Start Pac 3328 Special 28V DC Power Supply / Battery Pack

Start Pac 3328-Special
Start Pac 3328-Special
Manufacturer: Start Pac
Part Number: 3328-Special
Condition: New
Warranty: 1 Year Limited Warranty - View Details
Price: $5,449.95
✓ Worldwide shipping options available
✓ Manufacturer CofC always available at no cost after shipping
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This StartPac GPU is designed for ground use to perform mainly starting functions. When connected to AC power, the depleted batteries can be charged in four hours with the built-in power supply/battery charger.

This turbine starting unit is designed to provide superior starting for large turbine engines including the TPE 331.


The Model 3328 GPU is a combination of power supply and battery pack.


  • 78 Amp Hours at 10-hour rate
  • 28.5 Volt DC-30.5 Volts at rest
  • Sealed cells non-hazardous
  • Valve regulated high amperage output lead acid
  • 2800 Peak amps

Power Supply/Charger

  • 15 amps DC continuous output at 28.5 Volts
  • Battery recharge time- four hours
  • AC Input- 110 Volt or 220 Volts


  • 250 Amps maximum continuous DC load

This GPU is rated at 2800 peak starting amps and is a full 28 volt battery pack (28.5 volt, to be exact). Due to the extra starting power provided by the 28.5 Volt batteries, turbine engines will experience faster, cooler starts and extended turbine life. This model is primarily designed for superior starts on large turbine engines and the Garrett TPE 331.

This airplane starting unit is more economical than the 3328 as it does not incorporate the high output DC power supply. Also, this unit can be configured for 110 Volt or 220 Volt AC input. This unit weighs 185 lbs/83.92 kilos.

Always recharge the GPU until the green light appears. Once charged, it is not necessary to leave unit plugged in. If heater is installed, turn unit off but leave plugged in.

Avoid discharging the batteries completely as damage to the cells can result.

Always recharge batteries soon after use.

Battery Disconnect: When operating the continuous power supply at 105 amps and below, activate the battery disconnect. Since the 28.5 batteries actually read 30.5 Volts at rest, leaving the battery disconnect connected will deplete the batteries nearly 50% before their voltage reaches 28.5 Volts. Thus in this situation, only one half of the battery capacity will be available for engine starting. By keeping the batteries separated from the continuous power supply, you will have full battery capacity for engine starts. If you need more than 105 continuous amps, then use the battery disconnect and the batteries will make up any amperage needed

There are approximately thirty 110 volt and thirty 220 volt NEMA plugs in use. Also, customers have various receptacles at their hangars and MRO facilities and may require specific AC cord lengths to meet their requirements. Due to these facts, we do not automatically provide AC power cords. If you provide the NEMA plug number and specify the AC power cord length you require we will build a cord to be shipped with your unit for a small fee.


You Ask. We Help. Your FAQs.

Could this unit be used for starting King Airs?
Some of the new King Air or King Air conversions are voltage sensitive. When our 28V units are fully charged, they will read about 30.5V. If there are no voltage sensitivities, then the 3328 Special would be the best option. If there is a voltage sensitivity, then you would need the 3326 Special.

Shipping Information
Pkg. 1 Weight332 lbs.
Pkg. 1 Dimensions41 in. x 25 in. x 25 in.
Pkg. 1 TypeCarton
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We sell parts for the 3328-Special and other items like it at our facility. Not sure exactly what part you need? Just describe it or send us a photo and we will research it for you.

A few of the common parts we offer for this item are:
• Aircraft Cable
• Input Power Cable
• Trolley
• Weather Covers

We provide short-term and long-term rentals for the 3328-Special. We will ship the item directly to you and arrange for pickup at the end of your lease.