Signs Your Home Has Outgrown Its Service
A panel upgrade isn’t about age — it’s about math. Your electrical service has a fixed capacity, and every new load draws from the same pool. You may be due for an upgrade if:
- The main breaker trips when several appliances run at once (different from a single branch breaker tripping).
- You’re adding an EV charger, hot tub, electric range, or tankless water heater and there isn’t room in the load calculation.
- A home addition or renovation is expanding the square footage the panel must serve.
- The panel is full — every slot taken, with no safe way to add the circuits your project needs.
- Your home still runs on 100-amp service while your lifestyle needs what a modern 200-amp service delivers.
It Starts with a Load Calculation
Before we recommend anything, we perform a formal load calculation following NEC Article 220 — adding up the general lighting and receptacle loads, fixed appliances, HVAC, and the new loads you’re planning. That calculation tells us, objectively, whether your existing service can carry the plan or whether a capacity increase is required. It also determines the right service size, so you pay for the capacity you actually need — not a guess in either direction.
What a Panel Upgrade Involves
Raising service capacity is a bigger job than swapping a panel box. A typical upgrade includes:
Utility coordination
We coordinate with Florida Power & Light on the service disconnect and reconnection, because the power company’s feed is cut during the work.
Meter socket & service mast
Higher amperage usually means a new meter socket, heavier service conductors, and often mast or riser work sized for the larger service.
New higher-capacity panel
A new panel with the amperage and breaker spaces your load calculation calls for — commonly 200 amps with room to grow.
Grounding & bonding
The grounding electrode system is brought up to current code requirements for the new service size.
Permits & inspection
Service upgrades are permitted work. We pull the permit, schedule the inspection, and don’t call the job done until it passes.
Whole-home labeling
Every circuit is identified and labeled in the new panel, so you know exactly what controls what.
Treasure Coast Considerations
Many Port St. Lucie homes were built when 100-amp service was standard and air conditioning loads were smaller. As owners add EV chargers, pool equipment, and larger HVAC systems, those original services run out of headroom. We see this constantly in neighborhoods built from the 1970s through the 1990s — solid homes whose electrical service simply predates modern loads. Service areas: Port St. Lucie, Fort Pierce, Stuart, Jensen Beach, and Palm City.
The Upgrade Process, From First Call to Final Inspection
1. Tell us what's driving the upgrade
Most upgrade calls start with something new — an EV charger, a home addition, a larger AC system — or breakers that trip under loads the panel was never sized for. Tell us what's changing in your home and we'll schedule an on-site assessment.
2. Load calculation and a written estimate
We measure your home's actual electrical demand and how much headroom you need, then give you a free written estimate for the right service size. If a smaller fix would solve your problem, we'll tell you that instead of selling you capacity you don't need.
3. Permit, utility coordination, and one planned power-off window
We pull the permit and coordinate the meter and service work with the utility so the day your power is off is planned, not a surprise. Most upgrades are completed within that single scheduled window, and we'll tell you in advance how long to expect.
4. Installation, testing, and inspection sign-off
The new panel and service equipment go in, every circuit is reconnected, labeled, and tested under load, and the work is closed out with the city inspection. Before we leave, we show you your new panel layout so you know exactly which breaker controls what.
Request an Upgrade Estimate
Tell us what you’re adding — EV charger, addition, new appliances — and we’ll run the numbers with you.
Panel Upgrade FAQs
What’s the difference between a panel upgrade and a panel replacement?
An upgrade increases your electrical capacity — for example, 100 amps to 200 amps — to support new loads like EV chargers or additions. A replacement swaps an aging or damaged panel for a new one at the same amperage. If your panel is fine but your loads have grown, you need an upgrade.
How do I know if I need 200 amps?
A load calculation (NEC Article 220) gives the answer. We total your existing and planned loads and compare against your current service size. Many modern households with an EV charger and electric appliances land at or near 200 amps.
Can I add an EV charger without upgrading my panel?
Sometimes — if the load calculation shows spare capacity and there’s breaker space, a dedicated charger circuit may be all you need. If not, an upgrade is the safe path. We’ll tell you which one your home qualifies for.
Will my power be off during the upgrade?
Yes, for part of the day. The utility disconnects the service while we change the meter socket, conductors, and panel, then reconnects once the work is ready. Most upgrades are completed in a single day, and we schedule around your needs.
Does a panel upgrade require a permit?
Yes. Changing service capacity is permitted work in St. Lucie County and surrounding jurisdictions. We handle the permit application and the final inspection.
Do you coordinate with Florida Power & Light?
Yes. The utility must disconnect and reconnect the service feed for this kind of work, and we schedule that coordination as part of the project.
Should I add a subpanel instead of upgrading?
A subpanel adds breaker space but not capacity — it doesn’t raise the total amperage your service can deliver. If the issue is running out of slots, a subpanel may help. If the issue is total load, you need a service upgrade.
How much does a panel upgrade cost?
Every home’s service is different — mast condition, meter location, grounding, and the amperage jump all affect the scope. We provide a written estimate after evaluating your existing service, so you know the full picture before committing.