Is My Electrical Panel Full, and What Are My Options?
by the Berry team · Updated
A panel with no empty slots is not automatically a problem, but it means adding a new circuit, like for an EV charger, heat pump, or kitchen remodel, needs a solution: tandem breakers if your panel allows them, a subpanel, or a panel upgrade. Which one fits depends on whether you are out of space or out of capacity, and an electrician can tell you with a load calculation.
Options and what they cost
Ranges are typical US prices with a licensed electrician, including permits in many areas. Utility work, long wire runs, and older homes can raise them.
| Option | When it fits | DIY cost | Pro cost |
|---|---|---|---|
| Tandem breakers | The panel is out of slots but rated to accept tandem breakers in some positions, and has spare capacity. | DIYNot a DIY job | Pro$150-$400 |
| Consolidate or remove unused circuits | Breakers serve circuits that no longer exist, or loads can be combined safely. | DIYNot a DIY job | Pro$150-$400 |
| Subpanel | Out of space but not out of capacity. Common for garages, additions, and basements. | DIYNot a DIY job | Pro$800-$2,500 |
| Panel replacement, same service size | The panel is old, damaged, recalled, or a brand electricians commonly recommend replacing. | DIYNot a DIY job | Pro$1,500-$3,500 |
| Service upgrade, often to 200 amps | Out of capacity for new loads like EV charging, heat pumps, or electric appliances. | DIYNot a DIY job | Pro$2,500-$6,000+, more if the utility service line must change |
| Load management device | Adds an EV charger or appliance without a service upgrade by sharing capacity with other loads. | DIYNot a DIY job | Pro$500-$1,500 |
Ranges are typical US prices and vary with your region, your home, and the season. A pro quote for your exact job beats any range.
Out of space or out of capacity?
These are different problems. Out of space means there are no physical slots left for breakers. Out of capacity means the total electrical load of the house is approaching what the service, often 100, 150, or 200 amps, can supply. A full panel on a 200 amp service may only need a subpanel. A half-empty panel on a 100 amp service may not have room for an EV charger and a heat pump. The service size is usually printed on the main breaker at the top of the panel.
Signs the panel needs attention
- No open slots, and you are planning a new circuit.
- Breakers trip often because too much is on too few circuits. See why a breaker keeps tripping.
- Two wires under one breaker screw, called a double tap, on breakers not designed for it. Home inspectors flag this often.
- Rust, scorch marks, a burning smell, buzzing, or a panel that feels warm.
- A fuse box, or a panel brand that electricians and inspectors commonly flag, such as Federal Pacific Stab-Lok or Zinsco panels.
- Lights dim sharply when large appliances start. See why lights flicker.
Planning for EV chargers and heat pumps
EV chargers, heat pumps, induction ranges, and electric water heaters are the most common reasons people outgrow a panel. Before you buy, ask an electrician for a load calculation, which estimates your home's real demand against the service size. Sometimes there is enough capacity. Sometimes a smaller charger, a load management device, or a heat pump with a lower electrical requirement avoids a full service upgrade. If you are weighing heating systems, see heat pump vs furnace costs.
What a panel upgrade involves
A service upgrade usually requires a permit, coordination with your utility to disconnect and reconnect power, and an inspection. Power is typically off for several hours to a day. The meter base, service entrance cable, and grounding may need upgrading too. New or replaced services often require a whole-house surge protector under current code. See whole-house surge protection.
When to call a pro
- You want to add a circuit and there are no open slots.
- You are planning an EV charger, heat pump, electric range, hot tub, or addition.
- The panel is warm, buzzing, rusty, scorched, or smells like burning.
- You have a fuse box or a panel brand that inspectors commonly flag.
- A home inspection noted double taps or other panel issues.
What makes it worse if you wait
- Overloaded circuits and workarounds like extension cords raise fire risk.
- Panel problems found during a home sale can delay closing or lower the price.
- Waiting until you buy an EV or heat pump can mean weeks of delay while a service upgrade is permitted and scheduled.
- Corrosion or loose connections in a panel get worse over time and can damage breakers and bus bars.
Common questions
What do I do if my electrical panel is full?
Have an electrician check whether the panel accepts tandem breakers, whether unused circuits can be removed, or whether a subpanel makes sense. If the house is out of capacity, not just space, a service upgrade or a load management device may be needed.
How much does it cost to upgrade an electrical panel?
Replacing a panel at the same service size often costs about $1,500-$3,500. Upgrading service, often to 200 amps, commonly runs $2,500-$6,000 or more, depending on the utility, the meter, and how far the panel is from the service.
Is a subpanel cheaper than a panel upgrade?
Usually, if the existing service has enough capacity. A subpanel often costs $800-$2,500 and adds space for more circuits, but it does not add capacity. If the home is near its total load limit, a subpanel will not solve that.
Can I add an EV charger without upgrading my panel?
Often. A load calculation may show enough capacity, a lower-amperage charger may be enough for daily driving, or a load management device can share capacity with other appliances. An electrician can tell you which applies.
Not sure that's your problem? Snap a photo and Berry will tell you what it is and what it should cost.
Keep reading
- Why Does My Breaker Keep Tripping?Why a circuit breaker keeps tripping, how to tell an overload from a short or ground fault, what you can safely check, and what electrician repairs cost.
- Is a Whole-House Surge Protector Worth It?What a whole-house surge protector does, what it does not protect against, how it works with power strips, and what installation typically costs.
- Is Aluminum Wiring Dangerous in an Older Home?Why aluminum branch wiring in homes from roughly 1965 to 1973 is a concern, how to tell if you have it, the approved repair methods, and what they cost.
- Home Electrical Maintenance: What to Do, How Often, and What It CostsThe full electrical guide hub.