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+$200 Core Exchange Charge
Part# 07-01321
MFR Model# ER14-50


12/14 volt, 50 amp, replaces Generators on Small Block Continental Equipped Aircraft All new design is engineered specifically for aviation offers:
  • FAA approved for many certificated aircraft
  • Higher reliability
  • Lighter weight
  • Significantly improved electrical output at low engine RPM's
  • Vastly Improved electrical performance
Included in these STC'D kits is a new Plane Power alternator, Plane Power voltage regulator, hardware, and mounting brackets needed for replacing that old, heavy, low-output generator with a new Plane Power Alternator!
(Twin-engine kits include two of each)
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Great product. Lacking or erroneous instructions. Says you can use original light if equipped. Also had to call tech support because unit was overcharging and popping output breaker. They said a direct wire from alternator output to sense on regulator is needed instead of the the jumper from the field terminal it comes with. Other than that, the alternator and regulator are quality items.

William K Verified Purchase


June 29, 2021

Hsppy. With unit.

Ricky L Verified Purchase


June 18, 2021

Bought the kit for the Generator to Alternator Conversion, and it was straight forward, and fairly easy to do. Its great not having to worry about electrical power anymore, especially since we have a Uavonix AV 30 for the Artifical Horizon now., I can turn on the high beams and the alternator will take the load Thanks. only down side its expensive, but what is not in an airplane

April 22, 2021

Night and day change for my j5 Cub. Full voltage at idle with landing taxi lights, nav lights, radio, sooooo happy. Battery staying fully charged. Replaced my Delco Remy generator and so easy. One evening of effort.

William T
August 30, 2019

Put this on A C172 with an O-300. It is a great upgrade!

Brock B
June 13, 2019


Please note, Aircraft Spruce'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 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: What is the normal current draw of the field of the 14-50 alternator?

Per Hartzell, "Field current varies with the amount of load requested by the bus. However, we do recommend a 7.5 amp circuit breaker be installed in the field system at installation."

Q: I am replacing a generator with the ER-50 alternator. Will you accept the generator as the core for the alternator?

Yes, this would be an acceptable core.

Q: How long are the leads on the pre=wired field plug? Thanks

This is 144".

Q: Does ER14-50 kit include the install kit ER14-GR or does that need purchased separately?

That is not included. It is only needed if you dont have the gear assembly or if your gear assembly is unusable.

Q: what is the is the length from the flange face to the end? what is the diameter of the body? Does the unit come with the drive on it?

The gear is not included. It is 5.6 inches from the flange face to the end and it is 4.2 inch in diameter.

Q: Does this unit come as pictured? Your picture shows the gear installed. If the unit does not come with the gear, can you update the picture? Thanks,

This does not come with the gear, you would need to reuse your gear. We will be updating the photo soon.

Q: Can the alternator be clocked in any direction? Does the stub have to remain pointing upward?

The installation instructions do not mention a specific clocking when installing.

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