Sub Panel Installation and 300 Amp Service in Northern New Jersey

Gareffa Electric installs a sub electrical panel, upgrades homes to a 300 amp panel and prepares main panels for solar across Bergen, Hudson, Essex and Passaic counties in Northern New Jersey. Call (973) 662-4333 or book a service call online, and we call you to set the visit time.

Sub panel installation for a garage, addition or basement

A sub panel gives a new part of the house its own set of breakers, fed from your main panel. Our licensed electricians handle sub panel installation for homeowners who are adding space or load.

Detached or attached garage

Setting up a workshop, a home gym or circuits for a garage? Tell us what you plan to run there and we will talk through the sub panel with you.

Home addition

Building an addition or a new living space? A sub panel can serve the new rooms. Tell us the size of the space and what it will be used for.

Finished basement

Finishing a basement and the main panel has no room left? Call us and we will look at the panel and the plan.

300 amp service for your home

Our service work covers 100A to 4000A, and that includes 300 amp residential service. If your home has outgrown its current service, a 300 amp panel may be the next step. It is a larger job than a repair, so tell us about your panel and your plans and we will go over the price with you before work starts. For a standard upgrade, see our 200 amp panel upgrade page. For everything else, see panel upgrades.

Main panel upgrade for solar-ready homes

Planning solar? We do the electrical side: a main panel upgrade so your home is ready for it. We do not install solar panels. Your solar company handles the panels. We handle the electrical panel and service. Tell us when you book that the upgrade is for solar.

What to tell us when you call

• Your current service size, if you know it (100 amp, 200 amp or other). A photo of the panel door helps.
• What you plan to add: a garage or workshop, an addition, a finished basement, an EV charger, solar or more circuits.
• Where the new space or equipment will be in the house.
• Whether you want a sub panel, a bigger main service, or you are not sure yet.

How booking works

1. Call (973) 662-4333, or book the $150 scheduled service call at /products/estimate-visit.
2. We call you to set the visit time. We cannot promise an exact time in advance.
3. A licensed electrician from our crew goes over your project with you and tells you the price before work starts.

Same-day or next-day dispatch is available, and we are often there within 2 to 4 hours of booking.

What a service call costs

The $150 scheduled service call includes a diagnostic plus the first hour of work. A same-day service call is $350. On jobs over $1,500, the service fee is credited toward the total. Sub panel and service upgrades are larger projects, and we tell you the price before work starts.

Why homeowners call us

We are a family-owned electrical contractor, not a national franchise. We hold NJ Electrical Contractor License #18578 and carry $2M in liability insurance. Every job is permitted in our name and done by licensed electricians on our crew. Bond is available on request.

What we do not do

• We do not install solar panels. We do the electrical panel and service side only.
• We work Monday to Saturday, 7 AM to 6 PM, closed Sunday.

Sub panel and 300 amp FAQ

Can you add a sub panel in my garage?

Yes. Book a service call, tell us what you plan to run in the garage, and we will go over the sub panel with you.

Do I need a 300 amp panel?

It depends on your current service and what you plan to add. Tell us your service size and your plans when you call, and an electrician will look at your panel in person.

Do you install solar panels?

No. We do the main panel upgrade for solar-ready homes, which is the electrical side only. Your solar company installs the panels.

How much does a panel upgrade cost?

We tell you the price before work starts. You can book the $150 scheduled service call, and the fee is credited toward the total on jobs over $1,500.

Which towns do you cover?

We work across Bergen, Hudson, Essex and Passaic counties from Nutley, NJ. Call us and we will confirm your town.

Call (973) 662-4333 or book a service call. Open Monday to Saturday, 7 AM to 6 PM, closed Sunday. Serving Bergen, Hudson, Essex and Passaic counties, NJ.