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Author Topic: Back up generator advice needed  (Read 1405 times)

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Offline 47sawdust

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Back up generator advice needed
« on: November 03, 2017, 04:40:39 pm »
I want to purchase a back up power unit.What I have in mind is 5-6kw,1800 rpm water cooled diesel.
I know most folks use propane but I prefer not to go that route.Any suggestions would be appreciated.
Central Maine diesel has some affordable units,but I know nothing of their build quality.Marine diesel generators are a possibility but a little spendy.
Thanks,Mick
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Offline scsmith42

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Re: Back up generator advice needed
« Reply #1 on: November 03, 2017, 07:04:25 pm »
Find some local generator service companies and see if they have any good, used take-outs.

My local guy frequently has low hour, good used units that were removed from service.  Local telecom sites, etc, may exceed their generator capacity when they upgrade their equipment.  This means that their old, perfectly good units are replaced with higher capacity ones.

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Offline Klicker

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Re: Back up generator advice needed
« Reply #2 on: November 04, 2017, 07:52:06 pm »
What ever you get every couple of months start it up and let it run. This kips it working and fresh gas or fuel in it. Rod
2006 LT 40 HD

Offline Coltbodi

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Re: Back up generator advice needed
« Reply #3 on: November 04, 2017, 08:47:16 pm »
Since you have that Kubota you could look into a pto driven generator. It's one less engine to keep running, but it does tie up your tractor when the lights go out. But you can get a bigger unit for less money since you aren't buying the motor with it.
If I can't fix it, I don't want it.
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Offline woodmaker

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Re: Back up generator advice needed
« Reply #4 on: November 04, 2017, 08:49:30 pm »
I went with diesel too.I'm not sure what you want to run,but if you want whole house capability ,5-6k might be a little small.I had a 5 k gas,and it worked well for lights etc,but wasn't big enough for well pump and furnace at the same time. Three years ago,I bought a used 12 k at the local generator installers open house. I set it up to run off my heating oil tank for the furnace,and this past week,it had it's first good test.We lost power for 36 hrs,and after sorting out some fuel line issues,(I put a ball valve in the suction line to prevent drain -back when changing filters;it allowed air to get in the suction line,then into the filters) we had good ,reliable  power,and actually used very little fuel
franklin q80,builtrite 40,husky 372,sachs dolmar 123, dozers,excavators,loaders,tri-axle dump trucks ,autocar tractor with dump,flatbed and detachable trailers, and 8  f350 diesels

Offline Runningalucas

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Re: Back up generator advice needed
« Reply #5 on: November 04, 2017, 09:56:43 pm »
We've had a 12kw kubota with a main 200 amp transfer switch.  Our power does go out a couple times a year during winter; usually no more than a couple days max. 

Gotta be careful to not wet stack it; usually we'll actually increase the load by just turning on the electric heat.


Offline 47sawdust

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Re: Back up generator advice needed
« Reply #6 on: November 05, 2017, 05:21:34 am »
Thanks for the response.We have gravity feed water,wood heat with a Rinnai propane heater for backup,so as long as we don't use the dryer,no big demands.
 I'm doing some research on used light tower generators.The Magnum mlt 3060 has either a Kubota or Mitsubishi 3cyl,1800 rpm motor driving a Marathon 1800 rpm 6kw gen head.Some have extremely high hours,but I found a unit i Mass. with 445 hours.110 and 240 outlet.
 They seem like a good fit for my situation.I thought about the pto unit,but I like the idea of the self contained and trailered feature of these light towers.Just take the lights off and put it in a small shed.The unit I looked at yesterday was very quiet.
 What does the "wet stack it" mean?
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Online thecfarm

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Re: Back up generator advice needed
« Reply #7 on: November 05, 2017, 07:26:00 am »
I have not started looking yet.
Kinda think I would like a PTO one. No rebuilding of the carb,which had to be done,on my generator that came off the Mayflower. I had not used it for more than 10 years.It works good,6000 watts. Sucks down the fuel.  :o  I just plug it into to the side of the house,flick 6 switches in the basement and I can run the furnace,water pump,a few lights and a few outlets.
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Offline North River Energy

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Re: Back up generator advice needed
« Reply #8 on: November 05, 2017, 07:28:44 am »
Out of curiosity, why the objection to propane?

Offline petefrom bearswamp

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Re: Back up generator advice needed
« Reply #9 on: November 05, 2017, 07:54:58 am »
x2
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Offline 47sawdust

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Re: Back up generator advice needed
« Reply #10 on: November 05, 2017, 09:59:57 am »
Why not propane? We use $400.00 of propane a year.I would have to get bigger tanks or tank to support the genset.
 The trailer feature works well in my application.
I'm open to ideas.I'm just more at ease with the small diesel generator.
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Offline Runningalucas

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Re: Back up generator advice needed
« Reply #11 on: November 05, 2017, 12:01:41 pm »
http://www.ckpower.com/wet-stacking-avoid/

Wet stacking, or I 'think' it's also referred to as Carmelization.  It's where you run a diesel without the load necessary to make sure the temps are where they should be at.  Without the proper load, the generator will build a lot of carbon up in the cylinders, and onward.

When sizing the diesel generator, you're gonna need to make sure it's loaded sufficiently. 

Offline WV Sawmiller

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Re: Back up generator advice needed
« Reply #12 on: November 05, 2017, 12:13:09 pm »
47,

   Personal opinions but how much more would it cost to get a bigger tank? How responsive is your gas company to just refilling existing tanks more often if needed? Keep in mind you'd likely need them to come refill during power outages and emergency conditions. But that is also the conditions you will be out running around trying to find diesel unless you already have a big tank you are comfortable will support you during emergencies.

   I am lucky - I have natural gas. I bought and installed a 17 KVA Guardian genset. Six years ago we had a derrechio storm with hurricane force winds which knocked out power to the surrounding 5 states. Our power was out for 11 days. My genset has an ATS and cranked itself 10 seconds after the outage and ran for 11 days. The only time it was off was once for me to change the oil and a couple times to check the oil. No real maintenance required. Cranks itself weekly and runs 10-12 minutes to charge the battery. While we lost power we did not lose natural gas - I have never lost both at the same time in the 27+ years we have lived here. My neighbors were making daily trips to our one local gas station with power (genset) to run their pumps and waiting in line up to an hour to get the $20 limit/ration of gas to run their small gensets. Others drove up to 100 miles down into VA to find fuel.  Neighbors brought food up to put in our freezer and extra reefer and to take showers since without power they had no water from their wells.

    Just more to think about. Good luck in your decision and search.
Howard Green
WM LT35HDG25(2015) , 2009 4wd Dodge PU, Kawasaki 650 ATV, Sthil 440 & 441, homemade logging arch (w/custom built rear log dolly), JD 750 w/4' wide Bushhog brand FEL

Dad always said "You can shear a sheep a bunch of times but you can only skin him once"

Offline 47sawdust

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Re: Back up generator advice needed
« Reply #13 on: November 05, 2017, 02:45:41 pm »
WV Sawmiller,
 You're points are well taken.I will have a conversation with my propane company.Our present account is set up where they only come fill the tank when it reaches 20%.It takes us 14 months to get to that point.That's 2- 120 gallon tanks.
 Our domestic hot water is heated by solar in the summer and wood stove water jacket in the winter which is supplemented by a 40 gallon propane heater.We cook with gas as well,although the wood cook stove does much of the work.No furnace,no water pump.
 The longest we've been down in the 40 years I've lived here was 3 days.The diesel just seemed the cheapest to get into,$3k for working 6kw genset.Perhaps my thinking is flawed and I need to do more homework.Thanks for all the input.
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Offline Kbeitz

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Re: Back up generator advice needed
« Reply #14 on: November 05, 2017, 03:00:41 pm »
I have not started looking yet.
Kinda think I would like a PTO one. No rebuilding of the carb,which had to be done,on my generator that came off the Mayflower. I had not used it for more than 10 years.It works good,6000 watts. Sucks down the fuel.  :o  I just plug it into to the side of the house,flick 6 switches in the basement and I can run the furnace,water pump,a few lights and a few outlets.

Why not turn you old gen-set into a PTO gen set.
I have done this to many generators .
It's not even a problem with the one with a tapered shaft.

 

 
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Offline gspren

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Re: Back up generator advice needed
« Reply #15 on: November 05, 2017, 03:31:45 pm »
  Reading this now has me thinking which usually costs me $$. I have a welder/generator with a 20 HP Honda engine that puts out 10K as a generator. I very seldom do any welding so it sits way too long between uses although I try to start it occasionally. I have a Kubota BX 2670 that would probably run a 10-12K pto generator and take up less room plus less maintenance and probably on less fuel. Any one use a pto gen on a little Kubota?
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Online thecfarm

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Re: Back up generator advice needed
« Reply #16 on: November 05, 2017, 03:34:45 pm »
Kbeitz,you are a cleaver one. Reminds me of my FIL.
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Offline woodmaker

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Re: Back up generator advice needed
« Reply #17 on: November 05, 2017, 04:31:25 pm »
I chose diesel over propane because I always have diesel fuel around,(skid tank for equipment,loaders ,dozers, dump trucks etc.) but would have to depend on someone else to bring me propane.I'm sure in an emergency,their bigger customers would get higher priority than a small residential customer .My feeling is "the fewer people i have to depend on in an emergency,the happier I am". I can always move diesel with a tank in my pickup,cant do that efficiently with propane. Just my thoughts
franklin q80,builtrite 40,husky 372,sachs dolmar 123, dozers,excavators,loaders,tri-axle dump trucks ,autocar tractor with dump,flatbed and detachable trailers, and 8  f350 diesels

Offline WV Sawmiller

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Re: Back up generator advice needed
« Reply #18 on: November 05, 2017, 06:56:04 pm »
47,

   If you have not ruled them out entirely for other reasons, if just pricing I'd check on the propane gensets. I checked Home Depot and a 20KVA was under $5K and a 9KVA was under $3K. Sounds like you may find they are much cheaper than diesel and less maintenance once you get one.

    I first saw them while we were building the Embassy in Haitii and was impressed with how small and quiet they were and since I have natural gas I opted for that. I think I paid around $3k for mine delivered and have a friend from the local electric company who installed it for me.

   Everybody's situation is different as to needs, equipment experience, availability of various types of fuel, etc. All this needs to be considered in making such a purchase. I will say I love my genset and knowing 10 seconds after prime power fails mine cranks and shifts power to local. During my 11 day use 6 years ago I think my natural gas bill went up less than my electric bill decreased.
Howard Green
WM LT35HDG25(2015) , 2009 4wd Dodge PU, Kawasaki 650 ATV, Sthil 440 & 441, homemade logging arch (w/custom built rear log dolly), JD 750 w/4' wide Bushhog brand FEL

Dad always said "You can shear a sheep a bunch of times but you can only skin him once"

Offline Kbeitz

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Re: Back up generator advice needed
« Reply #19 on: November 05, 2017, 08:25:23 pm »
If you like auctions and like to tinker you can save lots of cash...
I got a total of $50.00 in my 5kw system.

 

 

 

 

 

 

 

 

 

 

 

 
Collector and builder of many things.
I have a
machine shop
Wood work shop
And a Weld shop
And now a saw mill
and a bunch of new forum friends.