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The Voltmaster pto15/12 - 12 kw tractor-driven pto generator (540 rpm) is available for purchase today.

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Voltmaster PTO15/12 - 12 kW Tractor-Driven PTO Generator (540 RPM)

(Based on expert analysis, manufacturer ratings and customer reviews)

4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
31 Reviews
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Run Watts
Rated Watts
Surge Watts
Starting Watts
Need Help? Ask Our Generator Experts.
Convert Your Tractor Into a Generator
Use your tractor engine to generate electricity
Requires at least 24 PTO HP

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

3600 RPM Brushless Alternator
Produces clean and safe electricity for sensitive electronics

Smooth Wave™ Voltage Regulation
Provides <6% total harmonic distortion & +/- 6% Voltage Reg

Thermal/Magnet Circuit Breaker
Protects generator and appliances from overload

Standard Voltmeter
Makes it easy to monitor your power usage

Standard 1-3/8” Six Spline w/ Helical Gears
Connect tumbling bar (sold separately) between tractor and PTO

Added Features
PTO safety shield

Product Must be mounted to a trailer or concrete slab.

  Model Number:PTO15/12
 Made in USA:Unknown
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Tractors HP/CC:24 HP
 Rated Watts12,000 Watts
 Surge Watts15,000 Watts
 Rated Amps:50 Amps @ 240 Volts (Single Phase)
 Auto Voltage RegulationNo
 Voltage MeterYes
 Weight:159 Lbs. (72.12 kilograms)
 Dimensions:29"L x 10.875"W x 16H
(73.66 x 27.62 x 40.64 cm)
 Consumer Warranty:5 Years
 Commercial Warranty:5 Years
Download Documents

NEMA 5-20R (Wall-Type)
NEMA L14-30R

NEMA 14-50R

*Ask Mike about the Voltmaster PTO15/12. Sorry, no repair questions:




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  7 Questions
Q: Does the voltmaster pto15/12 generator have a cast iron gear box?
by Glenn from Virginia on January 11, 2014

A: Per Voltmaster/Wanco the gear box housing is cast iron.

by Mike, Product Expert
Q: Would this be a good choice for a John Deere 2320 which the manual states produces 18 HP at the PTO and a total of 24 HP at the engine [crank]?
by Kirby from Ohio on July 23, 2013

A: Thank you for your inquiry....

Unfortunately this generator is too large for your tractor. The proper sizing of a tractor to a PTO generator is 1000 watts for every 2 PTO HP. With your unit having 18 HP at the PTO the largest generator you could go with would be 9kW (9000 watts).

Your tractor does not produce enough power output to the PTO generator for it to produce the proper wattage or the proper Hz/Voltage and if connected to your unit you could damage the PTO generator and the equipment you are connecting it to.

Our smallest unit is a 10kW by IMD and with it being borderline with your tractor output we recommend that you contact IMD to confirm it would work.

IMD - (864) 968-0858

Models - PTO 10-2S & PTO 10-2S AVR

by Mike, Product Expert
Q: I have a old farmall 230 farm tractor will it drive this generator?
by Don Wackerle from Michigan on May 11, 2013

A: PTO generator sizing is based on the HP at the PTO and can be calculated using the following....

1000 watts for every 2 PTO HP.
by Mike, Product Expert
Q: Any problems using this exposed to the weather? Not all the time, just during power outages when it will probably be raining or snowing.
by Will from Kentucky on December 26, 2012

A: Per the owner's manual these units are not to be run in rain or snow.

Owner's Manual

by Mike, Product Expert
Q: I have ordered the 12/15 Kw voltmaster pto generator from your online store, unfortunately the factory has a back order problem with parts so not sure when I will receive the generator, but would like to know what plug types I will need to hook up when I receive it.
Thanks, Joe

by Joe Croisant from Texas on August 11, 2012

A: The unit comes with the following outlets.....

by Mike, Product Expert
Q: Bought a voltmaster pto15/12 generator with a 50 amp plug and a reliance transfer switch. The reliance switch came with a 50 plug with 3 prongs. It says it needs a CS6365 power cord plug type. Do you have cords to connect generator to plug in wall in garage.
by Bryan from Connecticut on April 05, 2012

A: The following cord has the correct connections to connect the generator to the Reliance Switch.

Gen-Tran 50A 25ft Cord

This cord has the following ends.....

by Mike, Product Expert
Q: Some of your generators say tractor horsepower and some say PTO HP which is it? I have a 35hp tractor with a 25hp PTO what is the biggest gen I could have hooked up to it?
by Rob Bridges from Illinois on January 31, 2011

A: The HP rating is based on the PTO HP and when looking at your PTO HP output the estimated generator size is based on the following: 1000 watts for every 2 PTO HP so for your 25HP PTO you can use a maximum 12,500 watt generator.
by Mike, Product Expert
Voltmaster PTO15/12 Reviews & Ratings
Write Review
Overall Rating
4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
Easy To Use (8)
I'd Buy It Again (5)
Price (5)
Durable (3)
Features (2)
Packaging (1)
Rain Prof It (1)
Amp Meter Broken After T... (1)
I Don't Have Any Dislike... (1)
100% of respondents would recommend this product to a friend
31 Reviews  Sort by 
Mike, the Generator Expert
Electric Generator Expert

Product Expert
Total Reviews
99 Reviews
Total Helpful Votes
3790 Helpful Votes
Electric Generators Direct Recommended

This PTO generator offers you a great value for 12kW of power. You can back up power to your farm or your house for the price of a portable generator.

As long as you have a tractor with a 24-HP engine you really can't go wrong with this value priced PTO generator.
Mike Recommends This Model
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James G.
Purchased from Electric Generators Direct
Purchased 8/5/14
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Sweet Unit
I just received my PTO powered generator. The other day. Fast service.I chose to weld up my own 3 point carry all to mount it on. I made room for my Lincoln wire Feed welder on the platform, along with some tools. My tractor is a 1953 Ford Jubilee rated at 30 HP at the PTO.

We live on a ranch and we needed a back up power supply for the house, well, and shop. Now I can have power Any were I need on the ranch. Today I set the tractor engine to 540 PTO RPM , volt meter read 240 Volts and I... more
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Pros: Easy To Use, I'd Buy It Again, High Quality
James Recommends This Voltmaster Product
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Kenneth W.
Hanover, PA
Purchased from Electric Generators Direct
Purchased 9/12/11
5 out of 55 out of 55 out of 55 out of 55 out of 5
My Voltmaster Pto Generator Is Great
We've had our Voltmaster PTO generator for 2 years & had to use it a lot in those 2 years for power outages. It was reliable & never gave us any problems. It supplied my house with all the electricity that I normally receive from our power company.

The generator was made in the USA & there are warranty & repair shops scattered through the US. We have one of these warranty & repair shops within 1/2 hour from our home. This is very important because we don't have to... more
Pros: Durable, Easy To Use, Price, I'd Buy It Again
Cons: I Don't Have Any Dislikes About This Product
Kenneth Recommends This Voltmaster Product
Kenneth's Experience With Electric Generators Direct
Web Site


"Electric Generators Direct is a very nice company to buy products from. I am very happy with the Voltmaster PTO 15/12 12kW tractor driven PTO generator (540 RPM) that I purchased from this comopany. I've had other generators before & this is the best generator that I've had. It supplies all of the electricity that my total-electric home needs & it has a built-in voltage regulator so that I don't have to worry about surges in electricity that could damage my electronic equipment. I would recommend this generator to anyone & would not hesitate to buy from Electric Generators Direct in the future."
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Glenn J.
Poplarville, MS
Purchased from Electric Generators Direct
Purchased 4/12/14
5 out of 55 out of 55 out of 55 out of 55 out of 5
Voltmaster 15/12 Pto Generator
Arrived on date promised-truck driver helped load it onto tractor. Mounted it on modified jet ski trailer. Neighbors liked the set up Powered by my Kubota 29 hp tractor or by the John Deere.. Will be much more reliable than the 15KW gas Generac that gave me many problems. Have not had to use it, but seems to be okay. Great buy-great company to deal with.
Pros: Easy To Use, I'd Buy It Again, Price, Easy To Store
Glenn Recommends This Voltmaster Product
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Henry E.
Ogdensburg, NY
5 out of 55 out of 55 out of 55 out of 55 out of 5
Excellent Product For Your House
Purchased Voltmaster PTO Generator in the event of a power outage for my residence. Have used the generator on several occasion without issue. I power the generator with a Kubota 29hp tractor. The generator has been mounted to a "Carry All" purchased from TSC for $129.00.
Pros: Easy To Use, Price, Features, Reliable
Henry Recommends This Voltmaster Product
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Charles B.
Cullman, AL
4 out of 54 out of 54 out of 54 out of 54 out of 5
Good Gen
Hard to get it delivered. Used two times and amp meter will not work.
Pros: Easy To Use, Price, Features
Cons: Packaging, Amp Meter Broken After Two Uses
Charles Recommends This Voltmaster Product
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Roger N.
Spring Grove, VA
Purchased from Electric Generators Direct
Purchased 7/23/14
5 out of 55 out of 55 out of 55 out of 55 out of 5
Nice Unit!!
I am a industrial electrician and diesel mechanic of 23 years by trade, so when I find equipment for my home, built to a standard that would be equal to or better than most industrial/commercial applications I take my hat off... I hope it last. But so far, Nice unit!!
Pros: Easy To Use, I'd Buy It Again, Durable, Light Weight
Cons: Rain Prof It
Roger Recommends This Voltmaster Product
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Ogdensburg, NY
Purchased from Electric Generators Direct
Purchased 10/28/12
Total Helpful Votes
31 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Generator
I received Generator on Friday. Went to tractor supply and bought the CountyLine® Carry All, Category 1 Quick Hitch (130 dollars,and PTO drive shaft for 150 dollars. Mounted steel plate to carry all. Mounted generator to plate and was running my whole house with electric dryer,220 well pump,

Furnace and any other thing I could turn on by 7 pm Friday night. No issues at all.
Will note that I recommend you purchase a (kill O watt meter for 20 dollars to plug into one of the 110 volt... more
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David B.
Allentown, PA
Purchased from Electric Generators Direct
Purchased 11/2/12
Total Helpful Votes
24 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
I ordered this generator from EGD after Hurricane Sandy 2012. We had a similar event on the East Coast last year about the same time that left us without power for 5 days. Again in 2012, Sandy was another 5 days without power.

With the gas being the most common fuel for portable generators and the effect Sandy had on the East Coast, NJ and NY ran low on gasoline. I decided on this type of generator as I have a Cub Cadet 7 series Subcompact tractor that could run the PTO driven generator.
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Ron L
Simpsonville, KY
Purchased from Electric Generators Direct
Purchased 7/18/12
Total Helpful Votes
18 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Voltmaster Generator
Solid generator for the money. Hooked it to a 36 hp mass & ran a house with 3 1/2 ton a/c, fridge, freezer chest, all lights & microwave going.

No problems. Ready for the next power outage.
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Steve P.
Jarrettsville, MD
Total Helpful Votes
16 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Good Generator For The Money
I bought this generator after a storm that knocked out power for 3 days. My welder/generator did just fine, but 1.5 gal of gas an hour was a bit much. I bought this pto generator, made a 3 pt hitch frame and bought a driveshaft at Tractor Supply, and tested it out and had no problems. Summer of 2012 we lost power in Maryland for 4 days. This generator ran about 102 hours continuously with no problems powered by a John Deere 1026r sitting beside a 300 gal diesel tank. PERFECT.
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Total Helpful Votes
14 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Pto Generator
I fabricated my own frame for this PTO generator when all I had was a 650 JD rated at 14 PTO hp. Although It was only good for producing 5 or 6 Kw with that tractor, it worked flawless. I did use a frequency meter to check against the pto setting on the tach and it is amazing, the tach is close enough. It's always 59 to 61 htz. Now with the 37 hp tractor it will play with this generator.
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