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Ground Power
Audio Authority will be closed on Monday, May 27, in honor of Memorial Day.

   Safe, Affordable
   Airframe Power for
   Ground Operations

 Shopping Cart

 How to Choose a GPU

 Mini-GPU Tutorial

                 How to Use the
          White Lightning Mini GPU

 BatteryMINDer Built-In
            Advantages of a built-in
       battery maintenance charger
                  and maintainer

[Image for 2835A-B2]
35A 28V Ground Power Unit
35 Amp 28 Volt Aviation GPU with BatteryMINDer
Model 2835A-B2

[Buy Online]
$1345.00 USD
New quick connect kit, model BM-AIK2A available.
    • Dual digital output meters, volts & amps
    • Overload alarm and auto-shutdown sequence
    • Integrated BatteryMINDer charger, maintainer, conditioner
    • For lead-acid batteries only (not NiCad or lithium)
    • GPU output cable with AN2551 3-pin oval plug
    • Removable cord/tool caddies
    • Universal GPU Input: 90-230 VAC 10A 50-60Hz.
    • BatteryMINDer Input: 120 Volt electrical systems only
    Aircraft Spruce - GPU details         Sporty's Pilot Shop
    Categories: Aviation GPU, Aviation, Aviation 24V-GPU

    Log in to see dealer pricing

    [Front panel]
    Front panel
    [Rear view]
    Rear view
    [BM-AIK1 parts]
    BM-AIK1 parts
    [Output cables]
    Output cables
    [Charging stages]
    Charging stages

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

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

    Our next generation 2800 Series GPUs achieve a remarkable 89% electrical efficiency to provide up to 2000W of power. Its cool running, switching-mode power modules provide massive amounts of stable, noise-free power from a 90-230 volt AC outlet. It will safely power the most delicate airframe systems with laboratory-grade 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, battery chargers, and other devices designed primarily to spin starter motors. Unique, ergonomic design features dual, removable cord/tool caddies.

    Integral BatteryMINDer 

    This GPU includes the option of an integral BatteryMINDer®, the 3-stage continuous-duty charger that maintains, conditions, and desulfates lead-acid aircraft batteries (not for NiCad or lithium). The new CEC1 series BatteryMINDer offers improved diagnostic tools and modes that extend the life of your battery. Temperature-compensated output ensures precise charging under all conditions and will never over or under-charge. Desulfation restores full capacity and extends battery life. Our exclusive Airframe Interface Kit provides everything you need for use with FAA certified aircraft. Just hand the kit to your licensed mechanic to install and document with a simple airframe maintenance log entry.
     Cord Caddies and Handle
    Handle and removable
    cord caddies enhance portability.
     GPU Tutorial

    GPU Tutorial - 10 minutes.
    Installing a Quick Connect for BatteryMINDer

    Installing a quick connect charger harness.

    2870A-B1 Aviation Consumer Review

    2870A-B1 Aviation Consumer Review - YouTube
    GPU Customer Review

    GPU Customer Review

    GPU Features

    • Output: 28 VDC, 35 Amps continuous
    • Input: 90-230 VAC 50-60Hz 10A
    • Stable, noise-free DC power, safe for today's advanced cockpit systems
    • Digital output meters for both voltage and amperes, with overload alarm
    • 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 
    BatteryMINDer Features
    • Input: 90-140 VAC 50-60 Hz
    • BatteryMINDer integrated in GPU chassis
    • Compatible with most aircraft batteries, including Concorde 
    • Aircraft interface kit included for convenient and FAA approved connection
    • Includes detachable charging cable


    • GPU Input: 90-230 Volts AC, 50-60 Hz, up to 9.5 Amps
    • GPU Output: 28 +/- 0.5 Volts DC, 35 Amps continuous
    • BatteryMINDer Input: 90-140 Volts AC, 50-60 Hz. Unloaded input current: 80 mA AC
    • See BatteryMINDer user manual for detailed specifications
    • Weight: 19.4 lbs (8.5 kg) without cables
    • Dimensions including cord caddies and feet: 8.9"H x 11.25" W x 18.38"D (200mm x 284mm x 467mm)
      Without cord caddies: 5.1" W (130mm)
    Note: See the Model 2835A manual for details on aircraft compatability, battery use and charging limitations, and start assist (piston engines only).

    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 in this manual 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 this 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 2835A-B1 provides 28-volt DC power for:

    • Powered preflight and battery top-off
    • Battery charging and conditioning with BatteryMINDer charging system
    • Cockpit procedures training NavData updates
    • Cabin environmental systems
    • General maintenance

    Frequently Asked Questions

    Q: Can I use the 2835A to start an aircraft engine?
    The 2870A GPU is adequate for piston engine start ASSIST ONLY. Its capacity is inadequate for turbine engine start assist and should be used for airframe systems power only. Do not attempt turbine engine starts with the GPU connected to aircraft. See the User Manual for details.

    Q: Can I leave the BatteryMINDer connected for long periods of time?
    Yes, the BatteryMINDer is designed to remain connected and will not overcharge or damage your battery.

    Q: Does my GPU have Active Load Monitoring?
    A: This feature was introduced in January, 2015. All GPUs produced since then have the feature, and older GPUs can be upgraded at the factory for a fee. Details.

    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: Is the GPU BatteryMINDer compatible with Concorde batteries? 
    A:  Yes, BatteryMINDer chargers inside our Ground Power Units do not require any special configuration to properly charge Concorde batteries.

    Q: Why is Audio Authority selling aviation products?
    Audio Authority was the original designer and manufacturer of ground power products sold by Enhanced Flight Group, LLC. The Enhanced Flight GPU shares technology with Audio Authority power supplies used for demonstrating mobile audio electronics in retail stores. After Enhanced Flight ceased operations in 2009, demand was still strong for these products, so they are now available directly from Audio Authority and also from our distributors, Sporty's Pilot Shop and Aircraft Spruce.


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