PTO generator?

Brother had one on his acreage, beleive it was a Generac unit. Was a bit expensive but the voltage was well controlled an clean. Wanna watch the cheap ones cause they aren't always well controlled.

Nice thing bout that was ya had the tractor fer other things to rather then just a dedicated motor waiten fer the lights ta go out.

 

This is our 15KW unit. Look for my post from last Feb 13-15 timeframe about our week without power in the blizzard and it details some of the experiences we had with the generator, among other issues and adventures. Sorry about the bad pic quality-took this with my cell phone.

 

Personally, I don't care for a PTO model. The main reason being that when the power goes out, it's normally due to bad weather and therefore, the tractor may be needed elsewhere for other chores.

Another consideration is matching your tractor's HP to the needs of the generator. I can't tell what mfgr or size tractor Jason has but would guess it's probably the right size for a 15KW genset. If your tractor engine is over-sized for the generator being used, you're burning more fuel then you need (as you still need to keep the engine RPM's up to get 540RPM to the PTO).

You'll also want to size the genset to your needs. A couple years ago, I bought a 15KW genset and sold my 7.5K to a friend. Well, the 15KW couldn't really do any more then the 7.5KW. Basically, both ran the entire house except the heat pump. The 15KW just burned more fuel (and made more noise). Although I still have that 15KW, I went out and got a 7.5KW as it's the "right size" for most of my needs. I'll use the 15KW once in awhile so Mrs. Zoom can do laundry or whatever but for 90% of the time, it's just too big.

OK, back to your question. I took a look at the Northern Tool offerings. Northstar makes decent generators. BTW, their 7200w for $979 is more then what I paid for a 7500w Honeywell genset with a Honda engine (at Costco) earlier this year.

 

That's an 85 HP John Deere. It's got both a 540 and 1000RPM PTO. The generator has a shaft with splines for a 540 shaft but we have an adapter and use the 1000 to run it, letting the generator make full power with the tractor only running at 1100 RPM. It used roughly 10 gal of fuel every 24 hours. No good for long term but definately ok for a week or so here and there.

 

Careful careful careful...

Make sure the generator maintains 60 hz if you are going to run a fridge or washing machine, or you'll BURN THEM OUT.

That means 1800 RPM for a 4 pole generator or 3600 RPM for a 2 pole generator. (generator speed, not pto speed)

Get a Hertz meter to check the output... 58 hz to 62 hz range is OK, if it deviates much more than that either way, you're in for trouble, believe me -been there, seen that happen many times!

You can run your saws and drills (all brush motors) ok, and any incandescent lights and resistance heaters are ok, but Induction Motors will burn out if the hz count is off!

Kill-a-watt makes a power consumption meter that has a Hz Meter built right in it... just plug it between the generator output and an appliance.
http://www.p3international.com/products/special/P4400/P4400-CE.html

http://www.partsfortechs.com/asapcart/hertz-frequency-panel-meter-3-12-110-120v-p-117.html

http://www.omafra.gov.on.ca/english/engineer/facts/00-057.htm#frequency

 

We noticed right away that some things weren't acting right so we quit using the sensitie stuff and most of the electronics. Basically we ran lights, the furnace, and the pump on the spring, which of course only runs when needed. We didn't touch the computer all week, but the TV seemed to do ok. It's an old cheapie so we'd not have been out much if it crapped out. No dishwasher either. Thanks for the tips though.

 

Jason, the Kill-a-watts only cost $25 at Home Depot...

A lot cheaper than burning something out...

Good insurance, cheap!

Just set your tractor engine speed to where the Kill-a-watt meter stays at "60" hertz, that's all you have to do, simple as that.

I've got a PTO generator from Northern tool... it's a 3600 rpm, so I never used it, I'll mount it in my lobster boat with v-belts on the diesel engine so it will run 3:1 when the engine is running at 1200 rpm.