Panel check guide

Start by identifying the main service size

Before asking for a charger quote, find the main breaker or service rating if it is visible. Many homes show 100A, 125A, 150A, or 200A on the main breaker. Do not remove covers or open anything that should stay closed. A clear photo of the panel door, main breaker area, and breaker list is usually enough for a first conversation.

If you cannot read the service size, say that clearly. Guessing is less helpful than giving the installer a photo and asking them to confirm during the visit.

Note the large electrical loads

An EV charger is only one load in the home. The quote conversation changes when the house also has electric resistance heat, electric water heating, an electric range, a dryer, a heat pump, central air conditioning, a hot tub, sauna, workshop equipment, or future electrification plans.

Make a short list of the big loads you know about. If you are unsure, bring photos rather than trying to diagnose the system yourself.

Ask about load management before assuming panel work

Some homes need panel work. Some homes can use a smaller charger circuit. Some homes may use load management so the EV charger does not run at full output when other large loads are active.

The right answer depends on the home, local code requirements, the charger, and the installer design. The point of the panel checker is to help you ask earlier, not to decide the answer online.

Photos to collect

• the main panel with the door open, if it can be opened normally
• the main breaker or service rating label, if visible
• the breaker directory
• the area around the panel showing working space
• the parking spot and likely charger wall
• any finished walls, ceilings, or outdoor route between panel and charger

What not to do

Do not remove the dead front cover. Do not touch exposed electrical parts. Do not assume an unused breaker space means there is enough service capacity. Do not treat an online estimate as a load calculation, code review, or installation approval.

Useful installer questions

• Based on these photos, what would you need to confirm on site?
• Does my desired charger size make the panel conversation harder?
• Would a 32A circuit meet my driving needs?
• Would load management make sense here?
• Who confirms the permit and inspection requirements?