What this checker looks at
It compares your service size with the large electric loads that run alongside an EV charger, like electric heat, air conditioning, a range, a dryer or a hot tub. The more of those you have on a smaller service, the more a proper load calculation, a lower charger setting or load management matters.
It is deliberately simple and conservative. Square footage, nameplate ratings and code demand factors all change the real answer, so treat a "likely room" result as encouraging, not final. The full explanation is in our guide to whether your panel can handle an EV charger.
Your options if it is tight
- Load management: the charger slows down when the house is busy.
- A lower charger setting: 32 amps still refills most commutes overnight. Try the charging time calculator.
- A panel or service upgrade, when the calculation calls for it.
Panel capacity questions
Is this the same as a load calculation?
No. A load calculation follows the electrical code, using your home's square footage, every appliance's nameplate and specific demand factors. This checker is a rough screen that tells you whether to expect room, a tight fit, or a calculation that really matters.
Where do I find my service size?
Open the panel door. The largest breaker, usually at the top, is the main breaker, and its handle is labeled with the service size, commonly 100, 125, 150 or 200 amps. A photo of it answers the question quickly.
What if the result says tight?
Tight usually means options, not a panel upgrade. A lower charger setting or a load management device that slows charging when the house is busy can often make it fit. The real load calculation decides.
Want the real answer? A photo of your open panel lets us run the numbers.
Get an installation quote