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Ground Power

   Safe, Affordable
   Airframe Power for
   Ground Operations


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[Image for M2827]
27A 28V Ground Power Unit
27-amp 24/28-volt GPU with 3-pin Oval Plug
Model M2827

[Buy Online]
$745.00 USD
    • Dual digital output meters, volts & amps
    • Overload alarm and auto-shutdown sequence
    • 6' GPU output cable with red SB50 to 3-in oval AN2551 plug
    • Universal Input: 90-230 VAC  10A 50-60Hz.
    Aircraft Spruce - GPU details         Sporty's Pilot Shop
    Categories: Aviation Mini-GPU, Aviation, Aviation 24V-GPU

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    Attention: FBOs, dealers, shops & OEMs -- Call 800-322-8346 or e-mail sales for quantity purchase information.


    Safe, Affordable, Airframe Power

    Our M-Series Mini-GPUs achieve a remarkable 88% efficiency to provide up to 27-amps of power at 28-volts DC, perfectly replicating the in-flight electrical environment. Its cool running, switching-mode power modules provide massive amounts of stable, noise-free power, compatible with input voltages from all over the world. It will continuously power the most delicate avionics and airframe systems without risk of depleting the ship’s battery or causing costly damage. 

    The Model M2827 comes with a 6’ airframe output cable with red SB50 connector at one end (protects from damage due to accidental voltage mismatch) and a standard 3-pin oval AN2551 aircraft plug. 


    GPU Features

    • Output: 28 VDC, 27 Amps maximum continuous
    • Input: Universal, world-wide, 85-264 VAC, 47-63 Hz
    • Switching Mode Output Module with automatic self-protection for short circuit / overload / over voltage / over temperature
    • Digital output meters for both voltage and amperes
    • Includes detachable input and output cables 
    • 6-ft airframe output cable with red SB50 and 3-pin AN2551 plug signify 24/28V operation only and locks out yellow 12V plugs to protect from voltage mismatch 
    • Compact, lightweight design utilizes highly efficient digital switching-mode power modules for voltage stability and long-term reliability 




    • Output: 28 VDC, 27 Amps maximum continuous
    • Input: Universal, world-wide, 85-264 VAC, 47-63 Hz
    • Unit weight: 9 lbs (without cables) shipping weight: 12 lbs.
    • Carton size: 16 x 10 x 6 inches
    • Shipping Weight: 13 lbs.
    • Unit size: 13.4 x 5.32 x 4.13 inches


    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. The operational concepts, recommendations, and instructions presented in our manuals 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 included 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 the GPU to your aircraft.


    The Model M2827 provides 28-volt DC power for:

    • avionics demonstration and testing
    • database and firmware updates 
    • flight planning and cockpit procedures training 
    • troubleshooting and maintenance  
    • powered pre-flight inspections and battery top-off charging


    Frequently Asked Questions

    Q: Can I use the M2827 to start an aircraft engine?

    A: The M2827 GPU is inadequate for piston and turbine engine starting and should be used for airframe systems power only. 

    Q: How does the M2827 connect to my aircraft?

    A: The Model M2827 Mini-GPU includes a 6’ output cable with a 3-pin oval AN2551 plug that connects the GPU to the aircraft. 

    Q: Can I use the M2827 to charge my battery?

    A: The Model M2827 Mini-GPU is not designed for long-term battery charging. It has no circuitry for monitoring the battery’s state of charge or determining the precise charging voltage for various battery conditions and ambient temperature. So, the general answer is no. However, for short periods of time (an hour or two), the GPU’s output can be used to “top-off” the charge of a battery that is NOT serverely discharged. This is particularly useful during a powered preflight, allowing the pilot to take his/her time to check every airframe system and lights for proper operation without depleting the starting battery. 

    To optimize battery capacity and reliability, we highly recommend full-time, maintenance charging desulfation, and recovery. Our preference is the aviation-specific BatteryMINDer products by VDC Electronics. The BatteryMINDer is designed to remain connected for long periods of time, and will never overcharge or damage your battery.

    Q: Does the GPU work outside North America?

    A: Yes, the input voltage and frequency ranges are very wide and universal for worldwide operation: 85-264 VAC, 47-63 Hz. The AC cord supplied is a North American grounded 5-15, which can be adapted, or replaced with an appropriate cord, sourced locally.


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