GE 20,000-Watt Generator System with Symphony II Whole House 200-Amp Transfer Switch with free Maintenance Kit-040503 at The Home Depot
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Model # 040503

Internet # 204331273

20,000-Watt Generator System with Symphony II Whole House 200-Amp Transfer Switch with free Maintenance Kit

GE 20,000-Watt Generator System with Symphony II Whole House 200-Amp Transfer Switch with free Maintenance Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.

$4,599.00 / each
Item cannot be shipped to the following state(s): AK,CA,GU,HI,PR,VI


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Model # 040503

Internet # 204331273

Our 20kW generator system by GE features our ground-breaking Symphony II power management system, advanced safeguarding features that meet rigorous industry fire protection standards, and a unique air-flow design that makes this our quietest air-cooled standby generator yet. It also features the longest, most comprehensive warranty in the industry. For a limited time, this generator even includes a free maintenance kit, making it an even smarter choice.

  • Patented Symphony II power controls provide a managed power solution that gives you access to every powered item in your home, just not at the same time, by using power management modules, appliances are prioritized and turn on/off based on need and the electrical load placed on your home generator
  • Longest, most comprehensive limited generator warranty in the industry, no one else offers a 5-year limited parts and labor warranty, so you can be assured of our commitment to quality and to your pocketbook
  • Thoroughly tested against rigorous national fire protection agency standards, this is the only 20kw home standby generator with an all-steel enclosure and all-steel base, so it can withstand temperatures more than double that of aluminum and far beyond that of plastic
  • With an external, automatic gas shut-off valve, low pressure regulator and an internal thermal protection system, we've raised the bar on protecting the home and family during power loss
  • Proven to deliver non-stop reliability, our 20kW standby generator is powered by a premium-grade Vanguard engine that is developed for tough commercial applications
  • Includes a wireless monitor for inside your home, so you know your standby generator is working without having to go outside
  • Featuring unique air-flow technology, our 20 kW home standby generator is our quietest generator yet, and because it is 50% quieter than many portable generators, this is the best choice to keep your neighbors happy
  • Our enclosures are made from the same rust-resistant, durable galvanneal steel resulting in years of protection against chipping and abrasions
  • Our electronic governor provides stable, consistent power for sensitive electronics and today's most advanced appliances
  • Standby generator even comes with a free Briggs and Stratton maintenance kit for GE generator systems designed, manufactured and tested specifically for your generator’s needs
  • Want to learn about Standby Generators and find the right one for you? Click here for our generator selector tool "
  • Home Depot Protection Plan:

    Home Depot Protection Plan


Assembled Depth (in.)  29 in  Assembled Height (in.)  31 in 
Assembled Width (in.)  47 in  CA (CARB) Compliant  Not CARB Compliant 
Certifications and Listings  1-UL Listed,CSA Listed  Color Family  Gray 
Commercial / Residential  Residential  Continuous Wattage  20000 
ENERGY STAR Certified  No  Engine Displacement (cc)  993 
Engine Make  OEM Branded  Engine manufacturer  Briggs & Stratton 
Height (in.)  31  Hour Meter  Yes 
Low oil shutdown  Yes  Manufacturer Warranty  5-Year Limited Parts and Labor Warranty 
Operational volume (dB)  70.8  Product Height (in.)  31 
Product Length (in.)  47  Product Weight (lb.)  500 lb 
Product Width (in.)  29  Remote Monitoring  Included 
Response time (sec.)  26  Returnable  Non-Returnable 
Width  47.00 


Rated 4.6 out of 5 by 47 reviewers.
Rated 5 out of 5 by This is my Dream Generator! Right now we only have one of those old gasoline, Really LOUD generators and although I've been grateful to have it after Tornados and Ice Storms, I would love to get one of these Beauties!I read about the specs after entering my house size, etc and then I have been reading the reviews of the people who have one of these. It sounds Amazing! I worry about some type of diaster happening, maybe even the power grid failing and in addition to not being able to buy more fuel for ours in that scenario, the Extreme Volume of our generator lets individuals with bad intentions think that if you're running a generator, then you must have something to protect! Namely Food! I have a little stored back but not enough to get through 6 months much less supply hoards of people who didn't even store back a few packages of Ramen noodles. I am excited about you offering financing and hope that soon I may be posting a New review about how well our GE Generator performed this coming winter! Thank you! September 6, 2014
Rated 5 out of 5 by "Life goes On ! I purchased this generator over a year ago in response to the ever changing weather patterns we seem to be victim of. I wanted dependability for my wife in the event of my absence (being a fireman) and as I tell my wife "life goes on for you" during any power interruption. Cooking, washing, drying, AC/ Heat pump, you are all good to go thanks to my 20K GE Generator. June 23, 2014
Rated 5 out of 5 by Very happy with my GE 20 KW Generator It is so nice when products actually do what they advertise they will. I have a 12 KW gasoline powered generator that has worked ok for the past four years. It powered my entire winter loads fine but not the AC loads in the summer. I started thinking about a whole house generator some months ago and settled on the GE and one other brand. I went with the GE because if it’s superior warranty and I could get it in a few weeks in lieu of a few months. The remainders of the comparison points were the same for both units. I also ordered some load sharing modules for my heavier loads like ACs and hot water heaters. I received the unit in just a few weeks. I had elected to pour a small concrete pad to put the generator on while waiting for it. We used the pipe as suggested to lift it and four men put it up on the pad. I had a plumbing firm run another line from my existing gas meter to the generator. The gas company also had to install a larger regulator to supply the extra load. I had an electrician install the transfer switch. The cost of the electrical and plumbing work/materials almost equaled the cost of the generator - so keep that in mind if you are considering one of these units. The plumber finished first. We set the regulator at the generator and then turned on all heat in the home and started the generator. With no load the gas pressure stayed exactly in the middle of what the GC installation manual specified. The generator runs very slightly rough when under no-load conditions but GE tech support said this was normal and would go away after a break-in period. My home is 3500 square feet and has eight tons of AC (three units). After the electrician completed his work we ran load tests. I have not installed any of the load shedding modules yet so I adjusted the loads manually. I had most loads in the home on except the ACs. I performed the startup procedure per the manual and the generator came up perfectly. I turned on one of the 3-ton ACs and the generator NEVER EVEN missed a lick. The gas pressure was also constant at 6" H2O. I was pulling about 40 amps and 27 amps on each phase respectively. I turned on the second 3-ton AC and it was barely noticeable to the generator. The generator runs very smoothly with even the slightest load on it. Now my current was in excess of 40 amps and 38 amps on each phase respectively. I let it run like this for an hour and it just purred along. The gas pressure still remained at 6" H2O. The voltage and frequency were exactly on. I have had the unit for about two months now and it has been on-line for over a month. It is located right outside my office in my home and is very quiet when it does its weekly test run - quieter than my riding lawnmower. I am going to install the load modules soon. I took many pictures and recorded gas pressure, frequency, voltage, and current through this whole process. I had only one occasion to call the tech support people and they were very nice and knowledgeable about the product. I highly recommend this product and I am happy that the Home Depot carried it. February 9, 2013
Rated 4 out of 5 by Solid solution for large homes, and no worries I wanted a whole-house unit that could run everything and do so reliably. This unit’s 83.3 amps of power is more than sufficient for my multiple refrigerators, two HVAC units, 3 dishwashers, sump pump, tons of electronics, electric car charging, and so on. The transfer switch automatically and safely switches the unit on and off quickly and has worked very well for the times we have needed the unit. Only complaints: had to increase the amount of natural gas coming to the unit by increasing the meter capacity and the line size to the generator. Also, the remote control “loses” its connectivity to the generator every once in awhile for no apparent reason even though it is less than 10 feet and one wall away from the transmitter. May 12, 2014
Rated 5 out of 5 by A very useful addition to our property We have a handicap situation in our home and need a back up electrical source to operate the assistance equipment our daughter must live with. We did run into engine problems early on but were addressed quickly and none since. The unit was installed in the Fall of 2010 and currently has 250 plus hours of service (New Hampshire location). The switch over to the generator and back to the electrical grid is rapid and smooth. I have constructed a roof over the unit to keep the snow buildup away from the air intakes, saved shoveling. May 14, 2014
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