Plane Power Powerflex Voltage Regulator - R1224

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14V / 28V, replaces Ford, Electrodelta, Prestolite, Interav, Wico, FVR, and more voltage regulators. (Refer to Model Eligibility for your more information and additional models)

The Plane Power R1224 Voltage Regulator is a solid-state voltage regulator with over-voltage protection, field short (over current) protection, and reverse battery protection. The Plane Power R1224 Voltage Regulator also supports precision load sharing for twin applications, and an alternator inoperative lamp.

NOTE: The R1224 voltage regulator is designed to be setup in the field for 14 or 28 volt operation by configuring the two jumpers within the voltage regulator.

Some applications require accessory part number 07-03532. See Application Guide for requirements.
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You had it in stock and promptly shipped it. Great service as usual!

John S
April 26, 2021

Excellent product.

Russell R
January 22, 2021

Excellent and easy to install...thanks Spruce

December 30, 2020

Ship fast and priced well.

Jim W
April 11, 2020

Have Lyc-320 engine overhauled my A&P Has replaced several of the factory alternators with the plane power alternator and regulator and said they worked out great I’ll be another month before mines done

Ken M
December 30, 2019

Solved my voltage problem!

September 20, 2019

Used to replace my old InterAv regulator. Was more work than just replacing the regulator (some re-wiring) but works great.

Matt A
August 30, 2019

Installed it, it works.

Christopher S
August 14, 2019

I had been chasing alternator problems, it would come online then off again. My C172 (1965 F) had standard Cessna voltage reg and Electrodelta over voltage sensor. Narrowed it down to faulty Over voltage sensor. Cost to replace about same as plane power R1224-14v. Easy decision for me. Get rid of separate device and upgrade newer technology to all in one. Tech support was extremely knowledgeable on pre-purchase questions. Install was a breeze. Everything changed out and adjusted in less than 30 minutes, and no more alternator problems problems. I even got back my over/under voltage warning indicator that someone had disconnected who knows when? Even if it goes out in 3-5 years as some say, $190 bucks is a cheep throwaway, and I’ll be glad to get a new one.

William G
December 24, 2018

Easy to hook up and works right out of the box , replaced a Over Votage relay and regulater at the same time that is no longer avalible , saves room for being small in size

Blaine W
April 2, 2018


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: Do the Plane Power Powerflex Voltage Regulators listed on this page provide noise reduction as well?

Per the supplier: No, these units are not equipped with noise reduction.

Q: Does this Plane Power Powerflex voltage regulator replace InterAv P/N 625-61623? 14 volt Neg ground?

Yes, per the Fit Guide PDF in the "Application Guide" tab of the web page, part number R1224 (our part number 07-01305) will replace InterAv 625-61623. However, we recommend that you verify your aircraft application using the fit guide to confirm it is the correct replacement.

Q: Is the 12-1021 adapter plate included?

No, the 12-1021 adapter plate is not included but can be purchased separately.

Q: What's the difference between the R1224 and R1224B products? Which one is appropriate for E-AB aircraft? Which one is compatible with the Plane Power C14-100 alternator?

The only difference between the two products is the mounting base. Both would be appropriate for an E-AB aircraft along with the Plane Power C14-100 alternator.

Q: Does the unit come with wire connectors that fit the terminals on the regulator? Does not appear that the existing aircraft terminal ends will fit the regulator.

Yes, this will come with the connectors.

Q: What is the warranty period of the Plane Power R1224 voltage regulator?

All warranty issues / requests on this regulator must be handled direct with Plane Power:
New: 36mo/1000 operating hours whichever comes first
Overhauled: 6 months / 250 operating hours whichever comes first

Q: Does the unit come with connectors? there were none in my package

No, wire connectors are not included.

Q: What is the ring terminal size required for the terminals?

These use #8 terminals.

Q: Are these FAA/PMA?

Yes, these are FAA PMA approved.

Q: What are the General Dimensions of the Plane Power R1224 product?

Approx 3 by 5