Is Your Home Ready for More Power? 6 Signs You Need a Service Upgrade in Southern Maine
Does your home struggle when several appliances run at once? Are the lights flickering, breakers tripping, or new projects being delayed because your electrical panel is full?
The short answer is that your home may need more electrical capacity.
Many older homes in Saco, Biddeford, Scarborough, Westbrook, Gorham, and Portland still have 100-amp electrical service. That may have been enough when the home was built. Today, however, households use more power for heating, cooling, appliances, home offices, electric vehicles, and other modern equipment.
A service upgrade can help your home operate more safely and comfortably. Here are six signs it may be time to have a professional evaluation.
What is an electrical service upgrade?
Your electrical service is the amount of power your home can receive from the utility. The service includes more than the panel. It can also include the meter socket, service entrance conductors, main disconnect, grounding system, and related equipment.
A service upgrade from 100 amps to 200 amps may involve replacing several of these components. It is different from simply installing a larger panel.
Before recommending an upgrade, our team performs a load calculation. This helps determine whether your current service can safely support your existing and planned electrical loads.
1. Your lights flicker or dim when appliances turn on
Do the lights dim when the refrigerator starts? Do they flicker when you use the microwave, vacuum, heat pump, or other large appliance?
Occasional changes in brightness can have several causes, including a loose connection, an overloaded circuit, or an issue with the utility connection. These symptoms should not be ignored, especially if they happen regularly.
Flickering lights may mean that your electrical system is struggling to handle demand. A qualified electrician can inspect the panel, wiring, and connections to identify the cause.
A service upgrade may be part of the solution, but the first step is always a professional diagnosis.
2. Your breakers trip frequently
Circuit breakers are designed to shut off power when a circuit is overloaded or has a fault. Resetting a breaker once in a while may happen. Resetting breakers every week, or whenever certain appliances run together, is a warning sign.
Frequent trips may point to:
Too many devices on one circuit
An overloaded circuit
A short circuit or wiring problem
A failing breaker
An electrical service that no longer meets your home’s needs
Do not replace a breaker with a larger one to stop it from tripping. The breaker protects the wiring, and using the wrong size can create a serious safety hazard.
Our experienced technicians can inspect the system and determine whether you need a repair, a new circuit, a panel replacement, or a complete service upgrade.
3. You have run out of breaker space
Are all the spaces in your electrical panel filled? Do you need new circuits but have nowhere to install the breakers?
This is common in older homes. Over time, homeowners may add a dishwasher, finished basement, air conditioning, workshop, heat pump, or other equipment. The panel can become crowded even when the home’s original electrical system was properly installed.
A full panel does not automatically mean you need 200-amp service. Sometimes a subpanel or panel replacement may provide the space you need. However, the existing service must still have enough capacity for the added loads.
A professional assessment can help identify the most practical option. Our service upgrade and panel team can discuss options such as adding a subpanel, replacing the panel, or upgrading the existing service.
4. You are adding an EV charger or mini-split
New electrical equipment can change your home’s power needs quickly.
A Level 2 EV charger commonly requires a dedicated 240-volt circuit. Downeast Electrical Services provides EV charger installation, including options for a standard Level 2 charger and a dedicated circuit with GFCI protection.
Mini-split heat pumps also require dedicated electrical circuits. They are an efficient way to heat and cool your home, but adding one or more systems increases the electrical load. You can learn more about our ductless mini-split services.
Before installing either system, your electrician should review:
Your main service rating
Existing electrical loads
The size and condition of your panel
Available breaker spaces
The proposed equipment
Future plans for additional equipment
Some homes can support a new EV charger or mini-split without a full service upgrade. Others may need more capacity. A load calculation provides the answer.
5. Your home has an older 100-amp panel
A 100-amp panel is not automatically unsafe or out of compliance. If the load calculation supports it and the equipment is in good condition, 100-amp service may still be adequate.
However, an older 100-amp panel may not provide the flexibility that many homeowners want today. It can be more difficult to add modern equipment, and older panels may have signs of wear, corrosion, overheating, or previous modifications.
You may be a good candidate for an upgrade if your 100-amp panel is:
Frequently overloaded
Warm to the touch
Rusty or damaged
Buzzing or making unusual sounds
Missing clear circuit labels
Full with no room for new circuits
Connected to outdated or damaged service equipment
Never open or work inside the panel yourself. If you notice a burning smell, smoke, visible melting, or significant heat, turn off equipment if it is safe to do so and contact a qualified electrician promptly.
6. You are planning a remodel
A remodel is an ideal time to review your electrical service. Adding a kitchen, bathroom, finished basement, workshop, bedroom, or home office can create new demand for lighting, receptacles, appliances, and heating or cooling equipment.
Planning ahead can help prevent expensive changes later. During the design stage, consider whether you will add:
An electric range or wall oven
A dishwasher or second refrigerator
A laundry area
A hot tub
Additional mini-splits
An EV charger
A workshop or detached structure
More lighting and receptacles
If your panel is already full, installing new circuits during a remodel may not be straightforward. A service upgrade may make the project smoother and give you room for future improvements.
Downeast Electrical Services can also help with electrical permitting, including submitting permits to local municipalities and providing the required documents.
Upgrading from 100 amps to 200 amps
A 200-amp service gives a home more capacity for modern electrical demand. It does not mean every circuit can use 200 amps, and it does not guarantee that every electrical problem will disappear. The work must still be designed correctly and installed to code.
A typical 100-amp to 200-amp upgrade may include:
A load calculation for existing and planned equipment
Utility coordination
A new 200-amp-rated meter socket, when required
New service entrance conductors
A 200-amp main disconnect and panel
Grounding and bonding updates
Circuit transfers and clear labeling
Required permits and inspections
The final scope depends on the home, the utility, the location of the existing equipment, and local requirements.
How the 2026 Maine electrical code affects service upgrades
Maine’s adopted Chapter 120 states that electrical installations beginning on or after July 1, 2026, must comply with the 2026 National Electrical Code, along with Maine requirements and applicable local ordinances.
This does not mean every home must automatically have 200-amp service. The required service size is based on the calculated electrical load. A 100-amp service may still be acceptable when it can safely support the home.
However, a new service upgrade or related electrical work may need to address current code requirements for the work being performed. Depending on the project, that can include updated grounding and bonding, GFCI or AFCI protection, equipment ratings, labeling, working clearances, and other requirements.
The exact requirements can vary by project and local authority having jurisdiction. That is why it is important to work with a licensed professional who can coordinate the work, permits, inspections, and utility requirements.
Start with a professional evaluation
If you live in Saco, Biddeford, Scarborough, Westbrook, Gorham, or Portland, our team can help you understand your home’s electrical capacity.
We will review the warning signs, inspect the existing equipment, discuss your plans, and explain whether you need:
A repair
Additional circuits
A subpanel
A panel replacement
A full service upgrade to 200 amps
You do not have to guess whether your home is ready for an EV charger, mini-split, remodel, or other major project. A proper evaluation can give you a clear and practical plan.
Contact Downeast Electrical Services at 207-352-3722 to discuss your electrical needs.
Key points to remember
Flickering lights, frequent breaker trips, limited breaker space, an older 100-amp panel, new high-demand equipment, and planned remodeling can all be reasons to consider a service upgrade.
A 200-amp upgrade is not automatically required for every home. A load calculation is the best way to determine whether your current service is sufficient. With the 2026 Maine code now applying to installations that begin on or after July 1, 2026, careful planning and professional guidance are more important than ever.
We are here to make the process clear, safe, and as hassle-free as possible. Stay tuned for more informative electrical tips from Downeast Electrical Services.
Frequently Asked Questions
Is a 100-amp electrical service unsafe?
Not necessarily. A 100-amp service can be safe when it is properly installed, in good condition, and large enough for the home’s calculated electrical load. An electrician should evaluate older or overloaded equipment.
Does adding an EV charger always require a 200-amp upgrade?
No. Some homes can support an EV charger with their existing service. A load calculation will show whether the service has enough capacity or whether an upgrade is needed.
Is a 200-amp service required under Maine’s 2026 code?
No. Maine’s 2026 requirements do not automatically require every home to have 200-amp service. The appropriate size depends on the calculated load and the requirements for the specific project.
What is the difference between a panel upgrade and a service upgrade?
A panel upgrade replaces or improves the electrical panel. A service upgrade may also include the meter socket, service conductors, main disconnect, and grounding system to increase the home’s total available capacity.
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