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Winco 25PTOC-3 - 25 kW Tractor-Driven PTO Generator (540 RPM)

Winco Electric Generators and Accessories
Model: 25PTOC-3
(Based on expert analysis, manufacturer ratings and customer reviews)

4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
18 Reviews
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Estimated Availability
December 27, 2017
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  • Features
  • Specs
  • 8
  • 18
  • Articles
  • Shipping
  • Accessories
Run Watts
Rated Watts
Surge Watts
Starting Watts
Convert Your Tractor Into a Generator
Use your tractor engine to generate electricity
Requires 50 PTO HP to operate properly

Multiple Applications
Generate electricity to power tools on the farm or ranch
Backup your home, barn or buildings during a power outage

Mainline Circuit Breaker
Protects generator and appliances from overload

Large Voltmeter
Easily monitor your power usage right from your tractor seat

Cast Iron Gear Case
Rugged, high-quality material designed to weather the outdoors

Full Power Anderson Style Receptacle (Includes Anderson Plug)
Perfect for hooking up a manual transfer switch

1-1/8 Keyed Connection
Designed for the Winco 540 RPM tumbling bar (44804-000 Splined Adapter Sold Separately)

Transport your PTO generator with a trailer (sold separately)
Product Specs
120/240 Single-Phase
60 Hertz
Auto Voltage Regulation
Surge Watts
25000 Watts
Rated Watts
25000 Watts
Rated Amps
104 @ 240 Volts (Single Phase) Amps
Voltage Meter
Tractors HP
50 HP
540 RPM
Grade Type
NEMA 5-20R - Wall-Type
NEMA 6-50R
Full Power Receptacle
Made in USA
330 Pounds
Product Style
PTO Generator
Product Length
28.5 Inches
Product Width
15.7 Inches
Product Height
19.7 Inches
Consumer Warranty
3 Years
Download Documents

NEMA 5-20R (Wall-Type)
NEMA 6-50R

Full Power Receptacle
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  8 Questions
Q: Hi, I am seeing the same Winco 25kW PTO generator in a brushless model on ebay. Do you have that model available?

by Jeff from Minnesota on November 24, 2013

A: Per the Winco specification sheet this model is only available with the brushed type alternator/generator......

RAB Type - Rotating Armature Brush Type

Specification Sheet

by Mike, Product Expert
Q: My 2013 Diesel Ram 2500 Pickup was purchased with the PTO Prep Package.

Do you offer any products that would allow me to connect a 20KW+ PTO Generator to my truck?

by Vincent Britton from Florida on September 09, 2013

A: Thank you for your interest in Electric Generators Direct!

While the vehicle connections will vary from one manufacturer to the next, you will most likely require a tumbling bar and possibly a six-spline adapter. Each of these you can find listed below...

Six-Spline Adapter

540 RPM Tumbling Bar

by Mike, Product Expert
Q: I'm interested in a PTO generator. I like the Winco 25PTOC-3, but the specs say a 50 HP tractor is needed. Mine is 45HP. Is that enough?
by Bob Williams from Arkansas on February 12, 2013

A: Sorry, your 45HP tractor is not enough to properly power the Winco 25PTOC-3 generator.

Proper sizing is based on the PTO HP and is sized as 1000 watts for every 2 PTO HP.
by Mike, Product Expert
Q: What type of oil is used in Winco 25PTOC-3 generator?
by George. Lewis from Virginia on August 20, 2012

A: Check the generator gear case oil level before each use of the generator. Maintain the oil level at oil level plug height.

The generator is shipped with lubricant in the gear case. Specifications for gear case lubricant are:

API Service: GL-5
Grade: SAE 85W-9O-140
Amount: 2 pints

The following kinds of oil are recommended for use in the generator gear case:

Mobil SAE 85W90-140 API Service GL- 5, Sunoco/DX XL80W90-140 Kendal Three Star 85W-140, Amoco 85W140 or equivalent.

CAUTION: Equipment Damage

Do not overfill generator gear case. Overfilling causes overheating and oil seal failure. Change the oil at least once every six months. Change it more often if you use the generator in bad weather.

by Mike, Product Expert
Q: What's the PTO horsepower needed to run the 25 KW generator and what iRPM should the tractor be set at for normal operation?
by Ed Hensley from West Virginia on July 23, 2012

A: This unit requires 50HP at the PTO as the sizing rule of thumb is 2 PTO HP for every 1000 watts.

The RPM will vary depending on the load.....

Start the tractor and use the gage on the generator to set your rpm. Then and only then apply load.

You meter will drop then adjust your tractor rpm (idle) to the green zone.

There is a small boost on that generator for an up surge in power so tractor RPM does not need to be changed if a surge is required.

by Mike, Product Expert
Q: How many rpm's does your tractor have to turn to run this generator?
by David from Virginia on July 12, 2012

A: A rather complicated question but here goes....

Start the tractor and use the gage on the generator to set your rpm.

Then, and only then, apply load.

You meter will drop then adjust you rpm (idle) to the green zone.

There is a small boost available on the generator for an up surge in power without idle issues on the tractor.

by Mike, Product Expert
Q: Jim - What transfer switch will the 25ptoc-3 require to be able to hook up to my power pole and run power to my house and outbuildings.
by Dallas Neumann from Idaho on March 19, 2012

A: The following 100A and 200A outdoor manual transfer switches are available to work with their PTO generators....

Winco 100A Outdoor Manual Switch

Winco 200A Outdoor Manual Switch

by Mike, Product Expert
Q: Jim - I have a JD 5410. I believe the PTO is rated at 65 HP. I would like to be able to drive entire house including water pump, heating, and all electrics. What would you recommend? Thanks. Joe Adams
by Joe Adams from New York on March 12, 2011

A: The largest PTO generator you can use is 32.5kW which is based on 1000 watts for every 2 HP. The larger the generator the more items you can power and less stress on the unit. Winco does produce and exceptional product and this 25kW model would work great in your application.

We do recommend that a certified electrician validate your wattage needs to verify this unit is not undersized.

by Mike, Product Expert
Winco 25PTOC-3 Reviews & Ratings
Overall Rating
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
Easy To Use (6)
High Quality (5)
Price (4)
I'd Buy It Again (3)
Quiet (3)
Bad Instructions (2)
Spline adapter should ha... (1)
No videos of unit being ... (1)
Heavy (1)
Need to add more informa... (1)
100% of respondents would recommend this product to a friend
18 Reviews  Sort by 
Mike, the Generator Expert
Electric Generator Expert

Product Expert
Total Reviews
103 Reviews
Total Helpful Votes
10758 Helpful Votes
Electric Generators Direct Recommended

Winco has been a manufacturer of quality PTO generators since the 1950's with the original goal and purpose of keeping American farms operational at a time when frequent power outages were the norm. Their PTO generators are reliable, safe and sought after to this day.

This 25kW from Winco offers you more power, but will require additional HP from your tractor. The rule of thumb is that you need about 2HP for every kW of power. So in this instance you are looking at a minimum of 50-HP... more
Mike Recommends This Model
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manufacturers review image

From The Manufacturer
The 25PTOC-3 has been certainly our best-selling PTO generator. This generator comes with great features such as maintenance free bearings, Square D circuit breakers, protective PTO shield, Lifting eye and a 4-wire Anderson full power plug included. The cast iron gear case has a 540 RPM, 1-1/8th inch keyed input shaft. A purchase of a spline adapter is necessary to convert the input shaft to fit a 6 spline power shaft.
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Phillip A.
Farmersville, TX
Purchased from Electric Generators Direct
Purchased 1/27/15
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Don't Settle For Less
We live "out in the country" and every time it rains we lose power. I looked at every option available, including standalone standby units from Generac. In the end I didn't want to maintain multiple engines and fuel types. I have a 50 hp diesel tractor so we went with the Winco 25PTOC-3. We now have about 40-50 hours on the unit and it works like a champ and I don't worry about what to power. This thing runs the whole house, a/c, stove, oven, refrigerator,freezer ,the whole house.... more
Pros: Easy To Use, Durable, Reliable
Phillip Recommends This Winco Product
Phillip's Experience With Electric Generators Direct
Web Site


"I never had to contact EGD. The unit arrived on-time as ordered and works as designed."
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Gloucester, VA
Purchased from Electric Generators Direct
Purchased 9/1/17
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Unit
First let me say, I had NO trouble removing the gear oil plug to check the oil level. Yes, the unit is heavy, but it takes a lot of iron, copper and other parts to generate 25 kW. I bolted my unit down to a concrete floor in a shed, cut a hole through the wall and backed the tractor (Ford 3930) to the PTO shaft I bought with the generator. The unit performed it's maiden test flawlessly. We have a very large house, 2 heat pumps, 2 refrigerators, 80 gallon water heater, 240 volt deep well for... more
Pros: Price, Quiet, Fast
Eric Recommends This Winco Product
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Robert N.
Lakeland, FL
Purchased from Electric Generators Direct
Purchased 9/11/17
5 out of 55 out of 55 out of 55 out of 55 out of 5
It was a great unit and recommended for anyone.
Pros: High Quality, I'd Buy It Again, Price, Easy To Store
Cons: Bad Instructions, Need to add more information on what is needed to make it work
Robert Recommends This Winco Product
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Derrell M.
Statesboro, GA
Purchased from Electric Generators Direct
Purchased 9/3/17
5 out of 55 out of 55 out of 55 out of 55 out of 5
This Was An Excellent Choice
I was without power for eight days during Hurricane Matthew and vowed toot to chance t again. I did a lot of research and finally made the decision to purchase a PTO driven generator and put my tractor to good use in case of the approaching Hurricane Irma. We were lucky that Matthew took out the older weaker trees and Irma didn't have the impacts we had during Matthew.

My son and I got the generator ready fired the tractor up used the full voltage Anderson connector and made an hour long... more
Pros: Easy To Use, High Quality, Quiet, Price
Derrell Recommends This Winco Product
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Gregory H.
Evergreen, NC
Purchased from Electric Generators Direct
Purchased 10/28/16
5 out of 55 out of 55 out of 55 out of 55 out of 5
Heavy Duty Very Industrial
Great generator and works as advertised. I hooked it up and it powered my whole house for an hour just as a test run. I ran my heat pump, deep well pump, two fridges and a chest freezer and various lights throughout the house. Appears to be as advertised. I was only pullig about 30 amps on each leg on my run. So it had a lot more left. The tractor ran as if no load was on it. The rpm rating of 540 at pto is a little deceptive. I have a John Deere 5103 and I have to run tractor... more
Pros: Easy To Use, High Quality, Durable, I'd Buy It Again
Cons: Heavy, No videos of unit being operated behind a tractor.
Gregory Recommends This Winco Product
Manufacturer Response
Brand Rep
Thank you for taking a moment to write a review. If you continue to have seepage of oil from the gearcase, please contact our technical support team at 507-357-6831 and see if the can help resolve the issue. Thank you for your input and we will see if we can get a PTO video in the works!
Gregory's Experience With Electric Generators Direct
Web Site


"Cheapest price I found. I told a fried about website and he has an order in right now for a 10kw portable generator. He is just waiting for his check to clear so order can be processed."
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Henderson, TN
3 out of 53 out of 53 out of 53 out of 53 out of 5
Gear Oil Plug Issue
The gear oil plug in my new generator was so tight that I could not get it off with a regular wrench. It is a 7-16" square plug head. I tried all the methods I had used in the past to no avail. A regular 7-16 box head wrench would just slip off because it would not seat all the way. So I called the customer service POC of the generator company and was told I need to get a square socket. Good advice if you have one or can find one.

Since I did not any square sockets, I started... more
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Summit, MS
Purchased from Electric Generators Direct
Purchased 9/6/12
Total Helpful Votes
53 Helpful Votes
4 out of 54 out of 54 out of 54 out of 54 out of 5
Works Good
I had order my Winco and received it 2 weeks later. I unloaded it and about 35 min later had the frame for the 3 point put together and ready to hook to my Tractor. The gear oil plug is tight and very difficult to remove to check the oil level. I connected it to our outside power pole service disconnect. I am running my whole house on a double 100amp breaker. The generator has handled my 2200 sq/ft house with two 3 ton AC units, water heater, water pump, two refrigerators, deep freeze and... more
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Noblesville, IN
Purchased from Electric Generators Direct
Purchased 11/13/12
Total Helpful Votes
48 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Upgraded My Old Pincor 13kw
I inherited my fathers old 13Kw Pincor generator. It wasn't big enough to run my new house and the circuitry wouldn't allow the frequency and voltage to match up properly.

The 25Kw Winco handled the load at the right voltage and frequency.

Please note if you order one you will need the PTO shaft adapter.

The generator comes with just a smooth 1-1/8" shaft that is keyed and drilled.
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Jena, LA
Purchased from Electric Generators Direct
Purchased 11/8/10
Total Helpful Votes
43 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
The Best Generator And The Best Company
I recently bought a Winco 25kW PTO generator from Electric Generators Direct. Jim Baugher is the GREATEST. He is extremely knowledgeable about all generators especially PTO Generators. I ordered over the internet but Jim called me at my home to be sure the order was complete.

He worked with Jeff Harmon at the Winco plant DIRECTLY by phone and email to get me the right generator and accessories.I had some questions after I got the generator and called Jim at EGD. I spoke with him directly,... more
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Clarence H.
Ponca City, OK
Purchased from Electric Generators Direct
Purchased 12/21/13
Total Reviews
2 Reviews
Total Helpful Votes
31 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Product & Great People
I ordered the 25ptoc-3 along with the PTO adapter. Everything arrived earlier than projected, ready to hook up and go. I mounted on a 3 point carry all. Works great. I had some questions before and after purchase and tech support was very timely. Look for the anderson plugs on the internet. I am considering ordering another one smaller and will definitely buy from EGD. Cudos to ABF freight also. Was the best.
Pros: Durable, Easy To Use, High Quality, I'd Buy It Again
Clarence Recommends This Winco Product
Clarence Would Recommend Electric Generators Direct To A Friend
Web Site


"Dealing with EGD was a pleasant experience. They answered all my questions, both before and after purchase in a very timely manner.The unit was sold out and had to be back ordered and EGD kept me up to date."
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We currently CANNOT ship this product to Canada or any destination outside of the United States
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