Start Pac 3328-300/400 Amp 28V Power Supply / Battery Pack

Start Pac 3328-300/400
Manufacturer: Start Pac
Part Number: 3328-300/400
Condition: New
Warranty: 1 Year Limited Warranty - View Details

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These ground power units are designed to perform starting, powering up aircraft systems and maintenance functions. When connected to AC power, the depleted batteries can be charged in a matter of hours with the built in power supply/battery charger.

The 3328 contains a full 28-volt battery bank for starting and a large power supply to provide a continuous current at 28.5 Volts DC for maintenance. This mobile GPU is configured with a 300 or 400 amp power supply. This will satisfy the ground power requirements of most business jets, and includes on-board air conditioning and other high draw aircraft systems.


  • 26 Amp hour at 10 hour rate

You Ask. We help. - Your Questions Answered

Can you use this unit for 400 continuous amps on battery only?
When using the batteries for continuous ground power operation you could pull up to 400 amps. Please note that the batteries are not designed for continuous power. Even at a 40 amp load they will only last for about 20 minutes. Also when using the batteries for continuous ground power if they are deep discharged it is very hard on the internal plates of the cells and greatly reduces the life. If you draw the batteries down to 24 volts they are 95% depleted, if they are drawn down below that you are damaging the cells. When using for starting a spike below 24v for a few seconds is ok.