Cummins RS17A
Air-cooled · Natural Gas / LP Vapor
Collin County · Texas
Generator installation in Prosper, TX
A typical 20kW Cummins whole-house generator installed in Prosper is estimated at $13,500–$17,000. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate. The RS20A unit alone is $5,925.25. We pull the Prosper permit and meet the inspector. Electric delivery is Oncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address; natural gas is CoServ Gas.
Authorized Cummins dealer · TECL #40628 · our own electricians, no subcontracted electrical work
Prosper at a glance
| County | Collin County |
|---|---|
| Electric delivery | Oncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address |
| Natural gas | CoServ Gas |
| Typical 20kW installed | $13,500 – $17,000 Estimate only; installations vary, and a site visit determines your price. |
| Site survey | Free, about 45 minutes |
Permits and inspection in Prosper
A permit is required before installation. Prosper builds to the 2021 International codes and, since November 2023, the 2023 National Electrical Code.
Neighboring Richardson is still on the 2020 NEC, and the 2020 and 2023 editions differ on parts of the transfer switch and disconnecting means rules, so a detail accepted in one city is not automatically accepted in Prosper.
State law limits what Prosper may require on a home system of 50kW or less, and a qualified third party may do the review and inspection instead: Texas Local Government Code § 229.102 and Texas Local Government Code § 247.0025. Your HOA cannot ban the generator either (Property Code § 202.019).
Served by CoServ? CoServ’s standby generator requirements: the application, the open-transition transfer switch and the no-export rule.
Utilities that affect your install
Electric delivery in Prosper is Oncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address. The boundary runs through neighborhoods, so two houses on one street can have different providers, and each approves a service-entrance tie-in its own way. Your bill shows which you have.
Natural gas is CoServ Gas. If the meter cannot carry the generator on top of the furnace, water heater and other appliances, the utility has to upsize it, which is a separate request with its own timeline. How gas line sizing works.
Already have solar? It has to connect on the utility side of the transfer switch so the generator never feeds the inverters, and the disconnect and meter rules come from Oncor Electric Delivery or CoServ Electric or Grayson-Collin Electric Cooperative, whichever serves your address. Why, and how the main DFW utilities handle it.
Who does the work
UTS ElectricPros is the authorized Cummins dealer. Installation is done by our own electricians working as Clements Electric, our dba, from 2100 S Great Southwest Pkwy, Suite 505, Grand Prairie, under TECL #40628. The installation process runs survey, written price, permit, install, inspection and commissioning under load.
Our installation crews work under the Clements Electric name, which also covers repairs, maintenance and other electrical work in Prosper. Clements Electric standby generator installation and service in Prosper.
Popular in Prosper
Cummins RS20AC
Air-cooled · Natural Gas / LP Vapor
ATS included
Cummins RS13A
Air-cooled · Natural Gas / LP Vapor
Other Cummins equipment for Prosper
Installed in Prosper: Home standby generators · Light commercial diesel generators · Agricultural standby generators · Automatic transfer switches
Shipped to Prosper, no installation needed: Portable generators · RV generators · Mobile trailer-mounted diesel generators
Generator questions from Prosper homeowners
How much does a whole house generator cost in Prosper?
A typical 20kW Cummins system installed in Prosper is estimated at $13,500 to $17,000, including the pad, transfer switch, permit and commissioning, with the gas line included as its own line item. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate. The RS20A unit itself is $5,925.25. Your figure depends on the distance from the generator to the gas meter and the electrical panel and on whether the gas meter needs upsizing, so it is fixed in writing after a free survey.
Do I need a permit for a generator in Prosper?
Yes. A permit is required before installation. Prosper builds to the 2021 International codes and, since November 2023, the 2023 National Electrical Code. We pull the permit and meet the inspector, and it is inside the installation quote.
Can Prosper regulate my home generator install?
Only within limits. Texas Local Government Code § 229.102 bars a city from regulating the installation or inspection of a residential backup system of 50kW or less where the city does not own the electric utility. Since 2025, Texas Local Government Code § 247.0025 also lets a qualified third party do the plan review and inspection, and the city must then issue the permit by the third business day after notice.
Who provides gas and electric service in Prosper?
Electric delivery is Oncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address. Natural gas is CoServ Gas. The electric utility sets how the transfer switch ties in at the meter; the gas utility decides whether your meter can carry the generator's extra demand. Service territory does not follow city limits, so we confirm both from your bill before quoting.
Who installs the generator in Prosper?
Our own licensed electricians, working as Clements Electric, the dba of UTS ElectricPros, LLC, from 2100 S Great Southwest Pkwy, Suite 505, Grand Prairie, under TECL #40628. The gas line is run by a licensed plumber we hire and warrant, or by your own plumber if you prefer. UTS ElectricPros is the authorized Cummins dealer, so the same company sells, installs and handles the warranty.