Understanding Electrical Panel Upgrades: What Grand Strand Homeowners Should Know
The electrical panel is the central nervous system of your home. Every circuit, every outlet, every light, every appliance ultimately traces back to it. When it works correctly, it is invisible — quietly managing the electrical load of your home without asking for attention. When it does not, the effects show up everywhere.
Panel upgrades are one of the most common electrical projects Greg Beverly Services performs for Grand Strand homeowners. The combination of older housing stock, the growing electrical demands of modern households, coastal environmental wear, and the frequency with which Grand Strand properties change hands or undergo renovation creates a high volume of legitimate panel upgrade needs across communities from Myrtle Beach to Pawleys Island.
This guide is a comprehensive overview of what a panel upgrade involves, who needs one, and what to expect from the process. If you are a Grand Strand homeowner who has been told you need a panel upgrade — or who suspects you might — this is the resource to start with.
What Is an Electrical Panel Upgrade?
An electrical panel upgrade is the replacement of your home’s existing electrical panel — including the breakers, bus bars, and in some cases the service entrance conductors — with a new panel that provides greater amperage capacity and meets current code requirements.
The most common upgrade path for Grand Strand residential properties is from 100-amp service to 200-amp service. Some older homes start at 60-amp service, which requires an even more significant upgrade. Larger properties or those with very high electrical demands may already be at 200 amps and need an upgrade to 400-amp service or the addition of a subpanel.
The panel itself is sometimes called a breaker box, load center, or service panel. All of these terms refer to the same component — the metal box, typically in a garage, utility room, or exterior of the home, that contains all of the circuit breakers and from which all circuits in the home originate.
Why Panel Upgrades Are Common on the Grand Strand
Aging Housing Stock
The Grand Strand has experienced enormous growth over the past several decades, but beneath the newer developments and commercial corridors, there is a large and significant base of residential properties built in the 1960s, 1970s, and 1980s. These homes were built to electrical standards of their era — and those standards are dramatically different from current requirements.
A home built in 1970 in Murrells Inlet, Garden City, or Surfside Beach likely has a 100-amp panel that has been in service for over 50 years. That panel was not designed for the electrical load of a modern household, and its components have been in continuous service under the stress of the coastal environment for half a century.
Increasing Household Electrical Demand
The average household’s electrical consumption has grown substantially over the past few decades. Central air conditioning — which was not universal in Grand Strand homes built before 1980 — is now standard. Modern kitchens have electric ranges, dishwashers, microwave ovens, and refrigerators with much greater electrical draw than their predecessors. Home offices, entertainment systems, smart home devices, EV chargers, and whole-house generators have all added to the load that residential electrical systems are expected to handle.
A 100-amp panel that was marginally adequate when it was installed is now chronically undersized for a household with modern expectations.
Coastal Environmental Stress
The Grand Strand’s salt air, high humidity, and regular storm activity create electrical wear that inland markets do not face at the same level. Panel components — the bus bars, breaker terminals, and connection points inside the panel — are exposed to corrosive conditions that degrade them over time. A panel that would remain serviceable for 40 years in a dry inland location may show meaningful degradation in 25 years on the coast.
When a panel inspection reveals corrosion on bus bars or breaker terminals, replacement is typically the appropriate response — cleaning corroded panel components is not a reliable long-term fix.
Home Sales and Renovations
Panel upgrades frequently surface during real estate transactions. Buyers’ home inspectors and lenders regularly identify undersized or aging panels and flag them as conditions that must be addressed. A seller who upgrades the panel before listing avoids this as a negotiating issue. A buyer who inherits an aging panel typically addresses it shortly after closing.
Major renovations also commonly trigger panel upgrades. Adding circuits for a kitchen renovation, a bathroom addition, or a new HVAC system requires panel capacity that many older Grand Strand homes do not currently have.
100 Amps vs. 150 Amps vs. 200 Amps: What Do These Numbers Mean?
The amperage rating of an electrical panel reflects the maximum current it can safely receive from the utility and distribute throughout the home.
60-Amp Service
A 60-amp panel is the rarest configuration still found in service today. This is the original standard from the early days of residential electrification, and it is entirely inadequate for modern use. A home with 60-amp service essentially cannot support central air conditioning alongside normal household loads. If a Grand Strand property has 60-amp service, upgrading is urgent from both a safety and functionality standpoint.
100-Amp Service
100-amp service was the residential standard from roughly the 1960s through the 1980s and remains the most common configuration in older Grand Strand homes. It is sufficient for smaller homes with limited electrical loads, but most households with central air conditioning, an electric range, and normal modern appliance usage are running close to capacity on a 100-amp service. Adding an EV charger, generator transfer switch, hot tub, or additional circuits to a 100-amp panel is frequently not possible without an upgrade.
150-Amp Service
150-amp service is an intermediate option that provides meaningful improvement over 100 amps but is not the standard for new residential construction or major upgrades. It may be appropriate for smaller homes or properties where 200-amp service is constrained by utility service limitations, but in most cases a 200-amp upgrade is the recommended approach.
200-Amp Service
200-amp service is the current residential standard and what most electricians recommend for panel upgrades. A 200-amp panel provides sufficient capacity for central air conditioning, a full modern kitchen, home office equipment, EV chargers, generators, and the full range of modern household electrical demands. It also provides room for future circuits without requiring another upgrade.
For most Grand Strand homeowners considering a panel upgrade, 200-amp service is the right destination.
400-Amp Service and Subpanels
Large homes, properties with multiple high-draw systems running simultaneously, or properties with accessory dwelling units may benefit from 400-amp service or the addition of a subpanel that extends capacity to a specific area of the home or property — a detached garage, workshop, or pool house, for example. Greg Beverly Services assesses each property’s specific situation and recommends the appropriate solution.
The Panel Upgrade Process: Step by Step
Step 1: Assessment
We assess your existing panel, service entrance, and household load to determine the appropriate upgrade scope. This includes identifying any additional issues — service entrance conductors, meter base condition, grounding electrode system — that need to be addressed as part of the project.
Step 2: Scope and Estimate
Based on the assessment, we provide a detailed written estimate covering all work to be performed. For a standard 100-to-200-amp upgrade on a typical Grand Strand residential property, the scope typically includes the new panel, installation labor, permit fees, and any required updates to the service entrance or grounding system.
Step 3: Permitting
Panel upgrades require an electrical permit in South Carolina. We prepare and submit all permit applications on your behalf. The permit ensures the work is inspected and legally documented — an important protection for you as the homeowner.
Step 4: Utility Coordination
The utility company must temporarily disconnect service to your home to allow safe removal of the old panel. We coordinate this disconnect and reconnect as part of the project. The disconnect is typically scheduled in advance and planned to minimize inconvenience.
Step 5: Panel Removal and Installation
With service disconnected, the old panel is removed. The new panel is installed, connected to the service entrance, and all existing circuits are reconnected. New breakers are installed for each circuit, and any new circuits being added as part of the project are roughed in at this stage.
Step 6: Grounding and Bonding
The grounding electrode system — the ground rods and bonding conductors that connect the electrical system to earth ground — is inspected and updated if needed. Current code requirements for grounding are more stringent than older standards, and bringing the grounding system up to current requirements is part of a complete panel upgrade.
Step 7: Inspection
The local authority having jurisdiction inspects the completed installation to confirm code compliance. We coordinate the inspection schedule and are present for the inspection.
Step 8: Utility Reconnect and Testing
Once the inspection is passed, the utility reconnects service and we perform final testing of all circuits to confirm everything is operational.
How Long Does a Panel Upgrade Take?
A standard residential panel upgrade on the Grand Strand — from a 100-amp to 200-amp service on a typical single-family home without unusual complications — typically takes one full day. The utility disconnect and reconnect add some scheduling coordination, but most of the work is completed in a single visit.
Projects with additional scope — service entrance replacement, subpanel installation, adding new circuits — take longer. We provide a realistic timeline estimate as part of the project planning process.
Serving Grand Strand Communities
Greg Beverly Services performs panel upgrades for homeowners throughout the Grand Strand. Whether you are in Myrtle Beach, North Myrtle Beach, Murrells Inlet, Surfside Beach, Garden City, Pawleys Island, Litchfield Beach, Georgetown, or any of the surrounding communities, we bring the same licensed expertise and 40-year track record to your project. View all service areas or browse our past projects to see the scope of our Grand Strand work.
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Murrells Inlet | Surfside Beach | Garden City
Frequently Asked Questions
How do I know if I need a panel upgrade? Common indicators include frequently tripping breakers, flickering lights when large appliances run, an older 100-amp panel, no available breaker slots for new circuits, visible corrosion inside the panel, or a panel that has been flagged by a home inspector or insurance company. If you are uncertain, a professional inspection gives you an accurate assessment.
Is a 200-amp panel enough for my Grand Strand home? For most residential properties, yes. 200 amps is sufficient for central air conditioning, modern appliances, EV chargers, and typical household loads. For larger homes or those with unusually high demands, we assess whether 200 amps is sufficient or whether additional capacity is warranted.
Does a panel upgrade require a permit in South Carolina? Yes. Electrical panel upgrades require a permit in South Carolina. Greg Beverly Services handles all permitting on your behalf. The inspection that follows the permit ensures the work meets current code — which is a protection for you as the homeowner.
How much does a panel upgrade cost on the Grand Strand? Costs vary based on the current panel size, the target amperage, service entrance condition, the specific property, and any additional work required. We provide detailed written estimates after assessing your property. Contact us to schedule an assessment and get an accurate picture of what your project will involve.
Will I lose power during the panel upgrade? Yes, temporarily. Service must be disconnected while the panel is replaced. We coordinate the disconnect and reconnect with the utility company to minimize the duration of the outage. Most residential upgrades can be completed in a single day.
Can a panel upgrade increase my home’s value? Yes. Updated electrical infrastructure is a value-positive improvement that makes a home more attractive to buyers, easier to insure, and more functional for current owners. A home with a modern 200-amp panel is more marketable than one with an aging 100-amp system, particularly to buyers who intend to add EV chargers, generators, or other modern systems.
What is the lifespan of a modern electrical panel? A quality electrical panel in a properly maintained installation can last 25-40 years or longer. Coastal installations may see shorter effective lifespans due to the corrosive effects of salt air on internal components. Regular inspections help identify when components are approaching end of useful life before they become safety issues.
Do I need to be home during the panel upgrade? It is helpful for you to be home at the start of the project for access and to address any questions, and to be present for the final walkthrough. The details depend on your specific situation and we can discuss what makes sense for your project.
If you are a Grand Strand homeowner with questions about your electrical panel — whether you are seeing warning signs, planning a renovation, or simply want a professional assessment — contact Greg Beverly Services.
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