Most homeowners don't need 400-amp service — but knowing which size fits your home can save you thousands. Here's how to figure it out.
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Someone told you that you need a bigger panel. Maybe it was a contractor. Maybe it was a home inspector. Maybe your breakers have been tripping all summer and you’ve been Googling your way toward an answer that nobody seems to give you straight.
Here’s what most of the guides out there won’t tell you: the majority of homes in Alamance County don’t need 400-amp service. They need 200-amp — which is a very different project with a very different price tag.
This guide explains what separates the two, when 400-amp is genuinely the right call, and how to make sure you’re getting the upgrade your home actually needs — not the most expensive one on the menu.
A 200-amp service panel provides approximately 48,000 watts of capacity — roughly double what a 100-amp panel delivers. Since around 2015, it’s been the standard for new home construction, and for good reason. It can comfortably handle central air conditioning, electric water heaters, a dryer, a dishwasher, and most modern appliances running simultaneously without breaking a sweat.
For the vast majority of homes in Alamance County, 200-amp service is the correct answer. Burlington and Graham contain large concentrations of mid-century and mill-era housing — the kind of homes that were wired with 100-amp service back when central HVAC wasn’t even a given. If you’re in one of those neighborhoods and your panel hasn’t been upgraded, the conversation usually starts with getting to 200-amp, not jumping straight to 400.
This is probably the most common question we hear right now, and the answer is yes — in most cases, 200-amp service is more than sufficient to support a Level 2 EV charger alongside your existing home loads.
A Level 2 home charger draws roughly 40 to 60 amps on a dedicated 240-volt circuit. That’s a meaningful addition, but a 200-amp panel with available capacity can absorb it without issue. The problem isn’t usually the panel size — it’s that many older Alamance County homes are still on 100-amp service, which was already stretched thin before an EV charger entered the picture. If your home is running central HVAC, a water heater, and a dryer on 100-amp service, there may simply not be room to add a charging circuit safely. Upgrading to 200-amp solves that problem.
The eastern part of the county — particularly Mebane, where a lot of Triangle commuters have settled along the I-40 and I-85 corridors — has seen a noticeable uptick in EV charger requests. Those homeowners are often surprised to learn that the panel is the first conversation, not the charger itself. Once the service is properly sized, the charger installation is straightforward.
There’s also a practical rule worth knowing: under NEC continuous load requirements, a 200-amp service yields 160 amps of usable continuous capacity. That’s the real working number. For a home in the 1,500 to 2,500 square foot range with standard loads plus an EV charger, that headroom is typically more than adequate. A proper load calculation — not a guess based on square footage — will confirm it.
Adding a subpanel is not the same as upgrading your service. A subpanel gives you more breaker spaces, but it doesn’t increase the total ampacity coming into your home. If the main service is the bottleneck, a subpanel won’t fix it. That distinction matters when someone is quoting you options.
Panel installation costs in North Carolina typically run between $1,500 and $4,000, depending on the amperage, the complexity of the installation, and whether you’re upgrading service capacity or simply replacing an existing panel. A straightforward 200-amp panel replacement usually falls in the $2,000 to $3,000 range.
What pushes the cost toward the higher end? A few things. If the meter socket also needs to be replaced — which is common in older homes — that adds to the scope. If the panel is in a finished space and running new wire means working through closed walls, labor increases. And if the utility company needs to coordinate a service disconnect and reconnect, that introduces both scheduling and potential cost variables that are outside any electrician’s direct control.
Utility companies — whether that’s Duke Energy or Piedmont Electric Membership Corporation serving different parts of Alamance County — operate on their own timelines. Some can turn service around in days. Others have lead times that stretch weeks. That’s not the electrician dragging their feet; it’s the reality of how service upgrades work. We manage that coordination for you, but we can’t control the utility’s schedule.
What you should be able to control is the price you’re quoted before work begins. Flat-rate pricing means the number you agree to upfront is the number on the final invoice — no hourly billing that balloons once the job gets complicated, and no surprise charges after the walls are opened. That kind of pricing transparency matters a lot on a job in this cost range.
A panel upgrade in North Carolina requires a permit. That’s not optional, and any contractor who suggests otherwise is creating a legal and insurance problem for you. The permit process involves a rough-in inspection and a final inspection, and the utility won’t reconnect your service until the final inspection is passed. A properly executed upgrade passes both inspections the first time.
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Here’s the honest version: most homes don’t need 400-amp service. It’s not a better version of 200-amp — it’s a different category of installation for a different category of home.
400-amp service is typically warranted when a home exceeds 3,500 to 4,000 square feet and is running multiple high-demand systems at the same time — think two HVAC units, a pool, and multiple EV chargers all drawing simultaneously. It also makes sense for homes going fully electric, where gas appliances are being replaced with electric heating, cooking, and water heating all at once, or for properties integrating large solar and battery storage systems.
If your home doesn’t fit that description, 400-amp is likely more than you need.
A lot of homeowners picture 400-amp service as one enormous panel on the wall. In practice, the most common residential configuration is two side-by-side 200-amp panels fed from a single 400-amp meter base. It’s called a dual-panel configuration, and understanding that changes how you think about the space and cost involved.
The cost difference between a 200-amp and 400-amp upgrade is significant. While a 200-amp panel replacement in North Carolina typically runs $2,000 to $4,000, a full 400-amp service upgrade can reach $8,000 to $15,000 — and that range can stretch further if the upgrade requires a new utility transformer. Some utilities will require infrastructure changes on their end to deliver 400-amp service to a residential property, and that process can add months to the project timeline.
That’s not a reason to avoid 400-amp service if your home genuinely needs it. But it is a reason to make sure you actually need it before committing. The right starting point is a load calculation — a methodical accounting of your home’s actual electrical demand per NEC Article 220. That calculation tells you what size service your home requires based on real numbers, not assumptions. If the math supports 200-amp, that’s what we’ll recommend. If it supports 400-amp, we’ll tell you that too, and explain exactly why.
If a contractor is recommending 400-amp service for a 1,800 square foot home in Burlington with standard loads and one EV charger, that’s worth a second opinion. The load calculation is the document that either justifies or doesn’t justify the recommendation — and any licensed electrician should be willing to walk you through it.
Whether you’re looking at 200-amp or 400-amp, a few variables consistently move the needle on what you’ll pay — and knowing them upfront helps you evaluate any quote you receive.
Panel location matters. A panel in an accessible utility room or basement is faster and cheaper to work on than one tucked into a finished space where running new wire means cutting through walls. If the panel is in a difficult location, that’s a legitimate cost driver — not a contractor padding the bill.
Meter socket condition matters. In older Alamance County homes, particularly those built in the 1960s and 1970s, the meter socket may need to be replaced as part of the upgrade. That’s a separate component with its own labor and material cost.
Utility coordination matters. The utility company’s role in disconnecting and reconnecting your service is outside our control. Duke Energy and Piedmont Electric Membership Corporation both serve different parts of Alamance County, and their processes and timelines differ. We’ve done this work locally long enough to know what to expect from each utility — that local experience is worth something.
The scope of the existing wiring matters. If your home has aluminum branch circuit wiring — common in homes built before 1974 — that’s a separate conversation about remediation that may need to happen alongside or before a panel upgrade. It doesn’t necessarily derail the project, but it needs to be on the table.
Finally, the permit and inspection process adds a small cost but protects you significantly. A panel upgrade that’s been permitted and inspected is documented in the public record. That matters when you sell the home, when you file an insurance claim, and when you want to know with certainty that the work was done to current code. In North Carolina, that means the 2023 NEC, which has been in effect for permits issued since February 2024.
Get a flat-rate quote that covers everything — panel, permit, utility coordination, and any associated components — before any work begins. That’s the only number that matters.
Most homes in Burlington, Graham, Mebane, and the surrounding communities need 200-amp service — not 400-amp. The homes that genuinely warrant 400-amp are larger, running more high-demand systems simultaneously, and often going through a significant electrification project. For everyone else, 200-amp is the right answer, and getting there from an outdated 100-amp panel is a well-understood, manageable project.
The most important thing you can do before committing to either option is get a load calculation from a licensed electrician who will actually show you the math. That calculation tells you what your home needs — not what’s most profitable to install.
We’ve been doing this work in Alamance County since 2002. If you want a straight answer about your panel, call ESP Electrical Service Providers before you guess — we’ll tell you exactly what you need and exactly what it will cost before we touch anything.
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