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Go Back   BHM Forum > Homesteading > Energy > Conventional Oil/Gas

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  #1  
Old 05-26-2007, 05:11 PM
szimmer szimmer is offline
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Default continuous duty generators?:

Hello.

I am looking for a small continuous duty generator that I can run all the time (24 hours - 7 days a week). I am flexible with the range (2kW - 5kW).

Anyone have some good ideas. Of course, diesel seems to be the way to go.

Thanks for the help in advance.

Simon
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  #2  
Old 05-27-2007, 11:46 AM
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DavidOH Male DavidOH is offline
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Default Re: continuous duty generators?:

I have a Yanmar. 10hp *6500 watt.
(modified by manufacturer)
10 hp I think is the smallest diesel they make.

Runs at 3600 rpm.

Better would be if you could find one that runs at 1800 rpm.

http://www.yanmar.com/
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  #3  
Old 05-29-2007, 10:47 AM
szimmer szimmer is offline
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Default Re: continuous duty generators?:

Yeah, everyone seems to be saying the same thing. Find a low rpm AC diesel generator at 1800 rpm. Unfortunately, we have not found any that makes them?



I appreciate the help.

Simon
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  #4  
Old 05-30-2007, 07:55 PM
wax wax is offline
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Location: St Peter Minnesota
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Default Re: continuous duty generators?:

szimmer- everyone seems to be saying the same thing

Wax- Yes, they all say the same thing.
They are all absolutely right, but don't worry so much about it.
Grab what you can find, can afford, and what works for now.
Do this with the understanding that you are saving for a better system.

Within a few years you will come across something (and because replacement was in the back of your mind you will grab it) that you were not even looking for.
Our local Onan plant folded back in 1998. At the auction no one bid on the back up power supply... no one but me of course! (There was one other guy but more on that later)

I knew for a fact that any power plant designed to supply back-up power to an Onan factory was exactly what I wanted!
My wife of course knew for a fact that I was insane!

I won't tell you what I payed for it (but I will say that my brother started crying when he heard the price because he realized that his power needs were filled as well as mine. The current bid for the unit I bought is $31,000 on Ebay and I didn't pay ten percent of that!).

The point is nobody wanted it, the only other bidder was hoping to scrap it.

Remember that articles here are great because they give both an example of frugality and point out what would be best in most cases.
But each and every step is a good step.
Start with what you can and keep in mind that you would really like something better.

BTW: By the time you get something "better" you will know someone who could really use what you didn't want to begin with! Before long you will have started a revolution!
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  #5  
Old 05-30-2007, 09:37 PM
DM DM is offline
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Default Re: continuous duty generators?:

You can get low RPM generator heads, and mate an older tractor motor to it. The motor will already have the governor ect.. to make it work.

My own gen set is a PTO generator that i power with a small diesel tractor. Works pretty good for me..

DM
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  #6  
Old 06-09-2007, 10:58 PM
Gunnywag Gunnywag is offline
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Default Re: continuous duty generators?:

Look at the product catalog pdf file on this site:
http://www.easterntools.com/
The DG20LN runs at 1800.
price not mentioned.

Hope it helps.
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  #7  
Old 08-13-2007, 11:06 PM
Gunnywag Gunnywag is offline
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Default Re: continuous duty generators?:

Here you go:
http://hardydiesel.com/gen/8kw.html
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  #8  
Old 08-14-2007, 04:52 PM
DM DM is offline
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Default Re: continuous duty generators?:

Those Hardy gensets are made in China... I keep seeing folks who buy them, and when they get some hours on them the problems start... It's the motors i keep hearing complaints about... Most say they wish they had bought domething else...

Personally, i'd stay away from them...

DM
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  #9  
Old 08-14-2007, 06:15 PM
machinemaker machinemaker is offline
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Default Re: continuous duty generators?:

you might want to check the military auctions in your state. Web address is www.govliquidation.com. unfortunately they are usually large diesel generators 50-100 kw, but cheap if you do the repairs. I bid on a 75 kw, cat diesel for backup and 3 ph 480 VAC for my shop and it was $1850.00 it needed some basic maintenance and TLC, however its big enough to run several homes.
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  #10  
Old 01-16-2008, 02:52 AM
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DavidOH Male DavidOH is offline
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Default Re: continuous duty generators?:

Ran accross this today:

http://shop.sailnet.com/product_info...|wire.jpg

It's called a mid-range speed.
There are 2 sizes 3.5 and 5.5kW.
A 10 hp, 2-cylinder Kubota diesel engine.
Runs at 2800 rpm instead of 3600.

Their boast is the small size: Dimensions are just 23" long x 17' wide x 20" high, and dry weight is only 230 lbs.

It's expensive. Made for boats..... but I'm wondering if the land version will be made soon.
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  #11  
Old 03-05-2008, 01:35 PM
morgantruce morgantruce is offline
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Default Re: continuous duty generators?:

Twenty years ago I bought a (then) new Onan 4KW 1800 rpm generator meant to go into a recreational vehicle. I didn't own an RV, but I did have a remote homesite in need of backup power. It's been washing clothes, pumping water, and charging a bank of batteries whenever the sun refuses to shine. Once in a while the unit starts to "hunt" around a bit and I have to fool around with the mixture and/or governor--but other than that, I've had no mechanical problems to speak of. I just changed the unit's AC and DC brushes---and I expect this generator to keep on plugging away for another twenty years.

My unit is a 4.0BFA--with a sleeved aluminum block. Other dandy Onans I am aware of are the older LK and CCK with cast iron blocks (2.5 to 6KW). A local Onan (now Cummins) mechanic told me: "Take care of what you've got... anything newer is a pile of garbage compared to the older models."

Keep your eyes peeled for an older Onan. I've seen quite a few older models for sale that were used as "stand-by" units---in other words, they were hardly ever used. Most RV units are also low hours. It's only folks like us --who use these things to power our houses--who really pile on the hours.

Hold out for a unit that spins at 1800 rpm--but as a previous poster warned, do be wary of Chinese-made equipment. I know of three people with that sort of equipment--and all three have had continuing serious mechanical and electrical problems.

I'm not claiming that (older) Onans have NO problems; just that the problems are of a minor nature and within the ability of a reasonably skilled backyard mechanic to deal with.
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  #12  
Old 03-05-2008, 03:41 PM
DM DM is offline
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Default Re: continuous duty generators?:

The older cast iron 1,800 rpm CCK's are what gave Onan a reputation for being stone reliable...

When they went to aluminum and started turning them at 3,600 rpm, that reputation went down hill fairly fast...

I still have an old 5K CCK out in the barn that i say i'm going to use some day... It hasn't been run in a long time, but you just know i'm gonna do it "some day" lol

DM
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Limit all politicians to two terms: One in office, one in prison. Illinois already does this!

Illegal immigration is ruining America, look what it has done to the White House.
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  #13  
Old 03-09-2008, 04:25 PM
BIGGKIDD Male BIGGKIDD is offline
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Default Re: continuous duty generators?:

If your serious about 24/7 running spend the bucks or look up Listeroids on the net and build yourself a gen. that will last a life time. They are huge and heavy. But a unit that can cary 3kw continuous load on around 1/4 gal. of fuel Diesel, Kero, WVO,WMO, or even used tranny fluid from what I have read. It will burn about anything that can burn.

Let us know where your search lands.

Larry 8)
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  #14  
Old 03-09-2008, 11:11 PM
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flatwater flatwater is offline
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Default Re: continuous duty generators?:

I'm a little lost here but why would you want one to go 24/7 or do you mean it will just have to run quite a bit?
Flatwater
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  #15  
Old 06-22-2008, 09:24 AM
YoYoDog YoYoDog is offline
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Default Re: continuous duty generators?:

BIGGKIDD is correct. If you are reasonably mechanically inclined listers or listeriods (fake listers) are the way to go. They don't make them in the states anymore. You have to get them imported from India or rebuild a used one if you are lucky enough to find one because they are in such high demand. If you are willing to invest the large amount of time to get involved with them then go to utterpower.com and read, read, read. If you are thinking about off grid power I think they are the only way to go.

JMHO,
Dan
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  #16  
Old 06-27-2008, 08:10 PM
JAK
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Default Re: continuous duty generators?:

What would you need to do to modify a desiel engined designed to
run most efficiently at 3600 rpm to run most efficiently at 1800rpm?

My guess is the horsepower would be 50%, perhaps less.
The efficiency might not be quite so high, but it might be close.
Might be just as efficient as a Listeroid though, maybe better.
If it was done right you might get twice the life out of it also, hour that is, not kwh.
If I did this I would get my hot water from it also.

So how about it? 3kw 1800 rpm Yanmar? Could it be done?

This might all be moot with the price of oil though.
Wind power or solar power might be the better way to go.
Unless you did something in the way of wood fired steam power. Small scale.
I would also like to try making my own batteries. Cheap.
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