Generac Guardian 20kW Aluminum Standby Generator System (200A Service Disconnect + AC Shedding) - 5875

MPN: 5875
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Description
Generac Guardian 20kW Aluminum Standby Generator System (200A Service Disconnect + AC Shedding) - 5875 - Smart Circuit Standby Generator System Restores power to your entire electrical panel automatically Digital Load Management (DLM) protects against overload Nexus Smart Switch (RTSD200A3 - Included) DLM technology allows for the smart control of 2 air conditioners
Summary
Product Title Generac Guardian 20kW Aluminum Standby Generator System (200A Service Disconnect + AC Shedding) - 5875
Manufacturer Generac
Lowest Price $9,555.50 from Build.com
Power Score 4.9 | 40 Reviews
Expert Reviews
Best Whole House Generator
5 Star Review  bestcovery.com - Aug 6, 2013

Bestcovery experts have rated the Generac Guardian Series 5875, 20kw Air Cooled Standby Generator as the Best Whole House Generator. Bestcovery's experts recommend the best products and services for a particular need based on extensive research and evaluations. Click below to see Bestcovery's full review of this product.

Read the full review »

User Reviews
Outstanding unit. Power to spare
5 Star Review   By Bobby on Norwall PowerSystems - Aug 31, 2013   

Bought unit in May 2013. Then completed install and the power went out 3 days later. The unit picked up load and never skipped a beat.

50% of readers found this review helpful.

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one year old and not working
1 Star Review   By verbena11 on Acme Tools - Jul 9, 2013   

We looked at a number of generators and ultimately decided on this one because there was supposed to be area support. It's one year old and now not working, has been down for three weeks, gives "low voltage" error warning. I see from the internet that this is a common problem, wish I would have known before purchasing. We went around and around with the technical support, first were told that they wouldn't even service the unit based on where we live (Bismarck, ND area) but my husband persisted, spent a day on the phone, and finally got someone to come out after repeated phone calls over a couple of weeks. Part ordered, hopefully someday it will arrive and be installed! Power has been out twice so far in this time period. ~Annoyed~

100% of readers found this review helpful.

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Power to spare
5 Star Review   By Patrick on Norwall PowerSystems - Mar 16, 2013   

Just received my 20kw generac in less than a week after ordering. Very well packaged and the curb service worked well. Opening the generator door was like looking under the hood of a new car. My next step is to finish the installation and then put it to the test for the next power outage. Should have plenty of power to spare.

100% of readers found this review helpful.

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I feel so much better no more fears of bad weather
5 Star Review   By vincent c on Norwall PowerSystems - Feb 1, 2013   

I was with no power for a week during hurricane sandy and it was the worst experience of my life, This will be the best investment I have ever made in my life. Thank you for being there norwall when I needed you most.

33% of readers found this review helpful.

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Never without Power Again!
5 Star Review   By Aaron on Norwall PowerSystems - Jan 30, 2013   

We sold our home old house in 2011 and left our 17kw at our old house. Of course this past year has been brutal for storms and power outages! You never miss what you had until need it. I now know what my old neighbors felt when they had NO power for over a week and I didn't miss a beat with my old Generac generator...Never again....Piece of mind once again...don't hesitate...

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Peace of mind that you will not be left in the dark!
5 Star Review   By Jennifer H on Norwall PowerSystems - Jan 11, 2013   

My husband and I purchased this packaged unit and we love it! We had a 3 day power outage recently and it started up and worked exactly the way it was supposed to. We have four children and to lose power (especially in the winter) is unimaginable! Now we have peace of mind that we will not have to leave our home during a bad storm. Love it!!

0% of readers found this review helpful.

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My 20kw generac unit is my first choice in power!
5 Star Review   By phillip r on Norwall PowerSystems - Jan 11, 2013   

My secound choice is my 15 kw generac portable generator i bought in 2005.This 15 kw system was purchase for the katrina hurricane.I wanted a total automatic power system after i retired, so i purchase the 20 kw generac generator from norwall power systems.I know about the quality from experience!

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Power when you need it!
5 Star Review   By Ted T on Norwall PowerSystems - Jan 2, 2013   

I purchased the Generac GUARDIAN Standby Generator – 20KW Model# 5875 in 2010 following our last power outage, courtesy of Hurricane Irene. This year we were hit by tropical storm Sandy and once again we lost power, for about 15 seconds, that’s when the generator kicked in, automatically. We had enough electricity to share with our neighbors. If it wasn’t for Generac, we would have been without power for 4 days. One of my best purchases ever.

100% of readers found this review helpful.

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I love this product
5 Star Review   By anonymous on Norwall PowerSystems - Dec 26, 2012   

We installed this on Saturday and our electric went off on Thursday and everything worked perfectly. It seemed strange to look out at our neighbors and everything else is dark,but nice

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PEACE OF MIND
5 Star Review   By TOM M on Norwall PowerSystems - Dec 20, 2012   

BOUGHT A 20K ABOUT 2 MONTHS AGO. INSTALLATION WAS DONE BY PROS & THEY SAID IT WAS NOT COMPLICATED. SO FAR THE GENERAC DOES EVERYTHING AS ADVERTISED. LOOKS GREAT & GIVES OUR FAMILY PEACE OF MIND IN CASE THE POWER GOES OUT, WE ARE OK!!

0% of readers found this review helpful.

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Today's Average: $9,555.50
Today's Lowest: $9555.50
Compare Prices
Product Details
Description
Generac Guardian 20kW Aluminum Standby Generator System (200A Service Disconnect + AC Shedding) - 5875 - Smart Circuit Standby Generator System Restores power to your entire electrical panel automatically Digital Load Management (DLM) protects against overload Nexus Smart Switch (RTSD200A3 - Included) DLM technology allows for the smart control of 2 air conditioners
Summary
Product Title Generac Guardian 20kW Aluminum Standby Generator System (200A Service Disconnect + AC Shedding) - 5875
Manufacturer Generac
Lowest Price $9,555.50 from Build.com
Power Score 4.9 | 40 Reviews
Additional Specifications
Color: White
Parent Retsku: B003IT76F2
Today's Average: $9,555.50
Today's Lowest: $9555.50
Compare Prices
Expert Reviews
Best Whole House Generator
5 Star Review  bestcovery.com - Aug 6, 2013

Bestcovery experts have rated the Generac Guardian Series 5875, 20kw Air Cooled Standby Generator as the Best Whole House Generator. Bestcovery's experts recommend the best products and services for a particular need based on extensive research and evaluations. Click below to see Bestcovery's full review of this product.

Read the full review »

User Reviews
Outstanding unit. Power to spare
5 Star Review   By Bobby on Norwall PowerSystems - Aug 31, 2013   

Bought unit in May 2013. Then completed install and the power went out 3 days later. The unit picked up load and never skipped a beat.

50% of readers found this review helpful.

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one year old and not working
1 Star Review   By verbena11 on Acme Tools - Jul 9, 2013   

We looked at a number of generators and ultimately decided on this one because there was supposed to be area support. It's one year old and now not working, has been down for three weeks, gives "low voltage" error warning. I see from the internet that this is a common problem, wish I would have known before purchasing. We went around and around with the technical support, first were told that they wouldn't even service the unit based on where we live (Bismarck, ND area) but my husband persisted, spent a day on the phone, and finally got someone to come out after repeated phone calls over a couple of weeks. Part ordered, hopefully someday it will arrive and be installed! Power has been out twice so far in this time period. ~Annoyed~

100% of readers found this review helpful.

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Power to spare
5 Star Review   By Patrick on Norwall PowerSystems - Mar 16, 2013   

Just received my 20kw generac in less than a week after ordering. Very well packaged and the curb service worked well. Opening the generator door was like looking under the hood of a new car. My next step is to finish the installation and then put it to the test for the next power outage. Should have plenty of power to spare.

100% of readers found this review helpful.

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I feel so much better no more fears of bad weather
5 Star Review   By vincent c on Norwall PowerSystems - Feb 1, 2013   

I was with no power for a week during hurricane sandy and it was the worst experience of my life, This will be the best investment I have ever made in my life. Thank you for being there norwall when I needed you most.

33% of readers found this review helpful.

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Never without Power Again!
5 Star Review   By Aaron on Norwall PowerSystems - Jan 30, 2013   

We sold our home old house in 2011 and left our 17kw at our old house. Of course this past year has been brutal for storms and power outages! You never miss what you had until need it. I now know what my old neighbors felt when they had NO power for over a week and I didn't miss a beat with my old Generac generator...Never again....Piece of mind once again...don't hesitate...

Was this review helpful to you?  Yes or No ( Report this as inappropriate )

Peace of mind that you will not be left in the dark!
5 Star Review   By Jennifer H on Norwall PowerSystems - Jan 11, 2013   

My husband and I purchased this packaged unit and we love it! We had a 3 day power outage recently and it started up and worked exactly the way it was supposed to. We have four children and to lose power (especially in the winter) is unimaginable! Now we have peace of mind that we will not have to leave our home during a bad storm. Love it!!

0% of readers found this review helpful.

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My 20kw generac unit is my first choice in power!
5 Star Review   By phillip r on Norwall PowerSystems - Jan 11, 2013   

My secound choice is my 15 kw generac portable generator i bought in 2005.This 15 kw system was purchase for the katrina hurricane.I wanted a total automatic power system after i retired, so i purchase the 20 kw generac generator from norwall power systems.I know about the quality from experience!

Was this review helpful to you?  Yes or No ( Report this as inappropriate )

Power when you need it!
5 Star Review   By Ted T on Norwall PowerSystems - Jan 2, 2013   

I purchased the Generac GUARDIAN Standby Generator – 20KW Model# 5875 in 2010 following our last power outage, courtesy of Hurricane Irene. This year we were hit by tropical storm Sandy and once again we lost power, for about 15 seconds, that’s when the generator kicked in, automatically. We had enough electricity to share with our neighbors. If it wasn’t for Generac, we would have been without power for 4 days. One of my best purchases ever.

100% of readers found this review helpful.

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I love this product
5 Star Review   By anonymous on Norwall PowerSystems - Dec 26, 2012   

We installed this on Saturday and our electric went off on Thursday and everything worked perfectly. It seemed strange to look out at our neighbors and everything else is dark,but nice

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PEACE OF MIND
5 Star Review   By TOM M on Norwall PowerSystems - Dec 20, 2012   

BOUGHT A 20K ABOUT 2 MONTHS AGO. INSTALLATION WAS DONE BY PROS & THEY SAID IT WAS NOT COMPLICATED. SO FAR THE GENERAC DOES EVERYTHING AS ADVERTISED. LOOKS GREAT & GIVES OUR FAMILY PEACE OF MIND IN CASE THE POWER GOES OUT, WE ARE OK!!

0% of readers found this review helpful.

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So far so good
5 Star Review   By John on Norwall PowerSystems - Dec 20, 2012   

Ordered my 20kw right after Sandy hit. I was fortunate enough to purchase one here at Norwall that was in stock at the time, and therefore, it arrived shortly thereafter. Had to have propane installed and after that was completed, the electricians came along and installed the generator. They demonstrated how it will turn on by shutting off the power to my house. All I can say, is it is a great feeling to see your home come back to life approximately 10 seconds after the power is off. As far as noise, it honestly isn't much at all...probably like a push mower in terms of levels of sound...so nothing that will upset neighbors. At this point, no power outages yet, but I am looking forward to the next one!

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Would not be without a Generac
5 Star Review   By Fred B on Norwall PowerSystems - Dec 17, 2012   

I purchased my first generac unit, a 14 kw 6 years ago. It has been perfect. After Sandy I decided to upgrade to a 20 kw Model 5875. I had my 14 kw unit reinstalled at my business. they both work perfectly. Great service-great price. A very good experience. Several friends have now bought the same unit and feel the same way

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Delivered when I needed it
5 Star Review   By Tom V. in CT on Norwall PowerSystems - Dec 9, 2012   

Sandy took out utility-supplied power to my home for more than 7 days. Thanks to my Generac 20kW generator I had heat, lights, TV, and everything I wanted and needed during the outage. It ran my air conditioning during a 1-day outage over the summer. I am not the only one in my neighborhood who has one, but those who don't sure wished they did. And I've recommended Generac and Norwall to everyone for their great products and customer service.

50% of readers found this review helpful.

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Hope this review helps. I live in Reading PA and used UGI for gas work and Waldman elect for gen install
5 Star Review   By Shawn M on Norwall PowerSystems - Dec 6, 2012   

I was happy with install price as it was cheaper than what I had researched."

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Is that all you got
5 Star Review   By Brian D on Norwall PowerSystems - Nov 20, 2012   

After the two storms here in the Northeast in 2011 we were without power for 2 weeks.I decided i was never going through that displacement again.We purchased a 5875 20 kw from Norwall(they were great,knowledgeable and very professional)I in stalled a 500 gallon propane tank and we were ready to roll,when our power went out 3 weeks ago the generator started about 15 seconds later and ran for 5.5 straight days and amazed me when I calculated my propane fuel usage to 1.2 gallons per hour.I felt bad for the people without power.but still managed to climb into my 6 person hot tub on the deck,by the way,didn't burn 1 drop of oil after running for 135 hours straight.(I use blue purple syn)So back to my headline,my wife saw a commercial for generac with a women outside during a windstorm saying (is that all you got)and said if that were a man it would be you.Thank you Norwall for making the purchase a pleasant experience and thank you Generac for making a quality product that functioned with perfection.Afterall anything that runs at 3600 rpm's for 135 hours is like a car traveling almost 10,000 miles without stopping and had no oil consumption that is just amazing.

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20kw Stanby generator
5 Star Review   By John M. Hill on Norwall PowerSystems - Nov 6, 2012   

This is a great Generator i had a 14 and a 20 kw it delivers great service.

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20K all the way!
5 Star Review   By Mike G on Norwall PowerSystems - Nov 6, 2012   

Generac and Norwall are a great combo. The sale, delivery and install went as smoothly as could be expected. The generator and transfer switch performed flawlessly when Hurricane Sandy turned the lights off for 72 hrs and 16 mins. My family was in darkness for the 30 seconds it took for the systems to do exactly what they were designed to do. 20kw powered my entire 3400 sq. ft. home and met all the needs of my family and those who took refuge with us. I would and daily do recommend Generac and Norwall. If you've read this far waste no more time and just place your order. Finally I and my family thank both Generac and Norwall.

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Great Product
5 Star Review   By Anthony on Norwall PowerSystems - Nov 5, 2012   

After installing the 5875 back in august 2011,It got its first use this past week from hurricane sandy. It Ran for 6 days straight with no breaks and I did not have one problem.With the 20kw you can do anything you would normally do on a daily basis. My wife was baking doing laundry i had every light and electronic device on. The transfer when power is restored is flawless I didnt even notice I got power back until I walked outside and didnt hear the generator running. the only issue I have is generac does not have customer service you have to call a dealer or service company and they dont give any free information. So if your a DIY guy like myself this may be an issue

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In closing
5 Star Review   By Matt P on Norwall PowerSystems - Nov 3, 2012   

you will not find a better combination of product and service anywhere."

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happy camper
4 Star Review   By Tom G. on Norwall PowerSystems - Nov 1, 2012   

Can not be happier after install.Used about 2 times since purchase.Hurricane Sandy came through and was praying for power outage.Got my wish as electric went off for 3 hrs.Didn't miss a beat.Neighbors asking loads of questions about generator but hesitant on spending the money.Oh well their loss.Did install by my self and saved on labor expense.

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Flawless
5 Star Review   By GEM on Norwall PowerSystems - Aug 15, 2012   

I bought this last November and it has been flawless from day 1

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Norwall has been excellent to deal with
4 Star Review   By Joseph triano on Norwall PowerSystems - Jun 18, 2012   

the website is great and the customer service outstanding i buy all my generator product using Norwall."

0% of readers found this review helpful.

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Norwall Customer Service is Awesome
5 Star Review   By Rodger S on Norwall PowerSystems - May 16, 2012   

Had contact both voice and email with Rebecca, Jeana, and Karen during the purchase and shipping process. The personal attention they gave to my order was nothing short of Outstanding. All of my questions were answered in a timely manner, and they followed up with email confirmation. Your wasting time looking elsewhere for generators or maintenace equipment. I would highly recommend Norwall to all of my relatives and friends.

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Happy Customer
5 Star Review   By Doug A on Norwall PowerSystems - Apr 11, 2012   

great product, great price. Came quickly. Delivery company did not want to drive into my neighborhood so electrician met nearby, no problems.

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Go ahead
5 Star Review   By Kenneth S on Norwall PowerSystems - Apr 6, 2012   

"Take the plunge" I am sure your experience will be the same as mine, "OUTSTANDING" !!!!

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Worth every penny!
5 Star Review   By Dave Harmon on Norwall PowerSystems - Feb 26, 2012   

Owned for 2 years. Great peace of mind. I never have to worry about power going off when I am at work at the firehouse and my wife and kids are home. 10 seconds after power failure, whole house is running as usual. Runs everything we need. We have used multiple days at a time on several occasions. Best Price and easy shipping.

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Best Generator Ever
5 Star Review   By Charlie T on Norwall PowerSystems - Jan 19, 2012   

I bought the Generac guardian Standby Generator Model# 5875, 20,000 Watts, 200 Amp Service Entrance, in September of 2010 in preparation for the hurricanes about to come. We were hit by Hurricane Irene and lost power for 5 days. I cannot tell you how blessed we feel for having this generator in time for the storms. It was a life saver. Without our assistance, the generator switched on just as the power went out for our entire street. We had a few family members come stay with us until their power was restored. We are now purchasing one for our parent?s home because at their age they need to feel as safe and comfortable as we did. I would recommend this to everyone. Ted Powers

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Satisfied customer
4 Star Review   By Philippe A on Norwall PowerSystems - Jan 11, 2012   

The generator I wanted was on backorder so. I was disappointed about the wait, but Norwall kept me very informed about the status of the order and got it in as fast as they could. The Generator was delivered in good shape and to this day we are very happy about our purchase.

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Happy and I know it
5 Star Review   By Justin J on Norwall PowerSystems - Dec 14, 2011   

My experience with Norwall PowerSystems was positive from the beginning. Their customer service reps were very knowledgeable and friendly. I received my Generac generator two weeks earlier than expected and the shipping vendor was very accommodating. The generator was in perfect condition when delivered.

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Recommendation is key
5 Star Review   By Joe Clair on Norwall PowerSystems - Dec 11, 2011   

I had done a lot of online research on the product that I ordered and Norwall PowerSystems came highly recommended. However I was very surprised when I ordered a generator on Sunday and it was delivered on Wednesday morning. Very good service! Lucky for us it was delivered right before an ice storm. All of the power was knocked out on our street except for us and the people beside us. We chose this generator in the end because of its fair price, ATS was included and it manages up to whole house backup if we need that in the future.

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First time is a charm
5 Star Review   By Matt LeGrace on Norwall PowerSystems - Dec 10, 2011   

This is my first time buying a generator. This website has been extremely resourceful with information and a search box assisting me in choosing the right generator for our family. Also, these guys are the cheapest on the web!

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owned for 6 years & never had any problems to fix excluding general maintenance
5 Star Review   By david g on Norwall PowerSystems - Dec 5, 2011   

This is the only way to go. Cheapest price no tax, free shipping. Compare & you'll see for yourself.

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Best investment I've ever made
5 Star Review   By Stan S on Norwall PowerSystems - Oct 24, 2011   

I live in community with lots of trees, ergo lots of power outages during strorms. Have owned a Generac portable for about 10 years and it has given flawless service, hence my decision to go with a Generac whole house generator, after my bride of 41 years decided she needed hot water during our frequent outages. Norwall is an outstanding company with great prices and great customer service. I couldn't be happier with my Norwall experience and now recommend then to all of my neighbors also considering moving up to a whole house generator.

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After Irene
5 Star Review   By Dick Healy on Norwall PowerSystems - Sep 26, 2011   

After hurricane Irene came and went we lost power for two days. After this experience my wife and I looked into a whole house emergency system, we settled on Generac 20kw with the integrated control box, Norwall Powersystems was by far the best price. I ordered this unit on a Saturday evening and it was delivered 3 days later by ups in perfect condition. We had the unit installed by the electrician who wired our house when it was being built, 4500 sq. ft. 4 bdrm's 4 bath's freezers , refrig, and a entertainment room the generator was installed gas co. provided the gas and the first test the system worked flawlessly, when my electrician cut the power the generator came online within 7 seconds and powered my whole house, 2 a/c units and everything else w/o hesitation. Let it RAIN!! Onto for the rest of the report, a handyman around the house guy like I am can not hook this up and get the proper desired results it is better left to a pro, Cost approx 1,000.00 but well worth the end result, if you already have ng or propane you have less cost, I had none of the above so cost was 600.00, but in the long run the first time this thing comes on line these issues will be completely forgotten.To end I highly recommend Norwall & Generac I hope this helps someone

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I primarily bought the generator for peace of mind following the remodeling of my basement.
5 Star Review   By Mike Beier on Norwall PowerSystems - Sep 1, 2011   

I’ve had my Generac (20kW with 200 Amp Automatic Transfer Switch) for approximately 2 years now. I run the unit on propane fuel which required me to purchase a propane tank. I put a 250 gal tank behind my barn which I now also use to run a propane furnace for heating the barn in the winter. I primarily bought the generator for peace of mind following the remodeling of my basement. The last thing I wanted was to loose power to my sump pump and have the basement flooring damaged. Since installation, I have lost power several times from a few minutes to several hours. With each power loss the Generac came on and transferred my loads with out error each time. The weekly test run that the generator goes through additionally provides me with the added assurance that when called upon I can be guarantee d will perform flawlessly. I have a geothermal heating/cooling system and the 20kw unit has no trouble carrying the load. This is an excellent generator that I would recommend for anyone looking for a whole house unit.

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This is by far the best on the market
5 Star Review   By Jeffrey L on Norwall PowerSystems - Jul 23, 2011   

I have bought 9 of these units over the past 2 years. I am fixing to buy a 10 unit, and as you can see, this is definitly my choice of Generators. I have done extensive research in the competition and none have even come close to the performance of Generac. During Hurricane Katrina and Gustov, I had to run my generator for 3 weeks after Katrina, and 2 1/2 weeks after Gustav. Both times, I had absolutely no problem at all. All i did during each hurricane was have spare oil and maintenance kits, and did the maintenance as required to keep the unit healthy. I have been dealing with Norwall for a few years now, and no one beats the service and price they offer. Great people and very friendly. I will be dealing with Norwall and Generac for many years to come as orders come in for more Generators in my area. Thanks so much for your support and service Norwall...

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top quality..great service
5 Star Review   By Brad on Norwall PowerSystems - Jun 4, 2011   

I was very impressed with the quality of this generator. We use 3 commercial Generac's at work and I saw how well and simple they were made so I bought one for my home. Norwall has the best price by several hundred dollars. Home Depot and Lowes were about 500 dollars or more. I hooked it up and it started first crank. I use Propane so I had to buy a step down gas regulator to deliver the proper amount of fuel. It cost $50 from my local propane dealer. Install on the regulator was 30 minutes. Install costs for plumber and electrical hookup was about $1500. Your cost may be much lower since my situation was complicated by the locations of my utility electrical connection. I had to take it from one side of my house to the other side through the attic. I used 3/4 inch pipe for the fuel but think a 1/2 inch will work. It runs fairly quiet. I would like to see Generac have a quiet kit for the muffler so it could be more quiet, but as it is, it's not objectable. I highly recommend this generator. I bought it a little over-sized to make sure I could power my whole house.

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20K does the trick
5 Star Review   By Wally on Norwall PowerSystems - May 26, 2011   

Best investment due to power failures and ice storms it could be a week without power. Since the purchase it was only used twice during power failure due to a bad storm. Great peace of mind and best price from Norwall. Only go with a 20 KW smaller may not be enough. Now we are ready for the next bad storm.

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Second purchase of this generator in 3 weeks
5 Star Review   By Jeff from New York on Norwall PowerSystems - Mar 12, 2011   

I bought the first one for myself, then bought one for my mom and dad. Now my uncle wants one. Norwall has the best pricing along with the most informed sales staff. These are not kids toys and you have to know what you are talking about. Sharon was the one that I talked to first, then a Karen. Both had the answeres to all of my questions and if they said they would call me back, they did... This comapny IS the best at what they do.. The Product has worked everytime we needed it. 5 times so far this year....

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