If your home was built more than 20 years ago, there's a good chance your electrical panel is struggling to keep up. Between EV chargers, heat pumps, home offices, and modern kitchen appliances, today's households draw significantly more power than homes were originally designed to handle.
Flickering lights, tripping breakers, and panels well past their safe operating life are common in older Southern Maine homes. An electrical panel upgrade isn't just a convenience improvement — it's a safety upgrade that protects your family and your home.
Signs Your Panel Needs an Upgrade
Not sure if your panel is due for replacement? Here are the common warning signs in homes across Portland, Westbrook, and Scarborough:
- Frequent breaker trips — If you're resetting breakers regularly, your panel is telling you it can't handle the load.
- Burning smell or scorch marks — This is a fire hazard and requires immediate attention.
- Fuse box instead of breaker panel — Fuse boxes are outdated and don't meet modern safety codes.
- Buzzing or crackling sounds — These indicate loose connections or arcing, which can cause fires.
- You're adding major appliances — Heat pumps, EV chargers, and hot tubs all require dedicated circuits your old panel may not support.
Panels With a Known Reputation
Some older panel brands have a widely reported history of problems. Federal Pacific Electric (FPE) panels with Stab-Lok breakers and Zinsco panels are the two most often cited: the concern is that breakers may fail to trip under overload or that bus connections can overheat. If your panel carries either name, have a licensed electrician evaluate it — and expect replacement to be recommended. Home inspectors and insurers frequently flag both brands during a sale or a policy renewal.
100 Amps or 200 Amps?
The right service size comes from a load calculation, not a rule of thumb. The National Electrical Code provides a standard method for existing homes that adds up general lighting and receptacle load, appliances, and heating or cooling, and compares the total to the service rating. A home with oil or gas heat and a gas range can live comfortably on 100 amps. A home switching to heat pumps, adding an electric water heater, and planning an EV charger usually cannot. That is why Maine's shift toward heat pumps has made service upgrades more common: the heating load that used to come from an oil tank now comes through the panel.
What Does a Panel Upgrade Involve?
A typical panel upgrade with Goodnow Electric replaces your existing panel with a modern 200-amp service panel, which gives most homes capacity for current and future needs. A full service upgrade usually covers more than the panel itself:
- Permit — pulled before work starts.
- Utility coordination — the utility (Central Maine Power across most of Greater Portland) disconnects and reconnects the service; we schedule that for you.
- Meter socket and service entrance — often replaced along with the panel, since a larger service needs a larger meter socket and conductors.
- Grounding and bonding — brought up to current code, which older services frequently are not.
- Circuit transfer and labeling — every existing circuit moved to the new panel, with AFCI or GFCI protection added where code now requires it, and a clear directory on the door.
- Inspection and reconnection — once the inspector signs off, the utility restores permanent power.
Most panel swaps are finished in a day, with the power off for part of it.
What Affects the Cost?
The biggest variables are whether the meter socket and service entrance cable need replacing, whether the utility has to upgrade its drop, how much the grounding needs correcting, how many circuits need new AFCI or GFCI breakers, and whether the panel is moving to a new location. We give every homeowner a free written estimate after looking at the existing service.
For homeowners planning a kitchen or bathroom remodel, we often recommend combining the panel upgrade with the residential electrical work for the remodel — it's more efficient and cost-effective to do both at once.
The EV Charger Connection
A common reason for a panel upgrade today is EV charger installation. A Level 2 home charger typically needs a 40- to 60-amp dedicated circuit. If your panel is already near capacity, you may need an upgrade — or a load-management device — before the charger can be installed. We handle both the panel upgrade and charger installation as a single project, saving you time and money.
Smart Homes Need Smart Panels
If you're investing in smart home technology — automated lighting, security systems, smart thermostats — a modern panel is the place to add whole-home surge protection, which guards sensitive electronics against spikes from lightning and utility switching. Homeowners in Gorham, Windham and other towns with long overhead lines are especially exposed to storm-related surges.
New Construction & Solar
For new construction projects, we install panels that are sized for both current needs and future expansion. And if you're considering solar panel installation, your electrical panel needs to be compatible with a solar inverter and potentially battery storage — another reason to ensure your panel is modern and properly sized.
Frequently Asked Questions
Is a fuse box dangerous? Not automatically, but fuse boxes are often undersized for modern homes, and the temptation to install a larger fuse than the wire can handle is a real fire risk. Many insurers also ask about them.
Will I lose power for long? Usually for part of one day, while the utility disconnect, the panel swap and the reconnection happen.
Can I add a sub-panel instead? A sub-panel adds breaker spaces but not capacity. If the load calculation shows the service is too small, a sub-panel will not fix it.
Local details are on our pages for panel upgrades in Portland and panel upgrades in Westbrook. If you are adding a standby generator at the same time, read whole-house vs. portable generators for Maine homes.
Why Choose Goodnow Electric?
When you work with Goodnow Electric for a panel upgrade, you get the owner on-site for every job. We're fully licensed, bonded, and insured, and we serve homeowners and businesses across South Portland, Falmouth, Cape Elizabeth, Saco, Biddeford, and all of Southern Maine.
We also handle commercial electrical panel upgrades for businesses that need to expand their capacity.
Curious whether your panel needs an upgrade? Contact us for a free assessment. You can also learn more about our team or browse our recent projects to see the quality of work we deliver.
Call us at (207) 318-1022 — we're available 24/7 for emergencies and happy to schedule a convenient time for a free estimate.