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Generac Generator Installation, Service & Maintenance in Shrewsbury, NJ

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Discreet, Code-Compliant Backup Power for Shrewsbury Homes

Shrewsbury, NJ is known for its historic homes, established neighborhoods, and newer luxury residences, all within a relatively compact footprint. Power outages caused by coastal storms, high winds, fallen trees, and aging utility infrastructure can disrupt daily life—especially in neighborhoods with older electrical systems.

Green Sun Energy Services, LLC provides Generac standby generator installation, service and maintenance in Shrewsbury, NJ, from our base in Middletown. As a Generac Authorized Sales & Service Dealer, we design backup power systems that deliver dependable performance while carefully accounting for zoning requirements, setbacks, noise considerations, aesthetics, and local code compliance.
Generac Authorized Sales and Service Dealer logo.

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Customer Reviews for Solar, Roofing, EV Chargers, Generators, Soft Washing & Holiday Lighting

  • GusFarmingdale, NJ · 2026
    Reviewed us onGoogle

    Excellent service, follow-up, and an outstanding experience throughout the entire process! We were extremely happy with Green Sun…

    Read more

    …Energy Services from the first day through the final Township approvals. They even coordinated with the gas company to install a larger gas meter for our new generator. A special thank-you to Jennifer for her consistent follow-up and help getting everything completed. We highly recommend the team! Gus & Joan Vergara

    See the project
  • Holmdel, NJ · 2026
    Reviewed us onGoogle

    John and Auston were a stellar team, their attention to detail was amazing. Thank you!

    See the project
  • JeannieMorganville, NJ · 2026
    Reviewed us onGoogle

    We purchased a generator last October and it was installed by Green Sun Energy Services. There were a few delays beyond their…

    Read more

    …control (snow, town permits, technical problem with the actual generator), but I was so pleased with the professionalism of everyone I dealt with Glen, Karen, Jennifer, Chris and all the technicians who worked to install our generator. Early this morning I experienced our first extended loss of power due to a large tree falling in the area. After a few seconds in the dark and some supernatural sounds, our generator powered right up. Nine hours later power is still out but our generator is going strong. Definitely one of the best purchases we've made!

    See the project
  • BarryLambertville, NJ · 2026
    Reviewed us onGoogle

    Austin visited for the yearly maintenance on our generator. He was courteous, pleasant, and professional. He explained everything…

    Read more

    …he did in detail. I appreciate that Green Sun keeps track of the maintenance schedule so I don't have to. Great service.

    See the project
  • ThomasMiddletown, NJ · 2026
    Reviewed us onGoogle

    Mike serviced and installed a new battery for my generator.He did a great job and was very helpful with all my questions.Thank You.

    See the project
  • Ronald and RobinFair Haven, NJ · 2026
    Reviewed us onBBB

    As an engineer, I appreciate and recognize what it takes to plan and execute an excellent job, and thats what Green Sun Energy…

    Read more

    …did for us with the installation, and now ongoing maintenance, of our stand-by generator.

    See the project
  • AnnamariaRed Bank, NJ · 2026
    Reviewed us onYelp

    Our annual service was done yesterday by John he was amazing and has been serving our generator for a few years now, the whole team is amazing!

    See the project
  • Steve and LisaScotch Plains, NJ · 2026
    Reviewed us onYelp

    Mike was great! Thorough and professional!! Took the time to explain what he did/replaced.

    See the project
  • MarcinParlin, NJ · 2026
    Reviewed us onGoogle

    Great generator service and troubleshooting by Auston. Highly recommend the company.

    See the project

Custom Generac Generator Solutions for Shrewsbury Properties

Shrewsbury homes often require thoughtful generator planning due to tighter lots, proximity to neighboring homes, and architectural considerations—particularly in historic areas.

We design custom Generac generator solutions that fit seamlessly within your property. Whether you need essential backup for heating and refrigeration or near whole-home coverage for modern electrical demands, each system is tailored to your home’s layout and priorities.

Generac Generator Installation Services in Shrewsbury, NJ

Clients holding Green Sun Energy Services, LLC lawn sign near their newly installed Generac home standby generator in Shrewsbury NJ

A permanently installed Generac standby generator restores power automatically—often within seconds of an outage. No refueling, no extension cords, and no manual operation required.

Our Installation Process for Shrewsbury Homes

We manage the entire installation process with precision and local expertise:

    • Electrical load analysis and generator sizing

    • Evaluate and select the optimal generator location to balance safety, zoning compliance, noise limitations, aesthetics, and overall cost

    • Permit coordination with Shrewsbury Borough

    • Code-compliant electrical and gas connections

    • Automatic transfer switch installation

    • Full system testing and homeowner walkthrough

Each installation is designed for essential backup, managed whole-home coverage, or full-home power, depending on your needs.

Learn More About Generator Sizing & Installation

Generac Generator Service & Maintenance in Shrewsbury, NJ

“Green Sun Energy Services technician performing scheduled maintenance on a Generac standby generator

Routine service is critical to ensure reliable generator performance—especially for systems supporting older or fully renovated homes.

Our Generator Maintenance Services Include:

    • Annual preventive maintenance, including:

      • Spark plug replacement

      • Valve lash adjustment

      • Air filter replacement

      • Oil and filter changes

      • Battery inspection

      • Load testing and system diagnostics

      • Firmware updates and performance checks

    • Generac warranty and repair service by certified technicians

    • Optional Generac Mobile Link™ monitoring, providing proactive alerts and system oversight

Regular maintenance extends generator life and helps prevent failures during severe weather.

Learn More About Generator Maintenance

Talk to a New Jersey-Based Generator Expert Today!

Got questions about installing or maintaining a Generac generator? Our highly trained team is here to provide expert answers—whether it’s a quick question or a detailed discussion. Let’s find the perfect solution for you!
Let's Get Started

Get the Unbeatable Protection of a Generac Generator!

When the power goes out, your Generac standby generator turns on automatically—usually within seconds—so your home stays safe and comfortable. That means your heat or A/C, refrigerator, sump pump, Wi-Fi, lights, and essential systems can keep running without you doing anything.

Unlike portable generators, a standby generator is permanently installed, starts and stops on its own, and runs on your home’s natural gas or propane—so there’s no refueling, no extension cords, and no scrambling during a storm.

Choose the Right Level of Backup Power

Generac standby generators range from 10–28kW, supporting homes from about 1,000 sq. ft. to 6,000+ sq. ft. depending on what you want to power. We’ll review your needs and design the right solution for your home and budget:

    • Essential Power Coverage – Keeps the most important circuits running (like heat, fridge, sump pump, and some lights).

    • Whole-Home Backup – Powers most or all of your home for the most seamless “business as usual” experience.

    • Managed Whole-Home Backup – A flexible middle-ground that uses Generac load management to deliver near whole-home coverage with a smaller generator—balancing comfort, performance, and cost.

We Handle Everything

We manage the entire process for you, making generator installation simple and stress-free.

    • Financing options available (if needed) — terms from 12 months up to 12 years.
    • Right-size your generator based on your home and priorities.
    • Determine the best generator location for safety, performance, code compliance, and ease of service.
    • Handle permits and utility/gas coordination.
    • Professional installation of the generator, transfer switch, and all connections.
    • Full testing and inspection support so it’s ready for real outages.
    • Ongoing service and maintenance, with optional remote monitoring and annual tune-ups using genuine Generac parts.

Why Choose a Generac Standby Generator

  • Automatic operation – Your generator senses an outage and turns on automatically—then shuts off when utility power returns. You’re protected whether you’re home, at work, or away on vacation.

  • No refueling – It runs on your home’s existing natural gas or propane supply, so you’re not dealing with gas cans, refills, or long lines during storm season.

  • Safe, direct power – A professionally installed transfer switch feeds power straight into your electrical panel, eliminating extension cords and reducing the risk of unsafe backfeeding.

  • Strong warranty options – Choose 5-, 7-, or 10-year coverage options for added confidence, with support available if your generator needs service.

  • Added home value – Standby power is a major selling point for buyers who want reliability, comfort, and protection for essential systems during outages.

Generac Generator Orientation

Generac Standby Generators for Reliable Home Backup Power

Generac next generation whole-home standby generator for a residential property.

Generac air-cooled standby generators are among the most advanced and reliable systems in their class, engineered to deliver dependable, fully automatic backup power when the electrical grid goes down. Designed to monitor utility power 24/7, these generators start on their own within seconds of an outage, restoring electricity seamlessly to help keep your home operating normally and your family safe, comfortable, and connected. From essential appliances to heating, cooling, and critical systems, a Generac standby generator provides confidence when storms, accidents, or utility failures strike. With proven performance and trusted technology, you gain real peace of mind knowing your home is prepared for the unexpected. We’ll guide you through the available options below to help you choose the right Generac system for your home and energy needs.

Generac air-cooled standby generators deliver dependable, automatic backup power when the grid goes down. They start within seconds of an outage to keep your home running and your family comfortable. We’ll help you choose the right Generac system from the options below.

10kW 14kW 18kW 22kW 24kW 26kW 28kW
10kW

10kW Generac Generator

The Generac Next Generation 10kW Generator offers reliable backup power with 10,000 watts on propane and 9,000 on natural gas. It features a durable engine, clean power for devices, quiet self-tests, and a weather-resistant design. It can be installed with an essential circuit transfer switch supporting 10–12 circuits or a whole-house transfer switch capable of powering a 1,500-square-foot home. 4G Remote monitoring makes it easy to stay connected.

Specifications for the 10kW Generac Generator

      • Rated kW LPG/NG: 10/9
      • Main Line Circuit Breaker: 45 amp
      • Amps @ 240V LPG: 41.7
      • Amps @ 240V NG: 37.5
      • Operating RPM: 3600
      • Engine: Generac G-Force 400 Series
      • Engine Displacement: 459cc
      • Fuel Consumption @ Full Load – NG cu. ft/hr: 127
      • Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 54 (1.48)
      • db(A) at Normal Operating Load: 61
      • Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
      • Weight (lb): 334
14kW
18kW
22kW
24kW
26kW
28kW

Generac Scheduled Maintenance & Service Plans for New Jersey Homeowners

Our Annual Service Plans for New Jersey homeowners include regular maintenance, expert monitoring, and extended warranty options to ensure your Generac standby generator operates at its best. These plans provide peace of mind with comprehensive care and support, ensuring reliable power when you need it most.

Diamond

  • Best for total peace of mind—annual maintenance, extended parts/labor warranty, and Green Sun–managed remote monitoring.
  • Our scheduled maintenance service includes spark plug and air filter replacement, oil and filter changes, battery inspection, load testing and system diagnostics, firmware updates, and full performance checks.
  • Generac's extended warranty covers parts and labor for 5, 7, or 10 years from the date of activation and can be purchased anytime within 10 years.
  • Includes Green Sun managed Wi-Fi or cellular monitoring.
  • Pre-paid annually with 5-Years of price protection.

Get A Free Maintenance Estimate

Gold

  • Best for strong protection without monitoring—annual maintenance plus extended parts/labor warranty for dependable coverage.
  • Our scheduled maintenance service includes spark plug and air filter replacement, oil and filter changes, battery inspection, load testing and system diagnostics, firmware updates, and full performance checks.
  • Generac's extended warranty covers parts and labor for 5, 7, or 10 years from the date of activation and can be purchased anytime within 10 years.
  • Does NOT include Green Sun Wi-Fi or cellular monitoring.
  • Pre-paid annually with 5-Years of price protection.

Get A Free Maintenance Estimate

Silver

  • Best for budget-friendly upkeep—annual maintenance with Generac’s standard warranty, keeping your system ready year-round.
  • Our scheduled maintenance service includes spark plug and air filter replacement, oil and filter changes, battery inspection, load testing and system diagnostics, firmware updates, and full performance checks.
  • Generac's standard 5-year, limited warranty includes full coverage for 2 years, limited parts coverage for 3 years, and engine/alternator coverage in years 4-5.
  • Does NOT include Green Sun Wi-Fi or cellular monitoring.
  • Pre-paid annually with 5-Years of price protection.

Get A Free Maintenance Estimate

Why Choose Green Sun Energy Services for Generac Generator Installation & Service?

At Green Sun Energy Services, we’ve proudly served Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties since 2010. We’re licensed, insured, and bonded, and our team is Generac Sales & Service certified, specializing in Generac home standby generators that deliver reliable backup power during unexpected outages. With thousands of happy customers, we’ve earned trust through quality workmanship and ongoing local support. We make the process simple with flexible financing options, expert system design and installation, and strong warranty support. Let us help you protect your home and family with a Generac generator.

Since 2010, Green Sun Energy Services has helped homeowners across Monmouth and nearby NJ counties stay protected with reliable Generac standby power. We’re licensed, insured, and bonded, and Generac Sales & Service certified, providing expert installation, maintenance, and local support. With flexible financing, professional design/installation, and strong warranty options, we make it easy to protect your home and family.

Locally owned and operated

Our local team professionally installs and services Generac generators in Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties.

Focused on long-term relationships

Dedicated to building lasting customer relationships through trust, reliability, and long-term service and support.

Flexible payment solutions

Dozens of payment options to make home backup solutions accessible and affordable for nearly every homeowner.

Industry-leading products, workmanship, and warranty

Industry-leading products, Generac certified technicians, expert workmanship, and 5-star service to ensure superior quality, and performance.

Whether you’re installing a new generator or maintaining an existing system, we provide the local expertise and long-term support homeowners expect from a trusted generator provider.

Get A Hassle-Free Generator Estimate

Why Backup Power Matters in Shrewsbury, NJ

Shrewsbury homeowners experience power outages due to coastal storm exposure, tree-lined streets, and aging utility lines. Over the past decade, Monmouth County homes have averaged multiple outages per year, with some lasting 6–24 hours or longer following major storm events.

Power outages can impact:

    • Heating and cooling systems

    • Refrigeration and food safety

    • Home offices and remote connectivity

    • Sump pumps and basement protection

    • Security and alarm systems

    • Medical or lifestyle-critical equipment

A Generac standby generator restores power automatically—keeping your home safe, functional, and comfortable.

Generator Questions from Shrewsbury Homeowners

Can a generator be installed on a smaller or historic property in Shrewsbury?
Yes. We specialize in installations that respect historic homes, tight setbacks, zoning rules, and neighborhood aesthetics.

Are permits required for generator installation in Shrewsbury?
Yes. Generator installations require local permits, which we handle as part of the installation process.

For more detailed answers about generator sizing, run time, fuel use, and maintenance, visit our Generator FAQs page.

Service area map showing Generac generator installation and maintenance coverage in Monmouth County, New Jersey.

Local Generator Installation, Service & Maintenance Near Shrewsbury, NJ

We proudly serve Shrewsbury and nearby communities, including:
Shrewsbury • Little Silver • Red Bank • Fair Haven • Rumson • Tinton Falls • Middletown • Eatontown

More of our work near Shrewsbury

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Solar, Generator and Holiday LightingA Client Since 2012

Installed by us, and now on our service plan

Client since October 2012

Green Sun Energy is a Class A outfit. I did my research before taking the plunge, and nothing else even compared. They are detail oriented, and do an excellent job (I am VERY picky). No complaints. Executed as promised. Job done right. Highly recommend." - Bruno M.…

Bruno2018Reviewed us onAngiFacebookGoogle

See the project →

Talk to a New Jersey-Based Generator Expert Today!

Got questions about installing or maintaining a Generac generator? Our highly trained team is here to provide expert answers—whether it’s a quick question or a detailed discussion. Let’s find the perfect solution for you!
Let's Get Started

See What Our Clients Have to Say

  • GusFarmingdale, NJ · 2026
    Reviewed us onGoogle

    Excellent service, follow-up, and an outstanding experience throughout the entire process! We were extremely happy with Green Sun…

    Read more

    …Energy Services from the first day through the final Township approvals. They even coordinated with the gas company to install a larger gas meter for our new generator. A special thank-you to Jennifer for her consistent follow-up and help getting everything completed. We highly recommend the team! Gus & Joan Vergara

    See the project
  • Holmdel, NJ · 2026
    Reviewed us onGoogle

    John and Auston were a stellar team, their attention to detail was amazing. Thank you!

    See the project
  • JeannieMorganville, NJ · 2026
    Reviewed us onGoogle

    We purchased a generator last October and it was installed by Green Sun Energy Services. There were a few delays beyond their…

    Read more

    …control (snow, town permits, technical problem with the actual generator), but I was so pleased with the professionalism of everyone I dealt with Glen, Karen, Jennifer, Chris and all the technicians who worked to install our generator. Early this morning I experienced our first extended loss of power due to a large tree falling in the area. After a few seconds in the dark and some supernatural sounds, our generator powered right up. Nine hours later power is still out but our generator is going strong. Definitely one of the best purchases we've made!

    See the project
  • BarryLambertville, NJ · 2026
    Reviewed us onGoogle

    Austin visited for the yearly maintenance on our generator. He was courteous, pleasant, and professional. He explained everything…

    Read more

    …he did in detail. I appreciate that Green Sun keeps track of the maintenance schedule so I don't have to. Great service.

    See the project
  • ThomasMiddletown, NJ · 2026
    Reviewed us onGoogle

    Mike serviced and installed a new battery for my generator.He did a great job and was very helpful with all my questions.Thank You.

    See the project
  • Ronald and RobinFair Haven, NJ · 2026
    Reviewed us onBBB

    As an engineer, I appreciate and recognize what it takes to plan and execute an excellent job, and thats what Green Sun Energy…

    Read more

    …did for us with the installation, and now ongoing maintenance, of our stand-by generator.

    See the project
  • AnnamariaRed Bank, NJ · 2026
    Reviewed us onYelp

    Our annual service was done yesterday by John he was amazing and has been serving our generator for a few years now, the whole team is amazing!

    See the project
  • Steve and LisaScotch Plains, NJ · 2026
    Reviewed us onYelp

    Mike was great! Thorough and professional!! Took the time to explain what he did/replaced.

    See the project
  • MarcinParlin, NJ · 2026
    Reviewed us onGoogle

    Great generator service and troubleshooting by Auston. Highly recommend the company.

    See the project

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

Ocean County

Show all 42 Ocean towns
  • Harvey Cedars
  • Island Heights
  • Lacey Township
  • Lakehurst
  • Lanoka Harbor
  • Mystic Island
  • Ocean Gate
  • Ocean Township
  • Pine Beach
  • Plumsted Township
  • Ship Bottom
  • Stafford Township

Middlesex County

Show all 54 Middlesex towns
  • Edgebrook
  • Ernston
  • Gillespie
  • Heathcote
  • Highland Park
  • Jamesburg
  • Lincoln Park
  • Madison Park
  • Melrose
  • Middlesex
  • Milltown
  • Morgan Heights
  • New Brunswick
  • Perth Amboy
  • Port Reading
  • Princeton Meadows
  • Raritan Gardens
  • Rossmoor
  • Sayre Woods
  • Sewaren
  • Society Hill
  • South Amboy
  • South River
  • Westons Mills

Somerset County

Show all 41 Somerset towns
  • North Plainfield
  • Peapack
  • Pleasant Plains
  • Raritan
  • Rocky Hill
  • South Bound Brook
  • Ten Mile Run
  • Voorhees
  • Watchung
  • Weston
  • Zarephath

Mercer County

Union County

Other Areas Serviced

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