Your breakers keep tripping. The lights dim when the AC kicks on. And now you’re wondering if your electrical panel is the problem. Often, it is.
Most older homes run on 100-amp service, built for a time before central air, EV chargers, and electric everything. Today’s standard is 200 amps, and when your home outgrows its panel, it starts sending signals.
Here are the signs you need an electrical panel upgrade, what 100 amps versus 200 amps really means, and when it’s time to call a pro.
The Short Answer
A 200-amp panel is the modern standard. A 100-amp panel was built for a lighter era. You likely need an upgrade if your breakers trip often, your lights flicker, your panel is full or aging, or you’re adding an EV charger or big appliance. Some signs, like a burning smell or a warm panel, are fire hazards that need a same-day call.
100-Amp vs 200-Amp: What’s the Difference?
Amperage is your home’s power budget. It’s the total amount of electricity your panel can safely deliver at once.
A 100-amp panel was plenty decades ago, before homes had central AC, multiple TVs, and a car to charge. A 200-amp panel doubles that budget. Think of it as widening a single-lane road into a four-lane highway.
For most homes today, 200 amps is the practical standard, and moving up to it is the most common job I handle for electrical panel replacement in metro Atlanta. It handles your current load and leaves room to add circuits later without overloading the system.
Signs You Need an Electrical Panel Upgrade
Your home tells you when its panel is struggling. Watch for the signs mentioned below:
Breakers Trip Constantly
An occasional trip is normal. But if you’re regularly resetting a breaker, especially when running the microwave, hair dryer, or space heater, your circuits are overloaded. The panel is telling you it can’t keep up.
Lights Dim or Flicker
When your lights dim as the AC or refrigerator kicks on, that’s a voltage drop. The appliance is pulling a big surge of power and leaving little for the rest of the house. More than once a week is a yellow flag.
Your Panel Is Full
Open your panel and look for empty slots. If every space is used, there’s no room to add a circuit for new appliances or an EV charger without an upgrade or subpanel.
You Rely on Power Strips and Extension Cords
If you’re leaning on extension cords and power strips because you don’t have enough outlets, your home doesn’t have enough circuits for how you actually live. That’s also a fire risk on its own.
The Panel Is Old or a Problem Brand
Panels more than 25 to 30 years old are often undersized for modern life. Worse, if yours is a Federal Pacific or Zinsco panel, or an old fuse box, have it checked right away. These brands have documented safety issues where breakers can fail to trip.
You’re Adding an EV Charger or a Big Appliance
A Level 2 EV charger draws 40 to 50 amps, nearly half a 100-amp service. Add a heat pump, hot tub, or electric range, and an older panel simply can’t handle it. This is one of the most common reasons homeowners call me for an electrical panel upgrade in Dunwoody and nearby.
Urgent Signs: Call Right Away
Some signs go beyond inconvenience and point to an active fire risk. If you notice any of these, turn off the main breaker and call a licensed electrician the same day:
- A burning or melting plastic smell near the panel or outlets
- A panel cover that feels warm or hot to the touch
- Buzzing, crackling, or humming from the panel
- Scorch marks around the panel or any outlet
Repair, Upgrade, or Replace?
Not every problem means a full upgrade. Here’s the quick rule:
- Repair when it’s a single faulty breaker, a loose connection, or minor rust.
- Upgrade when your panel is sound but your home has outgrown its capacity, usually moving from 100 to 200 amps.
- Replace when the panel is outdated, overcrowded, or a recalled brand.
If you’re weighing the last two, it helps to understand the difference between an electrical panel upgrade vs replacement before you decide. Either way, a licensed electrician runs a load calculation rather than guessing, so the choice fits your home instead of a sales pitch.
Frequently Asked Questions
For a small home with modest needs, it can be. But if you have central AC, modern appliances, or plans for an EV charger, 100 amps is often too tight. A load calculation tells you for sure.
Open your panel and look at the main breaker, usually at the top. The number stamped on it, typically 60, 100, 150, or 200, is your service size. If it’s 100 or below, an assessment is worthwhile.
Most upgrades from 100 to 200 amps run about $1,500 to $3,500. The final price depends on your home, whether the meter and service cable need replacing, and local permit fees. An on-site look gives you an accurate number.
Most take half a day to a full day. Your power is off for part of that while the old panel comes out, the new one goes in, and grounding is brought up to code. An inspection follows to confirm it’s safe.
Not always, but often. If your 100-amp panel is already heavily loaded or full, you’ll likely need an upgrade first. If it has spare capacity and open slots, the charger may fit without one.
Yes. Buyers prefer homes with modern 200-amp service because it supports EV chargers, HVAC upgrades, and today’s appliances. It also signals the electrical system is safe and up to date.
Don’t Wait for a Warning Sign to Become a Hazard
A struggling panel rarely fixes itself. Left alone, small issues like tripping breakers and flickering lights can turn into overheating and real fire risk. Catching it early keeps your home safe and saves you money.
So if any of these signs sound familiar, get a real answer. We’ll check your service size, run a load calculation, and tell you plainly whether you need a repair, an upgrade, or nothing at all. Call Bray Electrical at 770-525-3979 for a free estimate.
