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EV panel pre-check

Can Your Panel Handle an EV Charger?

Answer a few plain-English questions before you call an electrician. This gives a rough install-risk readout, a permit checklist, and a summary you can hand to a pro. It is a head start, not an approval.

Important: This is not a real electrical load calculation, code review, utility approval, or electrical advice. A licensed electrician must evaluate your actual panel, service, wiring, permits, and local requirements. Use only what you can see without opening the inner metal panel cover, and never touch wires, breakers, bus bars, or meter equipment.
Vehicle and charging goal

Start with what you know: the car and how you drive. This suggests a conservative planning setting an electrician can verify.

Suggested planning setting

Why start with vehicle and daily miles?

Homeowners usually know the car and how they drive, not circuit amperage. This section turns what you know into a conservative planning starting point an electrician can verify.

  • A lower setting can still add plenty of range overnight and reduces upgrade risk.
  • A higher setting helps with heavy driving, but it needs more panel capacity.
  • The final setting depends on the charger, vehicle, wiring, breaker, code, and panel review.
Panel and charger
Where to look for panel size

Electrical panels can be intimidating. That is normal. Open only the normal hinged panel door and look for the largest breaker marked MAIN, or a label that says 100A, 125A, 150A, or 200A. If the main breaker is not visible, it may be outside by the meter.

Do not remove the inner metal cover. If the number is not obvious, choose "I am not sure" and take photos instead.

Major electric loads

Check the big items you use or expect to add. This is only a risk screen, not demand-factor math.

How do I know which loads are electric?

Look for large double-pole breakers labeled range, dryer, AC, heat, water heater, pool, spa, or garage. If an appliance burns gas, propane, or oil, it may not be a large electric load, but the electrician can confirm.

Panel condition
What photos should I take?
  • Panel door open, showing all breaker labels.
  • Close-up of the largest main breaker or panel label.
  • Outdoor meter or main disconnect area.
  • Desired charger wall and the parking spot.
Charger location
Permit and approval
Install-risk readout
SCREEN
0 RISK / 100

Plain-English next steps

    Permit checklist

      Questions to ask the electrician

        Summary to hand your electrician

        Paste this into an email, intake form, or text message, along with your photos.

        How this readout is figured

        This is intentionally not a load calculation. It is a risk screen that weighs your main panel size, the requested charger output and its likely circuit, the pressure from major electric loads, panel condition and red flags, the routing to the charger, and permit uncertainty. The result tells you how much review is needed before quoting, not whether your home passes.

        Unknown or smaller panels, large charger circuits, many major loads, damaged or flagged panels, long or outdoor runs, and permit shortcuts all push the readout toward more review. If you had to guess on inputs, send photos so an electrician can confirm.

        Educational screening only. This tool cannot determine whether a panel can safely support a charger. Always hire a licensed electrician and follow current electrical code, utility rules, manufacturer instructions, permits, and inspections.

        Are you an electrician?

        This same tool can be branded for your business: your name, your service area, your permit and utility wording, and the homeowner summary routed straight to you as a qualified, photo-ready lead instead of a phone call your team has to field.

        Get this for your business

        How to check if your panel can handle an EV charger

        1. Note your main breaker size (often 100, 150, or 200 amps) and take clear photos of the panel and its label.
        2. Pick the charger you want and its amperage: most Level 2 units draw 16 to 48 amps at 240 volts.
        3. Run this pre-check for a plain-English risk readout and a summary of what an electrician will need to confirm.
        4. Hand the summary and photos to a licensed electrician, who runs a load calculation per NEC Article 220 and pulls the permit.

        Frequently asked questions

        Can a 100-amp panel handle an EV charger?

        Often, but it depends on a load calculation, not the panel size alone. A Level 2 charger adds a large continuous load, commonly a 40 to 60 amp circuit, and NEC Article 220 requires adding that to your home's existing calculated load to confirm the service has capacity. Many 100 amp homes can add a charger, sometimes at a reduced charging rate or with a load-management device; others need a service upgrade. A licensed electrician runs the calculation.

        What size breaker and wire does a Level 2 EV charger need?

        Most Level 2 chargers run on 240 volts and draw 16 to 48 amps. Because EV charging is a continuous load, the circuit is sized at 125 percent of the charger's rated current, so a 48 amp charger needs a 60 amp breaker and wiring rated to match. The charger's installation instructions and the electrician set the exact size.

        Do I need a permit to install an EV charger?

        Almost always. A hardwired charger or a new 240 volt circuit requires an electrical permit and inspection in most jurisdictions, and your utility may have its own EV or load-management rules. Skipping the permit can create insurance and resale problems. This pre-check includes a permit checklist to raise with your electrician.

        What does this pre-check actually tell me?

        It is a risk screen, not a load calculation. It weighs your panel size, the charger's likely circuit, other major loads, panel condition, the run to the charger, and permit uncertainty, then tells you how much electrician review to expect before you get a quote. It cannot decide whether your panel can safely support a charger: only a licensed electrician can.

        Will I need to upgrade my panel or service?

        Sometimes. If the load calculation shows the service is near capacity, options include a service upgrade, a subpanel, or a load-management device that limits charging when other large loads run, which often avoids a full upgrade. The right answer comes from the electrician's calculation for your home.

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