Stratus ESG ADS-B Out Transponder - Certified Aircraft

Qualifies for $500 FAA rebate!


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About ADS-B In options

Stratus portable connector kit

This kit includes a connection plate and wires. With this connection, your portable Stratus ADS-B receiver gets full-time power from the aircraft's panel so you never have to charge your Stratus battery, and it uses the aircraft's external GPS and ADS-B antennas for improved reception. This kit is $150. Specify Stratus 2 or Stratus 1S/2S.

Stratus 2i

Stratus 2i is a remote-mounted ADS-B receiver that provides weather, traffic, GPS and backup attitude. It is wired directly to and depends on Stratus ESG to operate, so it will not work as a standalone product. Stratus 2i is $500.

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The affordable, all-in-one ADS-B Out solution

For too long, ADS-B has been expensive and complicated. Not anymore. The company that revolutionized ADS-B In with the Stratus™ series of portable weather receivers has done it again. Meet Stratus ESG, the affordable, all-in-one answer for adding ADS-B Out to your panel.

All-in-one ADS-B Compliance

Many ADS-B Out avionics are incomplete, requiring you to buy multiple parts or limit your f...

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The affordable, all-in-one ADS-B Out solution

For too long, ADS-B has been expensive and complicated. Not anymore. The company that revolutionized ADS-B In with the Stratus™ series of portable weather receivers has done it again. Meet Stratus ESG, the affordable, all-in-one answer for adding ADS-B Out to your panel.

All-in-one ADS-B Compliance

Many ADS-B Out avionics are incomplete, requiring you to buy multiple parts or limit your flying. Not Stratus ESG. It has everything you need to meet the 2020 FAA mandate.

  • ADS-B Out transponder meets the 2020 FAA mandate
  • 1090ES technology – no altitude or geographic limitations
  • Integrated WAAS GPS for an all-in-one solution – nothing extra to buy
  • Replacement for your Mode C transponder – upgrade your old analog transponder
  • Qualifies for the FAA's $500 ADS-B rebate program

Fast and Affordable Installation

It’s not enough to have affordable hardware; the right ADS-B solution has to be affordable to install as well.
  • Fits in standard transponder slots – typically 50% less to install than remote mounted models
  • All-in-one unit - no remote boxes or control heads required
  • Complete kit includes all mounting hardware and GPS antenna

Flexible ADS-B In Options

Stratus ESG can also connect to a Stratus portable ADS-B In receiver. This makes it a complete system, with subscription-free weather and traffic.
  • Complete traffic picture in ForeFlight
  • Better ADS-B reception
  • Better GPS reception
  • Full-time power source
  • Works with Stratus 2, 1S and 2S (choose install kit above)
If you don't have a Stratus portable, but would still like to receive ADS-B In data, there is another option. Stratus 2i is a remote-mount, non-certified ADS-B receiver that connects to Stratus ESG. While it won't work on its own (there is no internal battery or GPS receiver), it is an affordable way to add ADS-B In to your airplane. You'll see weather, traffic, GPS position and backup attitude on your iPad, all send via WiFi. Simply select Stratus 2i above ($500).


Stratus ESG is made in the USA and includes a 2-year warranty. 


"Stratus ESG met or exceeded all my expectations."

  - Dave Hirschman, AOPA Pilot



Bezel Width6.38 inches (162 mm)
Bezel Height1.69 inches (43 mm)
Rack Width6.32 inches (160.4 mm)
Rack Height1.65 inches (42 mm)
Depth from back of bezel to end of strain relief on rack (not compensating for wire bend radius)10.75 inches (273 mm)

Stratus ESG Unit Weight2.75 lbs. (1.25 kg)
Stratus ESG Total Installed Weight (Transponder with rack and connectors)3.29 lbs. (1.49 kg)


Important Note

  • Stratus ESG should be installed by an approved Appareo dealer - find a dealer here
  • Unit will be shipped to installer.


Additional Resources

John Zimmerman

Vice President, Catalog Division—Sporty’s Pilot Shop

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Browse 36 questions Browse 36 questions and 36 answers
I want to purchase now, have it sent to ME, not a avionics shop. is that possible?
A shopper on Jul 6, 2016
BEST ANSWER: "Unit will be shipped to installer."

Must be Apparel approved; i.e., avionics shop. So much for a cheap solution.
Is the ESG certified for a Piper PA24 Comanche?
A shopper on Jul 6, 2016
BEST ANSWER: There is not an STC yet for the PA24, but you can still install it in accordance with this guidance from FAA:
Is this ESG unit certified for a Cessna 150?
Will D on Jul 13, 2016
BEST ANSWER: The ESG is TSO'd and the initial STC is in a Cessna 172. However, you can install it in a Cessna 150 if done in accordance with this memo:
What does it use as the altitude encoder? Does it use the existing altitude encoder or is one built in?
A shopper on Jul 8, 2016
BEST ANSWER: It uses your existing altitude encoder.
There's no nearby approved avionics shop near me. I'd really consider purchasing this, if I could get it done by the avionics place at my home station, but they aren't on the list. Whats up with that? if install is so easy, why can it only be done by one of your "approved" shops...[and by the way, I've been to one of these approved shops (that is on your list) and wasn't happy with their work (on something else), so I'm surmising it must not be a we-want-you-to-use-a-higher-quality-shop for install kind of thing].
A shopper on Sep 22, 2016
BEST ANSWER: Because it's a transponder, it needs a transponder check before it can be returned to service. That means most A&Ps can't do it. If there's an avionics shop you'd like to use that's not on the list, let us know - Appareo is adding dealers all the time and they might be able to get yours added quickly.
I would like to have the unit sent to me to install in my Piper. I have my Commercial FCC license and can work on avionics and an air frame mechanic to take care of weight and balance and physical installation. Can it not be sent to me?
Alan S on Aug 25, 2016
BEST ANSWER: Appareo's policy is to ship certified versions of Stratus ESG to an Appareo dealer.
In the future, should I decide to give up ForeFlight and Ipad use, Will this unit still comply with the 2020 mandate as a stand alone.?
Bill H on Jul 10, 2016
BEST ANSWER: Yes, it will still comply. The unit is all you need to be 2020 ready, its ability to interface with ForeFlight and your iPad is dependent on the Stratus portable ADS-B unit such as a Stratus 2S, 2, 1S etc. Stratus ESG is the ADS-B Out portion, Stratus portable is the ADS-B In portion. Only ADS-B Out is required by the 2020 mandate.
What is the difference between ESG and ESGi?
A shopper on Jul 9, 2016
BEST ANSWER: ESGi is simply the ESG transponder (ADS-B Out) plus the Stratus 2i (ADS-B In). It's a complete kit.
As I read the previous responses to previous questions, it appears that sale of the ESG product is not available to AI's (IA's) to perform the install if they are not included as an approved dealer, yes or no? If the IA already does business with an entity that performs the transponder checks (for A, C, S, etc...) post repairs, will the ESG product be made available?
A shopper on Jan 23, 2017
BEST ANSWER: Currently the ESG is only sold to Appareo Dealer.
Will it work with a 1978 Grumman/American Tiger AA5B?
Steve S on Dec 26, 2016
BEST ANSWER: Yes it will work in that aircraft.
Will you sell it to me for my home built RV-6?
DALE B on Jul 12, 2016
BEST ANSWER: If you're not interested in the experimental version nothing prohibits you from installing the certified ESG in your experimental aircraft. We've already had others do the same.
does this communicate with Garmin 430w also?
Stephen W on Jul 7, 2016
BEST ANSWER: No, the GPS source is only used for the transponder and for use with ForeFlight on an iPad.
According to Adventure Pilot their I-Fly 700 will work with Stratus via a "serial wred (I assume that is "wired" ) connection". Does the Stratus ESG have this capability?
Clinton S on Feb 11, 2017
What is the current draw? And do you have an online manual?
A shopper on Sep 15, 2016
BEST ANSWER: This is the manual for the installation of the experimental version, but it gives a lot of details:
Will the stratus with Adan in option display traffic on a garmin mx20?
A shopper on Apr 20, 2017
BEST ANSWER: I assume that you meant with an ADS-B in option. The Stratus will not display traffic on the Garmin mx20
Do you have the STC paperwork approved for a Single Engine Piper Comanche PA-24-260??
Brian H on Apr 16, 2017
If I purchase the stratus ESG transponder will i need to upgrade my Garmin 430 Gps to a 430Waas?
robert p on Apr 4, 2017
BEST ANSWER: No, The ESG Transponder has a WAAS GPS.
You state that the Stratus ESG will work with the Stratus 2i, I have a Stratus 1s (that I love). Is the ESG compatible with my Stratus 1s and my iPad?
Greg H on Mar 29, 2017
BEST ANSWER: Yes the 1s will work with the ESG, the ESG is the out portion of ADS-B while the Stratus 1S/2S/2I are the in portion of ADS-B.
Do you have a system that is economical for Gyroplanes?
Thomas E B on Mar 26, 2017
BEST ANSWER: This is the only ADS-B out system that we sell.
Will it work in a 1966 Mooney M20C?
Pilot J on Mar 17, 2017
BEST ANSWER: Yes, it is designed to replace the current transponder and is compatible with 97% of the air data encoders that are in use today.
I dont see this question below. I have a 172N with 24V system, and an old school 6-pack avionics with an MKM and ARC radio, and encoding altimeter without RS 232. Any issues with STC and installation? I want to have both ADS-B in and out, and Ipad is the preferred screen choice.
jakeflake316 on Mar 7, 2017
BEST ANSWER: None that I am aware of. You may need a different encoding altimeter. This will supply the ADS-B out. You would still need the Stratus 1s or 2s for ADS-b in with the iPad.
Is Stratus still only useful with Foreflight, or can other EFBs use it?
Thomas B on Feb 23, 2017
BEST ANSWER: The stratus 1S/2S is not compatible with Foreflight and Garmin Pilot app.
Will this work with a 12 volt aircraft?
A shopper on Feb 16, 2017
BEST ANSWER: Yes it will work with the 12 Volt Aircraft.
Can a Stratus ESG be installed in a 1975 Grumman Yankee (AA-1B) and will it easily replace an AT50a transponder with its encoder?
Clinton S on Feb 11, 2017
BEST ANSWER: Yes it will replace the old transponder and is compatible with 97% of all of the air encoders.
I have a 1967 piper cherokee 6. Is the unit compliant ?
richard b on Dec 25, 2016
BEST ANSWER: Yes the unit will install in a Cherokee 6.
What is the difference between the experimental ESG and certified ESG transponder?
Bob F on Dec 24, 2016
BEST ANSWER: The ESG Experimental is the exact same unit as the certified. The certified unit include all required documentation that is required by the FAA. The documentation is not required by and experimental aircraft.
Compatible with Paper Warrior I (PA28-161) and GNS430W?
Rick M on Nov 13, 2016
BEST ANSWER: Yes it is.
Can the ESG be installed in the Allegro SLSA? Does it matter which version?
Louis V on Nov 10, 2016
BEST ANSWER: The experimental version should be fine, but I would check with your aircraft manufacturer to make sure. Usually, LSAs require a service letter to authorize the installation.
Does the ESG require the altitude encoder to have RS-232 output, or can it accept parallel?
A shopper on Oct 8, 2016
BEST ANSWER: Parallel is fine.
will unit be shipped directly to me if installing in experimental?
Ron W on Sep 26, 2016
BEST ANSWER: Yes it will.
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