Model Li3326QC 50 Amp Set

Li2700 Twin Pac Lithium Power Supply for Aircraft GPU starting

Model Li2700QC Twin Pac Starting


This powerful Lithium Ion starting unit is a full 26VDC portable battery pack and will provide superior starts on all electrically-started turbine engines. This versatile Twin Pac can be used as a single unit or separated in order to have two complete Lithium units that can easily be on board different aircraft. It has redundant chargers with a total of 18 amps output and a recharge time of approximately four hours.


STARTING UNIT model referenceLi2800QC Twin Pac
Battery typeSafe lithium-Ion
Voltage28 VDC
Peak Current3500 A
Capacity @10 Amp Rate62 Ah
Total Weight88lbs/40kg
Dimensions – Length x Width x Height52″ x 23″ x 23.5″ 132 x 58 x 60 cm
Charger typeBuilt in
Float type charger input (must be specified on order)90-240 VAC 50/60 hertz
Charging time range30 minutes to 4 hours

Model 53050 Power Supply

When plugged into 110/220 Volt single phase AC power, PAC® Model 53050 is a 28.5 Volt continuous DC portable power supply . Continually delivering full 50 amp DC output, this unit does not, however, provide enough current for starting an aircraft engine or mining equipment. Instead, it has been designed to power up various systems, such as programming GPS and avionics. The PAC® Model 53050 is also an excellent choice for powering aircraft maintenance equipment.


Model 53050 – 24

POWER SUPPLY model reference53400-24/28V
Maximum Continuous Current output400 A
DC voltage output28 VDC
AC voltage input180 – 240 VAC
AC current input at maximum DC power output53 A @220VAC
Forced air-coolingYes
Over current protectionYes
Over voltage protectionYes
Over temperature protectionYes
Complete weight with aircraft cables60lbs/27kg
Dimensions Length x Width x Height50″ x 23″ x 23″ 127 x 58 x 58 cm

The engineers at START PAC specifically designed the new Li2700QC as an airplane starting unit for aircraft with voltage protection relays that are set lower than most aircraft, meaning that they cannot accept more than 29.5 volts from an external starting source. These aircraft include but are not limited to the Agusta Westland AW139, Sikorsky S-76, Eclipse 500 and both the Phenom 100 and Phenom 300.

This unit is designed for engine starting only.

The all new START PAC® Model Li2700 QC Twin Pac utilizes the latest technology in Lithium batteries; these batteries provide the same power as the lead-acid type, but are 42% lighter and 32% smaller. In addition, lithium batteries have two other major advantages:

  1. Twice the battery life of lead-acid batteries
  2. No sulfation problems (can be left in a discharged state without causing damage)

Load vs. Time (click to view larger)

Li2700QC Twin Pac Load vs Time Curve

NOTE: When storing the START PAC® for more than 30 days, remove the battery box from the charging unit and keep separately.

PLEASE NOTE: Lithium ion batteries can be damaged by deep discharges. Do not run the batteries down below 22 volts; a spike during a start is okay. Voltages below 22 will begin to damage the batteries and at 20 volts, the batteries will be damaged beyond repair.

Trust START PAC to deliver reliable and long-lasting products. Maybe, you need a different power supply unit? Or even a unit that starts up gas turbines? Whether you need a new starting unit, or 28 volt power supplies, START PAC offers a large selection of other products in addition to the portable Model 53050, including ground power units, starting units and portable power supplies.

Special features:

Remember, that this unit is NOT designed for engine starting or battery charging. Also, make sure that you don’t cover or enclose the START PAC® when in use, as this will inhibit airflow needed for cooling purposes.

Use a minimum of 12# wire size for the AC extension cord.

All START PAC™ products come with a 1-year warranty on workmanship and materials.*

Please handle this unit in a responsible manner. START PAC™ is not responsible for damages caused by misuse or neglect.


Need Assistance?

START PAC offers a wide selection of power suppliesstarting units and combination Aircraft Ground Power Units (GPU). Browse our website to read about our extensive product line or visit our tutorial section to gain a more technical insight into our products. If you have a question or need help finding the right product for your aircraft, locomotive or vehicle, START PAC provides customer service support via phone and email. One of our friendly and knowledgeable experts will guide you to the product suited to your specific needs. If – for whatever reason – you are unhappy with your START PAC product, simply send return the unit to us for a full refund.

Why buy from START PAC®?

Made in the USA and developed with the latest state-of-the-art battery and power management technology, our products are trusted the world over. START PAC power supplies are built for heavy duty application and are designed to withstand all environments, however tough. START PAC boasts superior technical and after sales support thanks to our long standing industry experience and our passion for the industries in which we work. START PAC offers unparalleled value for money and fast global shipping via our international dealership network.

*Batteries are cycle-dependent and are therefore not covered under this warranty.