Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
Generac 7258 14kW Air-Cooled Whole Home Standby GeneratorFeatures Financing options offer you solutions that meet your budget. Electronic fuel & ignition control optimizes fuel use for a more cost efficient and lower emission back up power solution.* *On average versus Generac Guardian Series standby generators. Long, best in class service intervals mean you spend less time on maintenance and more time enjoying the comfort that comes with owning a standby generator. Remote diagnostics monitor your
Features
- Financing options offer you solutions that meet your budget.
- Electronic fuel & ignition control optimizes fuel use for a more cost-efficient and lower emission back-up power solution.*
- *On average versus Generac Guardian Series standby generators.
- Long, best-in-class service intervals mean you spend less time on maintenance and more time enjoying the comfort that comes with owning a standby generator.
- Remote diagnostics monitor your generator’s performance and help detect issues before they become a problem, helping you save time & money on maintenance.
- Built-in Cellular Connectivity allows you to monitor performance and control your generator with Mobile Link whether you're home or away.
- Mobile LinkTM keeps you connected and provides real-time updates and maintenance alerts.*
- *Requires Mobile Link TM premium subscription
- Oil level sensors monitor oil level to help ensure generator readiness.
- Improved cold start performance enables generator start-up in cold climates.
- Sloped roof and rear air intake reduce risk of snow and ice intrusion.
- Compatible with ecobee by Generac thermostats and Generac PWRcell battery systems to seamlessly monitor & control your home’s energy.
- Every Generac Standby Generator comes with a 5-year limited warranty, and over 65 years of innovation behind it.
- 24/7/365 Customer Support Team is ready all day, every day, from our headquarters in Wisconsin to answer any questions you might have.
- Generac generators and engines are engineered and assembled in the USA*.
What's in The Box
- 14kW Generac Air Cooled Standby Generator
Warranty
- 5 Year Limited Warranty
- 30 Day Satisfaction Gauranteed
Specifications
| SKU | GNC-7258 | |
| Model | 14 kW | |
| Rated maximum continuous power capacity (LP) | 14 kW* | |
| Rated maximum continuous power capacity (NG) | 14 kW* | |
| Rated voltage | 240 V | |
| Rated maximum continuous load current – 240 Volts (LP / NG) | 58 / 58 | |
| Total Harmonic Distortion | Less than 5% | |
| Main line circuit breaker | 60 amp | |
| Phase | 1 | |
| Number of rotor poles | 2 | |
| Rated AC frequency | 60 Hz | |
| Power factor | 1.0 | |
| Battery requirement (not included) | 12 volts, AGM Powersport Battery Group BTX20L 310CCA minimum | |
| Unit weight (lb / kg) | 391 / 177 | |
| Dimensions (L x W x H) in / cm | 46.4 x 26.3 x 30.7 / 117.9 x 66.8 x 77.9 | |
| Sound output in dB(A) at 23 ft (7 m) with generator operating at normal load | 65 | |
| Sound output in dB(A) at 23 ft (7 m) with generator in Quiet-Test™ low-speed exercise mode | 55 | |
| Exercise duration | Adjustable 5 - 20 min (5 min factory default) | |
| Engine type | GENERAC G-Force 800 Series | |
| Number of cylinders | 2 | |
| Displacement | 817 cc | |
| Cylinder block | Aluminum w/ cast iron sleeve | |
| Valve arrangement | Overhead valve | |
| Lifter type | Hydraulic | |
| Ignition system | Solid-state | |
| Governor system | Electronic | |
| Compression ratio | 9.5:1 | |
| Starter | 12 VDC | |
| Oil capacity including filter | Approx. 2.5 qt / 2.4 L | |
| Operating rpm | 3,600 | |
| Fuel consumption Natural Gas 1/2 Load | 189 ft³/hr (5.35 m³/hr) | |
| Fuel consumption Natural Gas Full Load | 243 ft³/hr (6.89 m³/hr) | |
| Fuel consumption Liquid Propane 1/2 Load | 63 ft³/hr (1.76 gal/hr) [6.66 L/hr] | |
| Fuel consumption Liquid Propane Full Load | 106 ft³/hr (2.92 gal/hr) [11.03 L/hr] | |
| Controls AUTO | Automatic start on utility failure; programmable exerciser | |
| Controls MANUAL | Start with starter control; unit stays on; transfers to load if utility fails | |
| Controls OFF | Stops unit; generator will not automatically start on utility failure; control and charger operate if utility power is available | |
| Controls SERVICE | Diagnostic mode to prevent remote commands and nuisance Mobile Link notifications during testing | |
| Ready to Run/Maintenance messages | Standard | |
| Engine Run Hours indication | Standard | |
| Programmable start delay | 2–1,500 seconds (dealer programmable) | |
| Utility nominal voltage setting | Adjustable 90–110% of 240V (default 100%) | |
| Utility Voltage Loss/Return to Utility adjustable (brownout setting) | Adjustable 75–80% dropout / 84–89% pickup | |
| Future Set Capable Exerciser/Exercise Set Error warning | Standard | |
| Run/Alarm/Maintenance logs | 50 events each | |
| Engine start sequence | Cyclic cranking | Engine cranks a maximum of five times at factory set intervals and durations |
| Starter lock-out | Starter cannot re-engage until 5 sec after engine has stopped | |
| Smart battery charger | Standard | |
| Charger Fault/Missing AC warning | Standard | |
| Low Battery/Battery Problem Protection and Battery Condition indication | Standard | |
| Automatic Voltage Regulation with Over and Under Voltage protection | Standard | |
| Under-Frequency/Overload/Stepper Overcurrent protection | Standard | |
| Safety Fused/Fuse Problem protection | Standard | |
| Automatic Low Oil Pressure/High Oil Temperature shutdown | Standard | |
| Overcrank/Overspeed (@ 72 Hz)/RPM Sense Loss shutdown | Standard | |
| High Engine Temperature shutdown | Standard | |
| Internal Fault/Incorrect Wiring protection | Standard | |
| Common external fault capability | Standard | |
| Automatically upgradable firmware via Cellular or Wi-Fi | Standard |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 2166 reviews
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Product Reviews
★★★★★ 5
Excellent, clean look
Style: 1-Speaker
Great wall plate for that clean, in wall wiring look. Easy to install and connections are solid.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 26, 2025
★★★★★ 4
Great...but could be a bit better
Style: 2-Speaker
Almost perfect. Easy to screw apart and insert wires to both the back and to the front, or do what I did and screw the wire onto the back and then use a banana plug for the front. My only complaints are that the back piece sits off the wall a little, so the plate doesn't fit flat and tight against the wall. It leave a little gap around the edges. The other complaint is that the back piece has some flex in it, which makes me nervous when I push plugs into and out of it. I think it probably will hold up fine, but it feels a little oogy to push banana plugs into it and see it flex. Comes with all the hardware needed. Just need a philips screwdriver and wire cutters and you're good to go. Super easy to use, and way better than the spring loaded connections it replaced.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 12, 2017
★★★★★ 5
Built well
Style: 4-Speaker
Still working great no issues with sound quality.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Really good wall plates
Style: 1-Speaker
These plates came on time, packaged well and are "doing the trick". The plates, while fairly light-weight are perfect for my new system. They installed into the junction boxes very easily, hold the wires snugly and the banana plugs are perfect for my usage.
If you need a nice, easy to install, good quality, wall plate, I would highly recommend these.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2025
★★★★★ 5
Is probably heaver than you think
Style: 4-Speaker
Quality is decent, weight is heavy, threads of the screw portion seem of quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
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