Model#: GRCN7040

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Generac 7040 20/18kW Air-Cooled 200SE Synergy Standby Generator with Mobile Link (Non-CuL)

  • Generac 7040 20/18kW Air-Cooled 200SE Synergy Standby Generator with Mobile Link (Non-CuL)
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(continental U.S.)

Freight Orders

Freight deliveries require a delivery time be scheduled and someone must be present at the time of delivery to inspect and sign for the merchandise. A representative from the freight carrier will call the phone number entered at checkout to schedule the delivery.

Liftgate Service

For freight deliveries, you have the option of adding a liftgate to your delivery. A liftgate is the device that lowers a product from the truck to ground level.

CPO recommends adding liftgate service for freight deliveries exceeding 100 lbs if you do not have a loading dock or fork lift at the delivery address. Additional charges may apply. The liftgate option will be presented during the checkout process.

Please note that liftgate service only ensures the product is removed from the truck. We recommend you have the additional help of two to four people to move the product to its desired location because drivers are not required to assist.

Requesting liftgate service after ordering may result in additional charges and delays.

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Product Overview

Additional Information


A premium backup power solution that can protect your entire home. Unlike competitive units that run at a constant 3600 RPM, the Generac Synergy features patented G-Flex Technology that allows it to run at slower speeds when household electrical demand is light. The result is a home standby generator that is uncommonly quiet and exceptionally fuel efficient. Even better, the Generac Synergy can deliver cleaner power than competitive units - ideal for today's sophisticated modern electronics and sensitive appliances.
  • A premium backup power solution that can protect your entire home Unlike competitive units that run at a constant 3600 RPM, the Generac Synergy features patented G-Flex Technology that allows it to run at slower speeds when household electrical demand is light The result is a home standby generator that is uncommonly quiet and exceptionally fuel efficient Even better, the Generac Synergy can deliver cleaner power than competitive units - ideal for today's sophisticated modern electronics and sensitive appliances
  • Up to whole house protection with the 200-amp, NEMA 3R (aluminum outdoor enclosure) smart switch
  • Mobile Link Remote Monitoring allows you to monitor the status of your generator from anywhere in the world using a smartphone, tablet, or PC Easily access information, such as the current operating status and the generator's maintenance schedule Connect your account to your authorized service dealer for fast, friendly and convenient assistance
  • G-Flex Technology- Unlike competitive units that run at a constant speed, patented G-Flex technology allows the Generac Synergy to run at lower speeds when household electrical demand is light That means significantly quieter operation at normal capacity, less fuel consumption when you need less electricity, and cleaner power than competitive air-cooled home standby generators
  • 5 Year Limited Warranty for automatic standby generators
  • 20/18kW Air-Cooled 200SE Synergy Standby Generator with Mobile Link (Non-CuL) - 7040
Compliance and Restrictions
warning: --


Decibel Rating: 63 dB
Displacement: 999cc
Enclosure Type: Aluminum
Engine Type: OHVI Engine



5.0 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Impressive Product
I must say we are very impressed with how our new Generac System performs. From ordering to install and now performance. One of the BEST purchases I have ever made in my life!!
October 27, 2017
Originally posted at
This generator has great features
The 20 KW synergy generator is a great addition to my home. Installation was a breeze.
October 7, 2017
Originally posted at
well built, looks good, hope we don't need it
The unit is well made and only runs as fast as is needed to provide the current being used , looks good, as mine runs on propane I don't have to worry about keeping the fuel fresh.
August 5, 2017
Originally posted at
Just the features I wanted
I was very happy to find out that Generac had a newer model when I was searching for a generator. I purchased the variable load model, that runs at the speed necessary for the load I have.
June 22, 2017
Originally posted at
Very good.
I am very pleased with my 20 K, variable speed unit. However as an engineer I am a little concerned about the allowable space at the exhaust end of the unit. My generator has a sound barrier around it with a 36 inch space at the exhaust end which seems to be inadequate, since it puts out considerable heat and exhaust volume. A minimum of 4 feet clearance would seem to be more appropriate.
June 17, 2017
Originally posted at
Initial review
This unit appears to be very well built and quiet when running. Power is clean and consistent.

On the first full load run it encountered a 1061 VSCF Field loss error, and shut down. The fuse was pulled to clear the codes and on the second run it powered everything without an issue.

We are using the SMM module at the 4 ton AC unit and it works great, best part is no control wires!
June 2, 2017
Originally posted at
Synergy design is efficient and quiet.
The reliability of the Generac Guardian line is well known. I was attracted to the efficiency and reduced sound levels afforded by the Synergy generator at low to moderate loads when engine speed is reduced. In purchasing this new variable speed technology, I'm relying Generac's reputation.
June 2, 2017
Originally posted at
Power went out 2 days after install. JIT!
our community lost power for 7 hours 2 days after my Generac Synergy 7040 system was installed. My generator came online and ran the entire time, supplying power to our house while our neighbors were without. The benefits of this model include: - it can power our entire home during normal usage - it automatically powers on/off when grid goes away/comes back - the transfer switch (provided) has 2 smart A/C circuits so additional smart circuits don't have to be purchased for AC units (unless you have more than 2) - it runs off propane - it is variable speed increasing or decreasing RPM to match load (we could tell this worked because the RPM went up when we used the oven) - it is air cooled - it will soon have a Wifi module (not available yet) for remote monitoring via the web.

We are very pleased with this generator.
June 1, 2017
Originally posted at
Awesome System
We wanted a quieter unit due to proximity of neighbors house. This system fits the bill as it cycles down to 1900 RPM when there is minimal load. This saves on fuel as well as minimizing noise. Very impressive.
January 28, 2017
Originally posted at
It's a great product for the price
I am sure this product has been test and will be very dependable for years . My only fear is I have heard some not so favorable service reports if you were to need warranty repairs the reason being is because they , being local dealer doesn't like to work on it when they are not the installer this could be a big deterrent from you selling your product to general public I hope in the future this problem can be worked between manufacture and dealers . The attitude of a dealer greatly affects the products marketability
January 26, 2017
Originally posted at

Questions & Answers

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For a period of two years from the date of the original sale Generac Power Systems, Inc (Generac) warrants that its standby generator will be free from defects in material and workmanship for the items and period set forth below. Generac Power Systems, Inc, will, at its option, repair or replace and part(s) with, upon examination, inspections and testing by Generac Power Systems, Inc. or an Authorized/Certified Generac Dealer is found to be defective. Any equipment that the purchaser/owner claims to be defective must be examined by the nearest Authorized/Certified Generac Dealer. This warranty applied only to Generac emergency automatic standby generators used in "Standby" applications as Generac Power Systems, Inc has defined Standby. Scheduled Maintenance, as outlined by the generator owner's manual, is highly recommended. This Scheduled Maintenance should be performed by an Authorized/Certified Generac Dealer. This will verify service as been performed on this unit throughout the warranty period.

**This warranty applied to units installed in the US and Canada. Contact the Warranty Department for specific information on installations in International Markets.**




  • Warranty begins upon the successful registration of the unit.
  • Proof of Purchase and Maintenance must be available.
  • Warranty only applied to permanently wired and mounted units.
  • Warranty is transferable between ownership of original installation site.
  • any warranty repairs and/or concerns, must be performed and/or addressed by an Authorized/Certified Generac Power Systems Service Dealer, or branch thereof. Repairs or diagnostics performed by individuals other than Generac authorized dealer not authorized in writing by Generac Power Systems will not be covered.
  • A Generac Power Systems, Inc Transfer Switch is to be used in conjunction with the generator set. If a Non-Generac Transfer Switch is substituted for use and directly causes damage to the generator set, no warranty coverage shall apply.
  • All warranty expense allowances are subject to the conditioned defined in Generac's General Service Policy Manual.
  • Covered warranty labor rates are based on normal operating hours. Overtime, holiday, or emergency labor costs for repairs outside of normal business hours will be the responsibility of the customer.


  • Any unit built/manufactured prior to July 1, 2010.
  • Generac generators that utilize non-Generac replacement parts.
  • Cost of normal maintenance (i.e. tune-ups, associated part(s), adjustments, loose/leaking clamps, installation, and start-up.
  • Units sold, rated or used for "Prime Power", "Trailer Mounted", or "Rental Unit" applications as Generac Power Systems has defined Prime Power, Trailer Mounted or Rental Unit. Contact a Generac Power Systems Distributor for Prime Power, Trailer Mounted, or Rental Unit definitions.
  • Units used for prime power in place of existing utility power (where utility power is present) or in place of utility power where utility power service does not normally exist.
  • Damage to generator system (including transfer switch) caused by improper installation or costs necessary to correct installation.
  • Fuel connections other than conventional utility company supplied natural gas systems or conventional LP vapor withdrawal systems.
  • Any failure caused by contaminated fuels, oils, coolants/antifreeze or lack of proper fuels, oils, or coolants/antifreeze.
  • Failures due, but not limited, to normal ware and tear, accident, misuse, abuse, negligence, misapplication, or improper installation.
  • As with all mechanical devices, the Generac engines need periodic part(s) service and replacement to perform as designed. This warranty will not cover repair when normal use has exhausted the life of a part(s) or engine.
  • Products hat are modified or altered in a manner not authorized by Generac in writing.
  • Damage related to rodent and/or insect infestation.
  • Failures caused by any external cause or act of God, such as collision, theft, vandalism, riot, or wars, nuclear holocaust, fire, freezing, lighting, earthquake, windstorm, hail, volcanic eruption, water or flood, tornado or hurricane.
  • Any incidental, consequential or direct damaged caused by defects in materials or workmanship, or any delay in repair or replacement of the defective part(s).
  • Overnight freight or special shipping costs for replacement part(s).
  • Telephone, cell phone, facsimile, internet access or other communication expenses.
  • Living or travel expenses of person(s) performing service, except as specifically included within the terms of a specific unit of warranty period.
  • Rental equipment used while warranty repairs are being performed and/or overnight freight costs for replacement part(s).
  • Expenses related to "customer instruction" or troubleshooting where no manufacturing defect is found.
  • Costs incurred for equipment used for removal and/or reinstallation of generator (i.e cranes, hoists, lifts, etc).
  • Planes, ferried, railroad, buses, helicopters, snowmobiles, snow-cats, off-road vehicles or any other mode of transportation deemed abnormal.
  • Starting batteries, fuses, light bulbs, and engine fluids.

THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED. SPECIFICALLY, GENERAC MAKES NO OTHER WARRANTIES AS TO THE MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Any implied warranties which are allowed by law, shall be limited in duration to the terms of the express warranty provided herein. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. GENERACS ONLY LIABILITY SHALL BE THE REPAIR OR REPLACEMENT OF PART(S) AS STATED ABOVE. IN NO EVENT SHALL GENERAC BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF SUCH DAMAGES ARE A DIRECT RESULT OF GENERAC'S NEGLIGENCE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation does not apply to you. This warranty gives you specific legal rights. You also have other rights from state to state.