Meet the Generac Guardian 14 kW Generator
The Generac 7258 14kW standby generator keeps your home running automatically during outages, whether you use natural gas or propane. It delivers clean, stable power that’s safe for sensitive electronics, and it runs a quick weekly self-test so you know it’s ready when you need it. Built with Generac’s tough G-Force engine and an all-weather enclosure, it’s made for long-term reliability outdoors. With Mobile Link™ monitoring (Wi-Fi/Bluetooth and cellular options), you can check generator status and alerts right from your phone—anytime, anywhere. Pair it with the right automatic transfer switch to back up a few essential circuits or cover more of the home.
Powers 16 circuits of your home with the 100-amp, NEMA 3R (indoor or outdoor rated) transfer switch with aluminum enclosure.
Up to whole house protection with the 100, 150 or 200-amp, NEMA 3R (aluminum outdoor enclosure) smart switch.
Remote Monitoring & Control. Built-in Cellular Connectivity allows you to monitor performance and control your generator with Mobile Link App. Whether you're home or away. Provides real-time updates and maintenance alerts right on your device.*
Superior Reliability. Oil level sensors monitor oil level to help ensure generator readiness. Support in cold climates with improved cold start performance. Sloped roof & rear intake to reduce risk of ice or snow intrusion
Long Term Assurance. Every Generac Standby Generator comes with a 5-year limited warranty and 24/7/365 customer support.
Generac 7258 (14kW) Standby Generator Specifications
The Generac 7258 14kW home standby generator delivers dependable, automatic backup power when the utility goes out. It runs on natural gas (NG) or liquid propane (LP) and provides 120/240V single-phase power at 60 Hz, making it a great fit for most residential electrical systems.
Power Output & Electrical
-
Rated Output: 14,000 watts
-
Voltage: 120/240V, single-phase
-
Frequency: 60 Hz
-
Rated Amps: 58 amps
-
Main Circuit Breaker: 60 amps
Fuel Type & Consumption
-
Fuel Type: Natural Gas / Propane
-
Natural Gas (NG) Usage: 189 ft³/hr (50% load) | 243 ft³/hr (100% load)
-
Propane (LP) Usage: 1.76 gal/hr (50% load) | 2.92 gal/hr (100% load)
Noise Level & Cooling
-
Sound Rating: 55–65 dB at 7 meters
-
Cooling System: Air-cooled
Engine & Starting
-
Engine Brand: Generac
-
Displacement: 817cc
-
Engine Speed: 3600 RPM
-
Starting System: 12V automatic start
-
Low Oil Alert/Shutdown: Yes
Enclosure, Size & Weight
-
Enclosure: Composite
-
Dimensions (L × W × H): 46.4" × 26.3" × 30.7"
-
Weight: 391 lbs
Installation Notes, Certifications & Warranty
-
Transfer Switch: Required (automatic transfer switch not included)
-
Battery: Not included
-
UL Listed: Yes
-
Made in USA: Yes
-
Warranty: 5-year consumer / 5-year commercial
Generac 10kW Next Generation Generator
The next-generation 10kW (Model 7321) Generac air-cooled standby generator provides reliable, automatic backup power for your home during outages. Featuring Electronic Fuel and Ignition Control (EFIC) for higher output, improved fuel efficiency, and lower emissions, this generator is built with a maintenance-free engine and durable all-weather enclosure for long-term performance.
Pair it with a 16-circuit, 100-amp automatic transfer switch to keep essential circuits running seamlessly. With cellular connectivity and Mobile Link™ monitoring, you can check status and alerts remotely from your phone. Engineered and assembled in the USA, it’s backed by Generac’s 5-year limited warranty and 24/7 customer support.
Generac 14kW Next Generation Generator
The Generac 14kW (Model 7258) standby generator keeps your home running automatically during outages, whether you use natural gas or propane. It delivers clean, stable power that’s safe for sensitive electronics, and it runs a quick weekly self-test so you know it’s ready when you need it. Built with Generac’s tough G-Force engine and an all-weather enclosure, it’s made for long-term reliability outdoors.
With Mobile Link™ monitoring (Wi-Fi/Bluetooth and cellular options), you can check generator status and alerts right from your phone—anytime, anywhere. Pair it with the right automatic transfer switch to back up a few essential circuits or cover more of the home.
Generac 18kW Next Generation Generator
The Generac 18kW (Model 7259) standby generator is a strong choice for homeowners who want true whole-home protection—and it’s commonly recommended for homes around 1,500–2,500 sq ft (depending on what you want to run during an outage). It runs on natural gas or propane, starts automatically when the power goes out, and provides clean, stable power that’s safe for today’s sensitive electronics. It also keeps itself ready with automatic weekly self-tests.
One of the best parts is the built-in connectivity: with cellular + Wi-Fi + Bluetooth and Mobile Link™, you can check generator status and get alerts right from your phone, whether you’re home or away.
Generac 22kW Next Generation Generator
The Generac 22kW (Model 7260) standby generator is an excellent option for homeowners who want serious whole-home backup power, especially for larger homes or households with heavier electrical demands (multiple refrigerators, well pumps, sump pumps, electric cooking, larger HVAC loads, etc.). It runs on natural gas or propane, turns on automatically when the utility power drops, and delivers clean, steady power that’s safe for modern electronics. It also helps keep itself “battle-ready” with automatic weekly self-tests, so you’re not guessing when the next storm hits.
A big standout is the built-in connectivity—with cellular + Wi-Fi + Bluetooth and Mobile Link™, you can monitor generator status, receive alerts, and stay in the know right from your phone whether you’re home, at work, or traveling.
Generac 24kW Next Generation Generator
The Generac 24kW (Model 7261) air-cooled standby generator provides fast, dependable automatic backup power during outages. It’s a strong choice for whole-home protection and is commonly recommended for 3,000–4,000 sq ft homes (depending on which loads you want to run, like HVAC and pumps).
It delivers up to 24kW on propane (LP) and 22.5kW on natural gas (NG), connecting to your existing fuel supply for extended outage support. It starts within seconds of a power loss and runs until utility power returns. With built-in cellular Mobile Link, you can monitor status and receive alerts on your phone.
It also includes 24/7/365 U.S.-based support, a 5-year limited warranty, and is assembled in the USA (using domestic and foreign parts).
Generac 26kW Next Generation Generator
The Generac 26kW (Model 7327) air-cooled standby generator is built for homeowners who want strong whole-home backup power—especially in larger houses or homes with heavier electrical demand. It’s commonly recommended for ~3,500–4,500 sq ft homes (depending on what you plan to run during an outage, like multiple A/C units, well pumps, sump pumps, and other big loads).
It delivers up to 26kW on propane (LP) and 24kW on natural gas (NG), connecting to your existing fuel supply for extended outage coverage. When the utility goes out, it starts automatically, restores power quickly, and runs until the grid returns. With built-in cellular Mobile Link, you can monitor generator status and receive alerts right from your phone. It also includes 24/7/365 U.S.-based support, a 5-year limited warranty, and is assembled in the USA (using domestic and foreign parts).
Generac 28kW Next Generation Generator
The Generac 28kW (Model 7282) air-cooled standby generator is Generac’s most powerful air-cooled home standby option—ideal for homeowners who want maximum whole-home backup power. It’s commonly chosen (and often recommended) for larger homes around 4,500+ sq ft, or for households with heavy electrical demand like multiple HVAC systems, well pumps, sump pumps, and other high-draw appliances.
It delivers up to 28kW on propane (LP) and 25kW on natural gas (NG), connects to your existing fuel supply for extended outage support, and starts automatically when the power goes out—then runs until utility power is restored. With built-in cellular Mobile Link, you can monitor status and receive alerts right from your phone. You also get 24/7/365 U.S.-based support, a 5-year limited warranty, and a unit that’s assembled in the USA (using domestic and foreign parts).
Say Goodbye to Power Outages With a Generac Generator
Serving New Jersey since 2010, Green Sun Energy Services specializes in Generac home backup generators. With thousands of satisfied customers, we offer expert installation, flexible payments, and top warranties—making backup power simple and worry-free!
Primary Generator Service Areas In New Jersey
Green Sun Energy Services delivers professional whole-home standby generator installation, maintenance, and repair across Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties. As a certified Generac installer, we help homeowners safeguard their property with reliable backup power solutions designed for New Jersey’s demanding weather and frequent outages. Our expert team ensures every generator system is sized correctly, installed to code, and maintained for long-term performance. Explore our primary service areas below to see how we keep homes powered and protected.
Monmouth County - Aberdeen | Allenhurst | Allentown | Asbury Park | Atlantic Highlands | Avon-by-the-Sea | Belford | Belmar | Bradley Beach | Brielle | Clarksburg | Cliffwood Beach | Colts Neck | Cream Ridge | Eatontown | Englishtown | Fair Haven | Farmingdale | Fort Monmouth | Freehold | Freewood Acres | Hazlet | Highlands | Holmdel | Hornerstown | Howell | Imlaystown | Keansburg | Keyport | Leonardo | Lincroft | Little Silver | Loch Arbour | Locust | Long Branch | Manalapan | Manasquan | Marlboro | Matawan | Middletown | Millhurst | Millstone | Monmouth Beach | Navesink | Neptune | Oakhurst | Ocean Township | Oceanport | Port Monmouth | Red Bank | Robertsville | Roosevelt | Rumson | Sea Bright | Sea Girt | Shrewsbury | Smithburg | Southard | Spring Lake | Strathmore | Tinton Falls | Union Beach | Wall Township | Wanamassa | Wickatunk
Ocean County - Barnegat Light | Barnegat Township | Bay Head | Beach Haven | Beachwood | Berkeley Township | Brick Township | Dover Beaches | Eagleswood Township | Forked River | Harvey Cedars | Island Heights | Jackson Township | Lacey Township | Lanoka Harbor | Lakehurst | Lavallette | Little Egg Harbor Township | Long Beach Township | Manchester Township | Manahawkin | Mantoloking | Mystic Island | Ocean Gate | Ocean Township | Pine Beach | Plumsted Township | New Egypt | Point Pleasant | Seaside Heights | Seaside Park | Ship Bottom | Stafford Township | Surf City | Toms River Township | Tuckerton | Waretown | Whiting
Middlesex County - Avenel | Barber | Brownville | Carteret | Chrome | Clearbrook Park | Colonia | Concordia | Cranbury | Crossmans | Dayton | Dunellen | East Brunswick | Edgebrook | Ernston | Fords | Gillespie | Heathcote | Helmetta | Highland Park | Jamesburg | Kendall Park | Laurence Harbor | Lincoln Park | Madison Park | Melrose | Metuchen | Middlesex | Milltown | Monmouth Junction | Monroe Township | Morgan Heights | New Brunswick | Old Bridge | Perth Amboy | Piscataway | Plainsboro | Port Reading | Princeton Meadows | Raritan Gardens | Rossmoor | Sayre Woods | Sayreville | Sewaren | Society Hill | South Amboy | South Plainfield | South River | Spotswood | Westons Mills | Woodbridge
Somerset County - Belle Mead | Bernardsville | Blackwells Mills | Blawenburg | Bound Brook | Bradley Gardens | Bridgewater | Clyde | East Millstone | Far Hills | Finderne | Franklin Township | Gladstone | Green Knoll | Griggstown | Harlingen | Hillsborough | Kingston | Manville | Martinsville | Middlebush | Millstone Borough | Mine Brook | North Plainfield | Peapack | Pleasant Plains | Raritan | Rocky Hill | Skillman | Somerset | Somerville | South Bound Brook | Ten Mile Run | Voorhees | Watchung | Weston | Zarephath
Mercer County - Ewing | Groveville | Hamilton Square | Hightstown | Hillcrest | Hopewell | Lawrenceville | Mercerville | Pennington | Princeton | Robbinsville | Trenton | Twin Rivers | White Horse | Yardville
Union County - Berkeley Heights | Clark | Cranford | Elizabeth | Fanwood | Garwood | Hillside | Kenilworth | Linden | Mountainside | New Providence | Plainfield | Rahway | Roselle | Roselle Park | Scotch Plains | Springfield Township | Summit | Union Township | Westfield | Winfield Township
See What Our Clients Have to Say
Solar, Roofing, EV Chargers, Generators, Soft Washing & Holiday Lighting