/current protected.
  • 1 year warranty.


  • Model: NGBC1240
  • Brand: GSL
  • Lowest Operating Voltage : 11V
  • Weight : 560g
  • Maximum Operating Voltage : 16V
  • Maximum Current at Bulk Charge : 40A (80A with Boost Assist)
  • Charge Voltage for Flooded Cell : 14.5V
  • Charge Voltage for AGM : 14.3V
  • Charge Voltage for GEL : 14.3V
  • Charge Voltage for Lithium : 14.8V
  • Float Voltage : 13.5V
  • Output Short Circuit Protection : No
  • Dimensions mm (HxWxL) : 32.3mm x 71.5mm x 162mm
  • Shipping Weight: 600 grams.
  • Shipping Dimensions: 24 cm x 9 cm x 4 cm.

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