Stratus ESG ADS-B Transponder - Certified Aircraft

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Up to a $1300 rebate


Wiring Harness not included

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/3.

Stratus 3i

Stratus 3i 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 3i is $500.

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Availability: In stock

Product ID: 16800A

Transponder Trade-Up Program.

Get up to $1300 rebate when you trade in your skyBeacon, tailBeacon, or GDL 82! Click here for details.

The affordable, all-in-one ADS-B 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-on...

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Transponder Trade-Up Program.
Get up to $1300 rebate when you trade in your skyBeacon, tailBeacon, or GDL 82! Click here for details.

The affordable, all-in-one ADS-B 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

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 portable ADS-B In receiver, including Stratus 2, Stratus 1S/2S, Stratus 3, Dual XGPS 170/190, and Garmin GDL 39/39 3D. This makes it a complete system, with subscription-free weather and traffic. Plus, you retain the valuable backup capability of a standalone ADS-B receiver.
  • Complete traffic picture in ForeFlight
  • Better ADS-B reception
  • Better GPS reception
  • Full-time power source
  • Works with Stratus 2, 1S, 2S and 3 (choose install kit above)
  • Also works with Dual XGPS 170/190 and Garmin GDL 39/39 3D (requires separate kit)
If you don't have a portable, but would still like to receive ADS-B In data, there is another option. Stratus 3i 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 3i above ($500).


Stratus ESG is made in the USA and includes a 5-year warranty. 

UAT Trade-Up Program.

Get up to $1300 rebate when you trade in your skyBeacon, tailBeacon, or GDL 82! Click here for details.

"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)


Additional Resources

Buy Now, Pay Later

An ADS-B transponder is a major investment, and now there's an easy way to make paying for it a little more convenient. For a limited time, PayPal Credit is offering no payments and no interest if paid in full in 6 months on purchases of $99 or more. Just choose the PayPal option at checkout. 
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Eric Carnahan

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Would You Recommend?
Stratus ESG Transponder
I chose the Stratus ESG package as an affordable ADSB in/out solution, and have been flying with it for 3 years in my Grumman Tiger. As a VFR pilot, this transponder and an iPad running Foreflight is all that I need to fly anywhere. The transponder itself is very simple to operate in flight, and extremely easy to read. As a WAAS GPS source for my iPad, it has always been rock solid. Current air traffic and weather just appear magically, and I love being able to see everything that ATC can see.
Appaero Stratus in Grumman AA5B Tiger
Appaero Stratus in Grumman AA5B Tiger
July 17, 2019
5 / 5
5 / 5
5 / 5
Ease Of Use
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Would You Recommend?
The Way To GO
I debated on how to comply with the 2020 mandate and decided to go with the Stratus ESG in my Grumman Tiger. I'm glad I did. The installation was straight forward and typical. The ADS-B standards check and performance was simple and everything worked as advertised. I use the Stratus 2S for ADS-B In on my ipad and couldn't be happier. So far I'm very pleased with the performance, ease of use and appearance of the transponder.
July 19, 2018
5 / 5
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Would You Recommend?
Only ADS-B IN if you use ForeFlight
I purchased one of these and am very disappointed, it only works with ForeFlight and has been specifically locked out for use with other EFPs, my EFPs worked with the original Stratus RXs but the latest has been locked out so if you want to lock yourself into only one EFP then this is your transponder. I am having the stratus ADS-B IN RX removed from my plane. Stay away unless you don't want EFP options.
April 3, 2018
Response from Sporty's Pilot Shop
Stratus ESG is totally self-contained for ADS-B Out, and does not require any connection to an app or a portable receiver. Once you have ADS-B Out in your airplane, you'll see a complete traffic picture on your tablet if you use a portable receiver - no matter what app and what receiver. The only compatibiliy issues are if you want to directly connect (by wire) your portable ADS-B receiver to Stratus ESG, which would allow for full-time power and the use of external antennas. Currently, Appareo offers portable connection kits for Stratus 2, 1S, and 2S, plus Garmin GDL 39 portables, and a Dual XGPS portables:
April 20, 2018
John Zimmerman Staff
Question and Answer
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 58 questions Browse 58 questions and 60 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.
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
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.
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.
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:
I was sold on your product until I realized it had to be installed by one of your approved installers. Every airplane owner has "their guy" they have used for years to maintain their individual aircraft. Someone that knows every detail of the aircraft. It is unfortunate that my mechanic will be unable to install this product. He installed my Garmin 430W, STEC 30 Autopilot, and JPI engine monitor. I'm sure after looking at the install manual, he is more than capable of installing the tray. antenna, and harness in 8 hours, not 20. Very unfortunate, I really felt like this product was my answer. will the product be offered to individual purchase before 2020?
robert m on Dec 8, 2018
Stratus ESG ADS-B Transponder - Certified Aircraft
Stratus ESG ADS-B Transponder - Certified Aircraft
Stratus ES ADS-B Out Transponder
Stratus ES ADS-B Out Transponder
Stratus ES ADS-B Out Transponder (certified)
Stratus ES ADS-B Out Transponder (certified)
BEST ANSWER: It is very easy for your avionics shop to become a dealer. Just go to
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.
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:
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.
I have an encoder that stops altitude transmission at 14,500 feet. Will the GPS still transmit altitude above 14,500 with the alt on the transponder deselected?
Jon F on Nov 10, 2018
BEST ANSWER: No, the encoder is what supplies the altitude information to the transponder.
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.
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.
Why does it take 20 hours of install time -- when its a slide in replacement for my transponder??!!
A shopper on Sep 22, 2016
BEST ANSWER: You will need to install a new GPS antenna (because it's WAAS) and run the wiring for that. The rest of the install is basically power/ground, then connecting to your existing altitude encoder and your existing transponder antenna on the belly.
Can it share a GPS antenna? / I Already have a GPS antenna for my Garmin 430
John S on Jul 15, 2016
BEST ANSWER: Yes you can use a GPS splitter, however make sure the GPS is a WAAS GPS (430W in this case). Also note that using a splitter may require a field approval. Check with your avionics shop.
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.
can i print out an owners manual on the Stratus ESG ? i cant find any info out on appareo website where do you get that info ?
Jimmy E on Jun 11, 2017
I found an owners manual (guild) at penn yan flying club . Com. ( all one word ). I read up on the stratus there before I bought it. Also, you can find many helpful videos on YouTube. I love mine and I had it checked out in class-B airspace after installation. I hope this helps you out. Happy flying!
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:
Does this work with FlyQ EFB or just Foreflight?
A shopper on Feb 2, 2020
Stratus ESG ADS-B Transponder - Certified Aircraft
Stratus ESG ADS-B Transponder - Certified Aircraft
Stratus ESG Connector Kit for Dual and Garmin ADS-B Receivers
Stratus ESG Connector Kit for Dual and Garmin ADS-B Receivers
BEST ANSWER: The Stratus 3 will work with FlyQ in open ADS-B mode.
If I get the ESG with the 3i option, do I connect my iPad to the 3i through wifi just like I was doing with my 2S?
A shopper on Jan 25, 2020
BEST ANSWER: Yes, that is correct.
Is this unit certified as the ones required to fly in Class A Airspace? Certified for install in my Cessna 340?
Morgo on Dec 26, 2019
BEST ANSWER: Yes, it is for certified aircraft and there are no altitude restrictions (it's 1090 mHz).
Is this unit compliant above 18,000?
A shopper on Dec 4, 2019
BEST ANSWER: Yes, there are no altitude restrictions.
Do you have a pitot static connection like Garmin available?
James L on Jun 21, 2019
BEST ANSWER: This transponder uses your existing air data encoder.
So to confirm - it requires a separate ADS-B in receiver to well to display traffic? This is only an "out" solution?
Flaherty on Jun 17, 2019
BEST ANSWER: That is correct. This is only an OUT solution.
Is this unit a 948 or a 1090?
David B on Feb 3, 2019
BEST ANSWER: This unit is 1090.
Will it fit in a KT76 slot?
Dennis A on Jan 28, 2019
BEST ANSWER: Yes, it should fit in the slot.
can the stratus hook up with my apollo mx20 color mfd ?
john s on Nov 8, 2018
BEST ANSWER: It will not.
Is this certified for PAR 135 operations?
A shopper on Nov 4, 2018
BEST ANSWER: It is approved providing the aircraft is on the STC List. Available at
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