pto backup generator

   #42  

bdhsfz6

Veteran Member
Joined
Apr 11, 2015
Messages
1,072
Location
Northeastern Pennsylvania
Tractor
Kubota MX5800 HST & L6060 HSTC Formerly L6060 HST B7100 HST, L2550, L3010 HST, L3430 HST
I have a 12KW Baumalight trailer mount generator I've been using for 10 years now. For weather protection, I leave the generator in the barn with the tractor outside and close the overhead door so it just clears the driveshaft. Although the trailer mount takes up a bit more floor space, I find it quicker and easier to hook up than a 3pt mount.
 
   #43  

sandyc

Veteran Member
Joined
Mar 26, 2003
Messages
1,652
Location
Steep Falls, Maine
Tractor
BX 2380
I used to have a 8kw gas portable but getting up in the middle of the night to fuel it was a pain. Looked at the pto he set but finally settled on a Koehler 12kw fueled by propane. Our fuel supplier got tired of servicing the pigs and made me a deal. If I would dig a hole they would give me a 500 gallon tank. Works great and supplies my shop heater, space heater in my inlaw apt, stove in main house, and the generator. As noted in a previous note having your own well is great but you need a constant supply of power to get any water.
 
   #44  

VroomVroom

Platinum Member
Joined
Apr 30, 2010
Messages
982
Location
Newfoundland
Tractor
Mahindra 2816 HST, Super M farmall, J5 bombardier, 230 timber jack skidder
15000 watts divided by 746 watts per Horsepower is around 20 HP at the pto to run the gen set, would this be correct? Or do you need a little more for spikes in load? Just wondering what the rating are on those as the little tractor I have only has 21 or 22 pto HP if I remember correctly.
 
   #45  

bdhsfz6

Veteran Member
Joined
Apr 11, 2015
Messages
1,072
Location
Northeastern Pennsylvania
Tractor
Kubota MX5800 HST & L6060 HSTC Formerly L6060 HST B7100 HST, L2550, L3010 HST, L3430 HST
15000 watts divided by 746 watts per Horsepower is around 20 HP at the pto to run the gen set, would this be correct? Or do you need a little more for spikes in load? Just wondering what the rating are on those as the little tractor I have only has 21 or 22 pto HP if I remember correctly.

Your math assumes 100% efficiency which no generator is capable of producing. Allowing for losses, 21 pto hp is adequate for a 12 kw generator at 100% load. Of course you can use a larger generator but 21 hp will not allow 100% output. If you put too much load on an under powered generator, you run the risk of voltage drop which can damage electrical equipment.
 
   #46  

ruffdog

Super Member
Joined
Dec 31, 2011
Messages
7,478
Location
southern wisconsin
Tractor
Bobcat Toolcat 5610 G series w/turfs
I heard you should figure 2hp per kw....is that still a good figure?
 
   #47  

ning

Veteran Member
Joined
Mar 30, 2017
Messages
1,668
Location
Northern California
Tractor
Branson 3520h
I'd be concerned about getting a consistent 60Hz cycle out of a pto generator powering circuits in a house due to varying load, since the tractor throttle isn't governed.
 
   #48  

Sawyer Rob

Super Member
Joined
Dec 5, 2014
Messages
7,466
Location
Upper Mid West
Tractor
several brands
I'd be concerned about getting a consistent 60Hz cycle out of a pto generator powering circuits in a house due to varying load, since the tractor throttle isn't governed.
A tractors throttle IS governed! Set the throttle under an average load and the tractors governor takes care of the spikes...

2hp per 1,000 watts will keep everything cool and allows for a long service life...

SR
 
Last edited:
   #50  

ning

Veteran Member
Joined
Mar 30, 2017
Messages
1,668
Location
Northern California
Tractor
Branson 3520h
A tractors throttle IS governed! Set the throttle under an average load and the tractors governor takes care of the spikes...

2hp per 1,000 watts will keep everything cool and allows for a long service life...

SR

Good to know!
 
 
Top