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Safe, Affordable, Airframe Power for Piston and Light Turbine Aircraft

The Enhanced Flight 2835A GPU achieves a remarkable 89% electrical efficiency to provide up to 1,000W of power. Its cool running, switching-mode power modules provide massive amounts of stable, noise-free power from a 90-230 volts AC input. It will safely power the most delicate airframe systems with laboratorygrade DC without risk of costly damage to sophisticated avionics, instruments, or electronic equipment. This new generation GPU is designed as a practical alternative to large, expensive start carts, and battery chargers, and other devices designed primarily to spin starter motors. Unique, ergonomic design features dual, removable cord/tool caddies.

GPU Operator’s Manual


  • Stable, noise-free DC power, safe for today's advanced cockpit systems.
  • Digital output meters for both voltage and amperes, with overload warning.
  • Includes detachable input and output cables with AN2551 3-pin oval plug.
  • Compact, lightweight design utilizes highly efficient digital switching-mode power modules for greater reliability.
  • Removeable caddies for cable management and tool storage.


  • Input: 90-230 Volts AC, 50-60 Hz, up to 9.5 Amps
  • Output: 28 +/- 0.5 Volts DC, up to 35 amperes continuous
  • Weight: 19.4 lbs (8.5 kg) without cables
  • Dimensions: 7.25"H x 14.6" W x 13.75"D (18.1 cm x 27.6 cm x 34.9 cm)
  • Note: See the Model 2835A manual for details on aircraft compatibility and start assist (piston engines only).
  • IMPORTANT DISCLAIMER & OPERATING LIMITATIONS: Audio Authority® authorizes this device for use ONLY by aviation professionals, such as licensed pilots and maintenance technicians, knowledgeable about their aircraft electrical system and batteries. Aircraft electrical systems vary widely. Many aircraft electrical systems have been altered in the field from the original OEM configuration and these changes are often poorly documented in the aircraft records. The operational concepts, recommendations, and instructions presented here are necessarily general and make assumptions that do not apply to every aircraft, and may not be correct for your particular aircraft. Incorrect use of this device has the potential to damage the GPU and/or aircraft components. It is the operator’s responsibility to read completely and fully understand the manual, plus those sections of the Aircraft Flight Manual and Maintenance Manual that pertain to their aircraft’s electrical system design, to determine the appropriate use of this, or any, external power source. If you cannot do this, do not use this product. Instead, consult the airframe manufacturer or a technician familiar with your specific aircraft type and configuration before connecting a GPU to your aircraft.

Mfg Q&A

  • Does this unit have both 12v and 24v output? No, this is 28-volt DC output only (for aircraft with 24V battery).
  • Can I use it like a starter device for my C172? No, this unit is intended for airframe and avionics power only, not for engine starts. The 70A version may be used for start assist, piston engines only.
  • Q1. What is the length of AC cable? 2 meters
  • Q2. The cable is free or option item? AC input and DC output cables are included.
  • Q3. Could you give us the 28VDC output connector specification? The output cable plug is 3-pin AN2551 (Aircraft Spruce P/N 11-03158)
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showed up quickly works well good instructions

Tony D Verified Purchase


August 19, 2021

Your are specifically not authorized to use any comment or endorsement for our order. We are compensated for product endorsements. In the interest of providing internal feedback to you, your delivery time exceeded our expectations, product was packed very well. We are likely to continue to do business with you. next--I would like to find a very cost effective lightweight portable jump start for a 24 volt three prong Cessna 414. Lots of very expensive ones in your catelog. Im sure good quality. Just expensive

February 13, 2021

Very well made, quality product. Perfect for my 28V Bonanza.

Kelly M
July 8, 2020

Took a while to get since it was backordered but really works well on my Citation. I am on a little airport with no power carts and this saves my battery for engine starts big time

May 4, 2019


Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this unit have both 12v and 24v output?

No, this is only 28v output.

Q: Does the GPU with BatteryMINDer work outside North America?

The GPU itself may be used with almost any voltage, but the internal BatteryMINDer is only compatible with a 100-127V AC power source. In countries with other voltage standards, a compatible BatteryMINDer must be purchased and used separately.

Q: Can I use it like a starter device for my C172?

No, this unit is intended for powering up avionics units without the engine running.

Q: 1. What is the length of AC cable? 2. The cable is free or option item? 3.Could you give us the 28VDC output connector specification?

The AC cable would be 6-1/2 ft. long. This cable would come with the purchase. The 28VDC specs are 28 +/- 0.5 Volts DC, 35 Amps continuous.

Q: I was just wondering what is the input AMPs if we have a 240v supply. Thank you.

This unit has Universal input: 100-240 VAC 50-60Hz 9.5A.

Q: Will this fit the Beechcraft bonanza aux plug?

The 2870A GPU is compatible with all piston and turbine aircraft with 28 VDC electrical systems (24 volt batteries) that initially draw less than 70 amperes without optional equipment turned ON. This includes most piston aircraft and a large number of turboprops and small jets.

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