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what is the difference between the centurion series and guardian series and which is more recommended more and why?
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why would a wireing harness fail?
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Customer questions and answers for
Generac Power Systems 8kW-6245

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Customer questions and answers for Generac Power Systems 8kW-6245

Question

What is the surge wattage on a 8kW Guardian Series generator?

I am looking into purchasing a generac 8kW generator guardian series generator and can not find info on surge wattage. I am looking at powering well pump, furnace, refrig/freezer, deep freezer, tv microwave, and some lights.
State: PA - Pennsylvania
Age: 55-64
This product will backup: Entire Home
asked 2 years, 10 months ago
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Carl
Central PA
on 8kW-6245
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answer 1
The surge wattage is 1.5 times the running watts, so it's 12,000 watts for the 8kW. For a ball-park sizing estimate, please refer to our online sizing tool: http://www.generac.com/Residential/...

An authorized Generac dealer can provide a more detailed assessment. To find a dealer near you, use our dealer locator at: http://www.generac.com/Service/Deal...
State: WI - Wisconsin
answered 2 years, 10 months ago
Customer avatar
by
Generac
Waukesha
+1point
1out of 1found this answer helpful.
Question

Can I replace the 240 vac 30 amp breaker with two 120 vac 15 amp breakers

I don't need the 240 vac circuit
State: FL - Florida
This product will backup: Other
asked 2 years, 8 months ago
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by
norby
Rotonda West
on 8kW-6245
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answer 1
If you don't need 240 vac, then you probably don't have central air conditioning or an electric oven-range. Still, almost every home has 240 vac service, spit into two 120 vac circuits. That is, half of your home is attached to one circuit and the other half is attached to the other. If this is your situation, then you should just have an installer connect the generator in this matter. Use the dual 30 amp breaker. The generator produces the same service that you would need during an outage. It would probably be good to have an electrician or experienced generator installer involved.

Dan
Professional Engineer
State: MS - Mississippi
Age: Over 65
answered 5 days ago
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by
Dan
Gulf Coast
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answer 2
Yes
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
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by
Christmasman
Methuen MA
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answer 3
As long as it complies with your local building codes, this is acceptable.
answered 2 years, 8 months ago
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by
GeneracPowerSystems
+2points
3out of 4found this answer helpful.
Question

How can the utility connection use a 40A/240V breaker?

I understand that 40A @ 240V is the 8KW - that's OK. But the total of the circuits in the transfer switch is greater than this. (3 15A@120V, 3 20A@120V, 1 20A @ 240V, 1 30A @ 240V totals about 100A @ 240V).

I was looking for a manual describing the operation of the transfer switch but didn't find it. I've seen mention of load shedding and prioritized circuits and see that as a good thing while running the generator. But if I'm connected to the utility power, I don't want this to happen. Yet I don't see how you can run the utility power through a 40A break. If you try to run all the loads it'd trip. And I don't want load shedding while I'm connect to utility power.

So my question is how does this work when you have power from the utility? Does the switch do load shedding then? Or will the breaker trip? Neither option sounds good.
State: NH - New Hampshire
Age: 45-54
This product will backup: Entire Home
asked 2 years, 8 months ago
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marchhare
Amherst
on 8kW-6245
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answer 1
I can live with running only 33A while running the generator - we'll adjust our use of appliances, etc. But I don't want to have to think about that through daily life (i.e. I'm running the dishwasher now - better not use the microwave).

Since the transfer switch itself is capable of switching 100A, can I upgrade the utility feed to the transfer switch with the appropriate gauge of wire and use a 70A (or 100A) breaker? Do you see any problems with that?
State: NH - New Hampshire
Age: 45-54
This product will backup: Entire Home
answered 2 years, 8 months ago
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by
marchhare
Amherst
+3points
3out of 3found this answer helpful.
answer 2
Not all circuits will be pulling power at the same time, let alone the full amperage rating. The 40 amp breaker feeds the panel since the generator is capable of producing 33.3 amps.
answered 2 years, 8 months ago
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by
GeneracPowerSystems
+7points
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Question

I have two panels in my home. Can I use a second transfer switch with this system for the sub-panel?

State: MA - Massachusetts
Age: 55-64
This product will backup: Entire Home
asked 2 years, 7 months ago
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by
jon.h
Metrowest
on 8kW-6245
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answer 1
No. You will need to extend circuits from the second panel to the transfer switch. Be sure to extend the neutral, ground and hot wire for each of the circuits.
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
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by
Christmasman
Methuen MA
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answer 2
Yes, as long as it will not overload the system. We recommend discussing with an authorized Generac dealer for specific details about how this can work. To find a dealer near you, please visit http://www.generac.com/Service/Deal...
answered 2 years, 7 months ago
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GeneracPowerSystems
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Question

Is a concrete slab required as a base? or pea gravel? How thick?

I'm considering the 8kW Guardian series standby generator for residential use.
State: WA - Washington
Age: 55-64
This product will backup: Entire Home
asked 2 years, 7 months ago
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Caroline
Seattle
on 8kW-6245
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answer 1
Concrete pads require the generator to be bolted to the pad. It also increases the db levels. Use 3/4" stone bed base. Elimates vibration noise that can penetrate the interior of your house and will improve db levels.
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
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by
Christmasman
Methuen MA
-2points
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answer 2
Either base will work, but which base you use is determined by your local building codes. Please consult your local code authorities to determine if a concrete slab is required. If you are able to use a pea gravel base, it should be a minimum of three inches thick. The following instructions come from our installation guide (http://goo.gl/lLxga):

"Dig a rectangular area approximately five inches deep and about six inches longer and wider than the footprint of the generator. Cover with polyurethane film and fill with pea gravel or crushed stone. Compact and level the stone."

If a slab is required, it should exceed the length and width of the generator by a minimum of six (6) inches.

The dimensions of the 8kW Guardian Series are 48.3" long x 25.3" wide.
answered 2 years, 7 months ago
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GeneracPowerSystems
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Question

My NG comes in at one end of the house & my electrical service at the other. What size NG pipe do the 8 & 10 KW require?

I have the following feeding off of a 1" NG line - boiler 50 gallon/50K BTU hot water tank, clothes dryer & 250K pool heater. I would configure system so that pool pump & heater are NOT powered when on gen.
State: MI - Michigan
Age: 45-54
This product will backup: Entire Home
asked 2 years, 7 months ago
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fluded bment
Troy
on 8kW-6245
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answer 1
Of all generators (7-8-10-14) I've installed that used NG required 1 1/4" service entrance and a 3/4" line to the generator.
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
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by
Christmasman
Methuen MA
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answer 2
For an 8kW Guardian Series home backup generator, we recommend a 0.75" natural gas pipe that does not exceed 55'. This length includes three elbows and two T's. for the 10kW, we recommend the same size pipe, but only a 20' run. The required fuel pressure at the generator fuel inlet in either case should be 5 - 7" of water column.
answered 2 years, 7 months ago
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GeneracPowerSystems
+4points
4out of 4found this answer helpful.
Question

do i need a cold weather kit for a 8K Unit in MAINE

State: ME - Maine
Age: 45-54
This product will backup: Entire Home
asked 2 years, 7 months ago
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by
jim
hiram
on 8kW-6245
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answer 1
If you have temps that run below 32 degrees for 3-4 days at a given time I would go with the kits
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
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by
Christmasman
Methuen MA
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answer 2
Given that there are times when the weather in your area likely drops below freezing for an extended period of time, a cold weather kit would make for easier and more reliable starting.
answered 2 years, 7 months ago
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by
GeneracPowerSystems
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Question

How loud is this unit in decibals (dbA) within a ferw feet of the sound attenuating enclosure?

Any other distances for which you have sound level ratings would be appreciated.
asked 2 years, 7 months ago
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Ronnie
on 8kW-6245
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answer 1
Providing useful numbers within a few feet is far easier said than done and there are good reasons this is not specified.

The reason is that the generator is a physically large sound source and emits somewhat different sound levels in different directions. This is typical of large sound sources such as machine tools and vehicles. Thus, the loudness from only a few feet away will vary quite a bit depending on one's position in relation to the generator. The closer one is the more variation there will be. Whether one is sitting or standing will make a difference as well.

In addition, nearby surrounding objects, like the wall of a building can reflect the sound adding to the overall loudness, but this too will vary with one's position in relation to the wall and generator.

Lastly, the overall sound levels and the level at particular frequencies vary somewhat with the load on the generator.

The 62 dBA at 23 ft provided by Generac is likely an average of data measured at a number of points around the unit without any nearby reflecting surfaces. Close-in loudness variations become more uniform at distance as the different sound levels emitted from specific parts of the unit overlap and thus tend to average out. As such, sound levels at longer distances are the only really useful single numbers for these kinds of large sound sources.

Close-in measurements really need a detailed 3-D map of sound levels around the unit to be at all useful. However, such maps are only accurate for the specific measurement distance.

That said, a simplistic calculation says that at 6 ft one might expect average levels in the range of 75 dBA. However, at this distance there would be significant variations from this around the unit, complicated by any sound reflections from nearby walls or other large, solid objects and by the generator load.
State: ME - Maine
answered 2 years, 1 month ago
Customer avatar
by
Chuck
United States
+2points
3out of 4found this answer helpful.
answer 2
Under normal load at 23 feet away from the unit, the sound level is 62 dB(A).
answered 2 years, 7 months ago
Customer avatar
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GeneracPowerSystems
+1point
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Question

Will the 8kw unit be sufficient for a 1.5 ton central air conditioner unit?

i am trying to keep my costs down as much as possible and don't want to purchase the more expensive unit if I don't need it. I have a 1.5 ton central air conditioner and one of the preferred dealers is telling me I need the 10 or 14kw model in order to run it. However on Generac's site it recommends that the 8kw can handle a 3 ton system. I want to make sure I am not being overcharged for a system I do not need. Can I get away with using the 8kw unit? I would also have a furnace for winter and hot water heater along with a washer/dryer, fridge and freezer along with the main lighting I would need covered. Thanks.
State: IL - Illinois
Age: 45-54
This product will backup: Entire Home
asked 2 years, 7 months ago
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by
maddy
on 8kW-6245
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Answers
answer 1
I've installed over 50 generators in the last two years. I would not recommend an 8K system for what you want to connect to it. I would strongly recommend you consider at least a 14K machine. If you eliminate the AC you could get away with the 8K
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
Customer avatar
by
Christmasman
Methuen MA
+2points
2out of 2found this answer helpful.
answer 2
Yes, an 8kW Guardian Series generator can provide power for a 1.5 ton central air conditioning unit. However, your dealer is likely also considering the other loads you need to accommodate beyond the central air conditioner. Additionally, if your AC unit has an easy start kit in it and the compressor is in good condition, that can impact the amperage draw, and your dealer is likely taking that into consideration, as well.
answered 2 years, 7 months ago
Customer avatar
by
GeneracPowerSystems
+1point
1out of 1found this answer helpful.
Question

Does the enclosure meet fire codes to be 18" from house?

In the manual it states that the enclosure is sufficiently protective that the generator can be 18" from the house. But I found a letter from my state's fire marshal saying that it hasn't been proven sufficiently to meet the NFPA 37:4.1.4#2# exception from the 5 foot requirement. Since this letter is dated from May of 2010 I was wondering if it's just old info and Generac has provided proof. #I've attached the letter.#

I'd really rather not have the generator 5 feet from my house if I can help it.
State: NH - New Hampshire
Age: 45-54
This product will backup: Entire Home
asked 2 years, 7 months ago
Customer avatar
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marchhare09
Amherst
on 8kW-6245
+1point
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answer 1
Most state and local electrical codes do not accept the fire rating stated in the generac specifications. Consequently if you choose to place the unit closer than 5' and a fire originates from the generator which burns your house could be challanged by your home insurance provider leaving you in a potential financial loss.
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
Customer avatar
by
Christmasman
Methuen MA
+1point
1out of 1found this answer helpful.
answer 2
Unfortunately the local authority supersedes the 18" setback. We are working to gain acceptance of this distance in New Hampshire.
answered 2 years, 6 months ago
Customer avatar
by
Generac1
+3points
3out of 3found this answer helpful.
Question

overhead clearances to raised decking

I am installing a 8kw . Due to location of,and ease of gas line connection and electrical connections ,placing the generator under the raised deck is the best option. The pressure treated wood deck is 8 ft. above ground level and is 100% open on three sides.Clearances to openings into building and gas meters/ regulators are more than adequate.
What is the required overhead clearance to combustibles? Also I noted that the proper configuration of the sediment trap as shown in the installation manual seems to be in conflict with that required in National Fuel Gas Codes.
State: NH - New Hampshire
Age: 55-64
This product will backup: Entire Home
asked 2 years, 6 months ago
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lp4u
Belmont
on 8kW-6245
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Answers
answer 1
I can't imagine that your local building code would allow you to install this unit under a deck. Check with your local building inspector before proceeding.
State: MA - Massachusetts
Age: 55-64
answered 2 years, 6 months ago
Customer avatar
by
Christmasman
Methuen MA
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answer 2
Clearance at the top should be a minimum of 60 inches from any structure, overhang or projections from the wall. The generator should not be placed under a deck or other structure that is closed in and would limit or contain air flow.

Please refer to page 14 of the manual for more information on installation guidelines. A link to the pdf is below:

http://goo.gl/cuw3e
answered 2 years, 6 months ago
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Generac1
+1point
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Question

In heavy snow such as 20 to 36 inches do you need to clear

the sides, front and top of the unit. Is it okay to mount the generator on a steel frame base 18 to 24 inches off the ground.
State: MD - Maryland
Age: 45-54
This product will backup: Entire Home
asked 2 years, 3 months ago
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by
Windowman
Baltimore
on 8kW-6245
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answer 1
During times where snowfall is expected, you will want to ensure that snow and/or ice is cleared off of, and away from, the enclosure. There should be no snow piles or large accumulations of snow within three feet of the unit to ensure proper air flow if the unit were needed in an outage. If necessary, due to local codes or in areas with high precipitation, the unit may be installed on a structural steel base to elevate the unit. The base for the unit must be level, and meet all spatial recommendations in the manual, as well as comply with local and national codes.
answered 2 years, 3 months ago
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GeneracPowerSystems01
+1point
1out of 1found this answer helpful.
answer 2
ABSOLUTELY !
State: MA - Massachusetts
Age: 55-64
answered 2 years, 3 months ago
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by
Christmasman
Methuen MA
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Question

Can I run an 8kw standby generator on a 100 lb propane tank?

asked 2 years, 1 month ago
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Los
on 8kW-6245
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answer 1
The smallest propane tank we can recommend for use with our current 2013 and newer automatic standby generators that utilize an Evolution Controller is a 250 gallon tank. The answer above is referring to the 2010 Nexus Controller product only. The volume and pressure required for the unit can be located in the owner’s manual and installation guidelines that are provided with the unit. The fuel consumption for each model number can vary, and we recommend ensuring the documentation utilized reflects your particular generator’s model number. To locate a copy of the owner’s manual and installation guidelines for your particular unit, search the model or serial number here: http://www.generac.com/Service/Manu....
answered 1 year, 2 months ago
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GeneracPowerSystems01
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answer 2
The smallest propane tank we can recommend is a 120 gallon tank. The volume and pressure required for the 8kW unit utilizing liquid propane is 156,240 BTU/hr with 10-12” of water column.
answered 2 years, 1 month ago
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GeneracPowerSystems01
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Question

How long will 8 KW unit run on 100 lb propane cylinder

State: ON - Ontario
Age: 45-54
This product will backup: Refrigerator Freezer
asked 2 years, 11 months ago
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Bob
Taylor Island
on 8kW-6245
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answer 1
At full load, the 8kW consumes 1.68 gallons of LP per hour, providing approximately 14 hours of run time on a 100lb / 23.6 gallon tank.

It is more common for a unit to run at 50% load, so your actual hours may be higher. For more fuel consumption information, please refer to the 8kW spec sheet at http://www.generac.com/SpecSheets/0...
State: WI - Wisconsin
answered 2 years, 10 months ago
Customer avatar
by
Generac
Waukesha
+2points
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Question

Battery requirments for Air Cooled 8-14 KW units?

I understand the battery is not included with the units, so I would like to know the requirements so I can have the battery on hand when the unit arrives.
State: ME - Maine
Age: 45-54
This product will backup: Well/Water Pump
 
Products related to my question
 
 
asked 2 years, 10 months ago
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PRISM-MECHANICAL.COM
South Portland
on 8kW-6245
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answer 1
Generac offers the recommended 26R wet cell battery, Model 5819 for the 8kW - 14kW, in addition to the other available accessories described on the spec sheet (http://www.generac.com/SpecSheets/0...). To purchase this battery from a Generac dealer, please refer to our dealer locator at http://www.generac.com/Service/Deal...
State: WI - Wisconsin
answered 2 years, 10 months ago
Customer avatar
by
Generac
Waukesha
+1point
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Question

how long will an 8kw run continuously on 1/2-3/4 load?

i am running on backup rt now (thanks to Irene). i have never had to use it prior for long duration outages. i have 2/ 320 gal lp tanks. its been on for 24 hrs, may need them to be on for the next few days up to a week. i have sump pumps and they run constantly. anything i should be aware of runnin the generator? i just had it serviced a month ago, this generator hasnt run for more than a few hours since purchase.

Thanks,

Tom S. - in CT.
State: CT - Connecticut
Age: 45-54
This product will backup: Entire Home
asked 2 years, 10 months ago
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tms - CT
waterbury
on 8kW-6245
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answer 1
For liquid propane at ½ load, the 8kW uses 0.94 gallons per hour. Refer to the 8kW spec sheet for additional fuel consumption data. http://www.generac.com/SpecSheets/0...

We also recommend stopping the unit and checking the oil after 24 hours of straight operation and performing scheduled maintenance after 200 hours of operation.
State: WI - Wisconsin
answered 2 years, 10 months ago
Customer avatar
by
Generac
Waukesha
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Question

Breaker info

what breakers come in the switch for the 8kW unit?
State: PA - Pennsylvania
asked 2 years, 10 months ago
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BobH
southeast
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answer 1
Available breakers in the 10 circuit EZ Switch include:
3 - 15 Amp, 120 volt
3 - 20 Amp, 120 volt
1 - 20 Amp, 240 volt
1 - 30 Amp, 240 volt
Note - the 240 volt circuits take up 2 spaces. For more information on the 8kW and EZ Switch package, please refer to the spec sheet at: http://www.generac.com/SpecSheets/0...
State: WI - Wisconsin
answered 2 years, 10 months ago
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Generac
Waukesha
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Question

kw rating per phase or total output

I am looking at the 8kw unit and am wondering is the kw rating based on total output A+B phase or just per phase.
asked 2 years, 10 months ago
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sparkie
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answer 1
The output is the cumulative amperage available at 240V. Both 120 and 240V loads/circuits can be powered when it is connected to the automatic transfer switch and panel.
State: WI - Wisconsin
answered 2 years, 10 months ago
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by
Generac
Waukesha
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Question

Can a different mix of breakers be provided with TS?

On the 10 circuit panel, can the breakers be changed to 6 single 15A, one double 15A, one double 20A
State: ON - Ontario
Age: 45-54
This product will backup: Other
asked 2 years, 10 months ago
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VV
Toronto
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answer 1
Please consult the local authority since the package is UL listed with the existing breakers. As long as the associated wiring for new breakers is upgraded if necessary, functionally there would not be an issue.
State: WI - Wisconsin
answered 2 years, 10 months ago
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by
Generac
Waukesha
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Question

What are the main differences between the CorePower 7kw and the Guardian 8kw, besides the 1kw of power?

State: VA - Virginia
Age: 35-44
This product will backup: Entire Home
asked 2 years, 10 months ago
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JAGPowderhound
Richmond
on 8kW-6245
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answer 1
There are several differences between CorePower 7kW and the Guardian Series 8kW models:

1. Enclosure: The 7kW is made of a composite material, and the 8kW is made of steel.

2. Transfer Switch: The 7kW includes a 50 Amp, 8 circuit transfer switch (wiring sold separately), and the 8kW includes a pre-wired 100 Amp, 10 circuit transfer switch.

3. Warranty: The 7kW has a 2 Year Limited, and the 8kW has a 3 Year Limited.

4. Power Quality: Only the 8kW features True Power Technology.

5. Size: The 7kW is more compact at 24.4"L x 30.2"W x 33"H compared to the 8kW at 48"L x 25"W x 29"H
State: WI - Wisconsin
answered 2 years, 10 months ago
Customer avatar
by
Generac
Waukesha
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