Questions to Ask an EV Charger Installer

Licensing and insurance

Permit and inspection

Panel capacity

Charger compatibility

Quote details

Warranty and follow-up

Red flags to watch for

• No license number or insurance documents
• "We don't need a permit for this"
• Verbal-only quote
• Demands full payment upfront
• No load calculation before quoting panel work
• Wire or breaker undersized for the charger amperage
• No written labor warranty

How to use this list

Send the questions in an email or use them on the phone during the initial quote. Most reputable installers will answer them quickly and confidently. Vague or evasive answers are a sign to keep shopping. Collect at least two written quotes and compare line items, not just totals.

Copy-paste email script for first contact

Send this exact message to two or three local electricians. The structure forces a comparable, itemized reply instead of a vague "around $1,500" text.

Subject: Quote request — Level 2 EV charger install

Hi, I'm looking for a written quote to install a [charger model, e.g. Tesla Wall Connector / ChargePoint Home Flex] at my home in [city, ZIP].

Site details:
- Panel: [100A / 150A / 200A], located in [garage / basement / outside wall]
- Approx. wire run: [distance in feet], [indoor / outdoor / through finished wall]
- Charger amperage target: [32A / 40A / 48A]
- Mounting: [attached garage wall / outdoor pedestal / carport]

Please include in the written quote:
1. Wire gauge and breaker size
2. Conduit type (if any)
3. Permit fee and who pulls it
4. Inspection coordination
5. Labor warranty term
6. Total fixed price (or itemized T&M with a not-to-exceed cap)

If a load calculation or panel upgrade is needed, please quote that as a separate line item rather than rolling it into the base price. Thanks!

Phone screening script (under 4 minutes)

1. "Are you a licensed electrician in [state]? Can I get your license number?"
2. "How many Level 2 EV chargers have you installed in the last 12 months?"
3. "Do you pull the permit and meet the inspector, or is that on me?"
4. "For a [40A] charger on a [200A] panel with a [25 ft] indoor run, what's a ballpark before the site visit?"
5. "What's your labor warranty, and is it in writing?"
6. "If the load calc shows I need a panel upgrade, do you quote that separately?"

A qualified installer answers all six in a confident, specific way. Hedging on licensing, permits, or warranty is the cue to thank them and move on.

Side-by-side quote comparison worksheet

Once two or three written quotes arrive, drop them into this table. Pricing shown is a 2026 U.S. mid-market reference for a clean 40A install on a 200A panel with a 25 ft indoor run — your numbers will shift with metro labor rates and site conditions.

Regional pricing notes

Labor and permit fees shift meaningfully by metro area. Use these reference points when a quote feels high or low:

NEC code references to mention

Dropping the right NEC sections in a phone call quickly signals you've done your homework and tends to filter out installers who do mostly residential remodels but little EV work.

• NEC 625 — Electric Vehicle Power Transfer System. The core article for EVSE installs.
• NEC 625.42 — Continuous-load rule. EV circuits must be sized at 125% of the charger's rated load (a 40A charger needs a 50A circuit).
• NEC 220.87 — Load calculation using maximum demand data, often used to avoid a full panel upgrade.
• NEC 210.8(F) — GFCI protection requirements for outdoor outlets feeding EV chargers.
• NEC 625.43 — Disconnecting means for chargers rated over 60 amps or more than 150 volts to ground.

Code citations are based on NEC 2023; your AHJ may still be enforcing NEC 2020 or 2017. Confirm with your installer or local building department.

Tax credits and rebate questions worth asking

• "Does my address qualify for the federal 30C Alternative Fuel Vehicle Refueling Property Credit (up to 30%, capped at $1,000)?"
• "Are there active utility rebates in my area I should know about?" (Most installers know the local ones by heart.)
• "Will you itemize the install on the invoice so I can claim the tax credit?"
• "Do I need to use a particular charger model to qualify for my utility's rebate?"
• "Will you submit the rebate paperwork on my behalf, or is that my job?"

What a good written quote actually looks like

A trustworthy quote is one page, plain English, and has these elements: licensed contractor name with license number, scope of work in 4-8 lines, itemized materials (wire gauge, breaker, conduit, mounting), permit and inspection line, fixed price or T&N cap, payment terms (typically 10-25% deposit, balance on completion and passed inspection), labor warranty term, and an expiration date for the quote (usually 14-30 days). If any of these are missing, ask for a revised version before you sign.

Last updated

This guide was last reviewed and expanded in June 2026 with the 2026 quote comparison worksheet, NEC 2023 references, regional labor rate notes, copy-paste phone and email scripts, and updated tax-credit guidance. We refresh this page when NEC editions, federal credits, or major utility rebate programs change.