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Paul Larosee · 5-star Google review
July 20, 2026
Generac dealer · Home standby generators
Home Standby Generator Installation in MA & NH
Automatic backup power, planned for your home. Sylvester Electric installs home standby generators across the Merrimack Valley and Southern New Hampshire, with generator sizing, transfer-switch planning and a clear installation estimate.
Keep priority equipment running during an outage, even when you are away. We assess your electrical loads, fuel supply and installation location before recommending a system.
Not sure where to start? Tell us what you want to keep running.
Family-owned since 1979Based in Dracut, MAGenerac dealer4.7/5 from 963 Google reviews
Generac standby generators, installed by Sylvester Electric
Sylvester Electric is listed in Generac's official dealer locator. Search ZIP 01826 for our Dracut company listing.
The original job photographs on this page show our team working on Generac standby generator installations. We help you choose capacity and transfer equipment around the loads your home needs during an outage.
Have another generator brand in mind? Share its make and model so we can confirm installation compatibility.
A Generac installation customer’s experience
Fuel is part of the plan
Natural gas or propane?
For a standby generator, the right fuel choice depends on what is available at your property and what the selected equipment requires.
Natural gas
Connects to an available utility gas supply, so there is no on-site propane tank to refill. The meter, piping and available pressure need to support the generator along with other gas appliances.
Operation still depends on gas service remaining available.
Propane
Uses fuel stored in a tank at your property and can suit homes without natural gas service. Tank capacity, other propane appliances, placement and delivery access all need consideration.
Runtime depends on the usable fuel supply and electrical load; plan for refills during extended outages.
Know who handles the fuel work. The estimate should identify responsibility for gas piping, tank or meter changes and coordination with the fuel supplier or qualified fuel contractor. Sylvester's electrical installation scope is confirmed separately.
Tell us whether your home has natural gas or a propane tank when you request your estimate. You do not need to choose a fuel system before contacting us.
A plan built around your home
The right size starts with what you need to run
Square footage alone does not determine generator size. A load assessment considers your priorities and the starting demands of pumps, motors and heating or cooling equipment.
- Essential circuits or broader coverage: choose the equipment that matters most during an outage.
- Starting loads and load management: some equipment needs extra power to start; suitable load controls can help manage demand.
- Placement and connections: review openings, required clearances, access and the routes to your panel and fuel supply.
A whole-home system still has capacity limits. We discuss what can run together before equipment is selected.
Understand your estimate
What affects generator installation cost?
The equipment is one part of the project. A useful estimate explains the full installation scope and identifies work handled by others.
A generator does not automatically require a larger electrical service. If your existing equipment needs attention, explore panel replacement or 200 amp service upgrades.
- Generator size: the selected loads, starting demands and any load management determine the equipment needed.
- Automatic transfer switch: its rating, placement and connection to your existing service affect equipment and labor costs.
- Natural gas or propane connection: piping length, available supply, meter capacity or propane tank needs affect the fuel contractor’s scope.
- Trenching: underground routes, soil or rock, access and restoration can add labor and equipment costs.
- Wiring distance: longer runs between the generator, transfer switch and panel require more material and installation time.
- Permits and inspections: required approvals and fees depend on your town and the electrical, fuel and site work involved.
- Site preparation: a suitable pad, grading, delivery access and required clearances can change the installation plan.
Compare the complete installed scope. Confirm whether equipment, electrical work, fuel work, trenching, restoration and permit fees are included or priced separately. Your project estimate is based on the actual property and agreed work.
Equipment availability, fuel-work coordination and required approvals also affect scheduling. Confirm the scope and timing before work begins.
From assessment to homeowner walkthrough
Know what happens next and what your installation includes.
Assess your home
Discuss your town, backup priorities and existing generator, if any. Review electrical loads, panel compatibility, placement and fuel options.
Confirm your installation plan
Review the estimate, equipment, responsibilities and scheduling. The agreed scope guides electrical installation and coordination with other trades.
Test and explain the system
The agreed installation includes system checks and a walkthrough of operation, supported loads and the next steps for ongoing care.
Generator customers share their experience
“John came by on time and helped me with the hook up of my new Generator.”
Jerry Bisantz · 5-star Google review
August 9, 2026 · Excerpt
“I had Sylvester Electric install a generator transfer switch and two inlets, one outside and another inside.”
Luke Sato · 5-star Google review
February 2, 2023 · Excerpt
Already have a portable generator?
Portable connections are a separate option for homeowners who prefer manual setup and selected-circuit backup.
Manual operation
Portable-generator connections
A generator inlet and compatible transfer equipment connect a suitable portable generator to selected home circuits. You position and operate the generator and manage the loads.
Consider this if: you want essential-circuit backup and are comfortable with manual setup.
Already own a generator? Share its make, model and output. A transfer switch or approved, panel-compatible interlock and inlet must match your equipment and keep generator power separate from utility power. Never feed a generator into a household outlet.
Questions before you choose a generator
Can a generator power my whole house?
It depends on the generator capacity, your electrical loads and any load-management equipment. Start by identifying what must run during an outage. Some systems serve selected circuits; others are designed for broader coverage. “Whole home” does not mean every appliance can always run at once.
Will a standby generator switch on automatically?
A properly configured standby system with an automatic transfer switch detects an outage and starts the generator before transferring supported loads. There is a brief interruption while the system starts; it is not the same as an uninterruptible power supply.
Can I connect my existing portable generator?
Possibly. The generator's output and connection, the panel and the proposed transfer equipment must be compatible. A professional assessment can determine whether an inlet with a transfer switch or approved interlock is suitable. Never feed generator power into a household outlet.
Do generator installations need permits?
Requirements depend on your municipality and project scope. Electrical work, fuel connections and placement may involve separate approvals or inspections. Confirm who is responsible for each part before installation begins.
Where can a generator be placed?
Placement must follow the manufacturer's instructions and applicable local requirements. Windows, doors, vents and other openings matter. Portable generators must operate outdoors, away from the home and openings—not inside a garage, even with its door open. We discuss placement as part of planning the electrical connection.
What should I have ready when I contact you?
Your address, the equipment you want to keep running, your generator model if you own one, and any accessible photos of your electrical panel or proposed location. Do not remove electrical covers to take photos. Let us know about planned renovations so related electrical work can be considered together.
Let's plan your backup power
Tell us your town, the equipment you want to keep running, and whether you have natural gas or propane. We’ll help you plan a home standby generator installation.
Prefer the form below? Send your contact details so our team can discuss your project.
Nearby generator information: standby generator installation in Lowell, generator installation in Tewksbury and generator installation in Andover.
Based in Dracut, we also serve nearby Massachusetts and Southern New Hampshire homes. See our Dracut electrical services and Hudson, NH electrical services.
For more Southern NH information, explore local electrical service in Pelham or Salem. See our residential electrical services or contact us to confirm your address.
Request Your Generator Installation Estimate
Whole Home Generator
Transfer Switch Installation
What Our Customers are Saying
Technician arrived on time, he repaired the problem quickly and efficiently and I was happy with the cost ...not overcharged. I have already recommended the company to my friends and relatives.
★★★★★
Judy D.
They installed smoke and carbon monoxide detectors and two light fixtures. They were easy to work with and very professional.The technician was personable and knowledgeable.
★★★★★
Elena C.
The expertise and care applied to both fixing and installing new electrical wiring has been first rate. We have been impressed by the efficiency and ease of contact with the team. We recommend Sylvester for anyone looking for top tier and reliable electrical work at a fair price.
★★★★★
Anna K.
Licensed in Massachusetts & New Hampshire
MA Electrical Business #4328 A1
Master Electrician: MA #18290 A · NH #11225