Generac Next Gen 14kW Air-Cooled Home Standby Generator — Model 7258
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At a glance
- Standby Power
- 14 kW LP / 14 kW NG
- Voltage/Phase
- 120/240V, single-phase, 60 Hz
- Fuel
- Dual-fuel: Natural Gas or Liquid Propane (field-selectable, EFIC electronic fuel control)
- Engine
- Generac G-Force 800 Series, 816cc, OHV with hydraulic lifters
- Cooling
- Air-cooled
- Sound Level
- 65 dBA at 23 ft (normal operation); 55 dBA in Quiet-Test exercise mode
- Connectivity
- Built-in cellular Mobile Link (Wi-Fi and Bluetooth included)
- Controller
- Power Zone 200 with electronic oil sensing and gas pressure monitoring
- Dimensions
- 46.4" L x 26.3" W x 30.7" H
- Weight
- 391 lbs
- Warranty
- 5-year limited warranty
Why this generator
- Full 14 kW output on both natural gas and propane - no power derating when running on NG
- Next Gen G-Force 800 engine with Electronic Fuel and Ignition Control (EFIC) for higher output, better fuel economy, and lower emissions
- Utility-grade power with less than 5% THD - safe for HVAC, electronics, and smart-home devices; load acceptance strong enough to start a 5-ton A/C
- Built-in cellular Mobile Link monitoring standard (plus Wi-Fi and Bluetooth) - check status and get alerts from anywhere
- Quiet 55 dBA self-test mode and all-aluminum enclosure rated for 150 MPH winds; approved for installation as close as 18 inches from the home
- Backed by Generac's 5-year limited warranty
Everything you need to know
Generac Next Gen 14kW air-cooled home standby generator (model 7258). Generac's newest generation with the purpose-built G-Force engine, dual fuel (natural gas or LP), 50-state compliant.
Genuine Generac unit from a factory-authorized dealer. Free shipping to the lower 48. Professional installation available in NC & SC.
Frequently asked questions
What fuel does the this generator run on?+
The unit runs on natural gas or LP (propane), selectable at install.
Does the price include installation?+
No — the online price covers the unit shipped free to the lower 48. Professional installation is available in NC & SC on a quote basis; outside that area we'll help you find a qualified local installer.
How fast does it ship?+
Free curbside / liftgate shipping to the contiguous 48 states. Most orders leave the warehouse in 3–5 business days.
What warranty is included?+
5-year limited factory warranty, registered and supported directly through Generac.
Is financing available?+
Yes — 0% APR financing is available on qualifying orders. Ask us for details before checkout.
Free curbside shipping
Liftgate delivery to the lower 48. Most orders leave the warehouse in 3–5 business days.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Cummins warranty
Full 5-year / 2,000-hour limited warranty — registered and supported through Cummins directly.