Generator Installation in Central & Southern NH

Reliable Whole-Home Backup Power by Licensed Local Electricians

When the power goes out, your home doesn’t have to go dark. With professional generator installation from our expert electricians in Southern New Hampshire, you can keep the lights on, your appliances running, and your family safe. We specialize in residential generator installation that gives you dependable backup power when you need it most.

Protect Your Home with Backup Power

Whether due to severe weather, infrastructure failure, or unexpected grid issues, power outages can happen at any time—and often without warning. A professionally installed standby generator automatically powers your home during an outage, ensuring you stay comfortable and connected.

We provide whole-home generator installation solutions designed for long-term reliability and seamless operation. Our licensed electricians will help you choose the right unit for your home’s needs, size it correctly, and install it to code—so it’s ready when you need it.

Why Choose Our Generator Installation Services?

  • ✅ Licensed & Insured Electricians

  • ✅ Custom-Fit Generator Solutions

  • ✅ Code-Compliant Installations

  • ✅ Reliable Whole-Home Backup Power

  • ✅ Seamless Transfer Switch Integration

  • ✅ Trusted Local Service in Southern NH

From start to finish, we handle every part of your generator installation—from evaluating your electrical panel and load requirements to safe, code-compliant setup of your generator and transfer switch.

Our Generator Installation Process

  1. Initial Consultation & Load Assessment
    We start by evaluating your home’s electrical load to determine the right size and type of generator.

  2. Generator Selection
    We'll help you choose a generator model that meets your specific needs, whether you want to back up the entire home or just essential circuits.

  3. Professional Installation
    Our team installs the generator, transfer switch, and all necessary connections with complete attention to safety and code compliance.

  4. Testing & Final Inspection
    After installation, we test the system thoroughly and walk you through how it works. You’ll know exactly what to expect when the power goes out.

Who Should Install a Home Generator?

Installing a generator is not a DIY job. It requires knowledge of your home’s electrical system, building codes, and manufacturer specifications. That’s why it’s essential to hire a licensed generator installer in New Hampshire who understands residential power infrastructure and follows all required regulations.

We install generators with long-term safety and performance in mind—so you’ll always be prepared when the power fails.

Why Homeowners Choose Lenn Johnson Electric For Their Generator Installation Needs

Licensed & Insured Electricians
Every project is handled by experienced professionals who meet local and national safety standards.

Upfront Pricing
No surprises — just honest, competitive pricing for top-quality work.

Prompt & Courteous Service
We respect your time, your home, and your schedule.

Commitment to Safety
Our work is always done to code, with your family’s safety as our top priority.

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Serving Homeowners Across Central & Southern New Hampshire

We proudly provide residential electrical services across many towns and communities throughout Central NH. Whether you’re renovating a home, building new, or just need a quick repair — Lenn Johnson Electric is ready to help.

Need fast service? Contact us today to schedule a free estimate or speak with a licensed residential electrician.

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Get a Free Residential Electrical Quote

Have an electrical project in mind? Reach out to Lenn Johnson Electric today. We’ll walk you through your options and provide a clear, no-obligation quote.

👉 Call (603)-496-3990
👉 Or Request a Quote Online

  • We calculate your home’s electrical load during the consultation and help you choose a generator that meets your backup power needs—whether you want to run essential systems or power your whole home.

  • Yes, and we take care of the permitting process for you. Our electricians follow all local codes to ensure your installation is compliant and safe.

  • Yes. A standby generator is installed with an automatic transfer switch, which senses the outage and starts your generator within seconds—without you lifting a finger.

  • Most installations take 1–2 days depending on the size of the generator and the layout of your electrical system. We’ll provide a detailed timeline during your consultation.

  • Absolutely. We can install a generator that powers your entire home or just select circuits—like your refrigerator, HVAC system, and lights.

  • We provide generator installation services across Central New Hampshire, including towns like Andover, Boscawen, Franklin, Henniker, Hopkinton, Concord, Manchester, Pembroke, and more. If you're unsure whether we serve your area, feel free to contact us — we're happy to help!

Why Choose Us?

  • High Quality Work

  • Quick Response

  • Locally Owned & Operated

  • Flexible 24/7 Hours

  • Excellent At Troubleshooting Electrical Problems

  • Specializing In Modern Kitchen Electrical Wiring & Wiring Of Historic Buildings

  • Wiring For New Home Additions

  • Commercial Electrical New Construction & Repairs

  • Over 16 Years In Business

  • Over 28 Years Of Experience

  • Electrician Since 1985

  • Master Electrician Since 1989