So You Want a Home EV Charger: Here's Exactly What to Do

Getting a home EV charger installed in Knoxville takes about 9 steps, from evaluating your electrical panel to enrolling in KUB's Time of Use rate. Most homeowners can go from zero to charging in 2 to 3 weeks. The install itself is a half-day job. What takes time is scheduling a good electrician, the permit, and the inspection appointment. Here's the full sequence, with specifics on where Knox County permit jurisdiction matters and what older Knoxville homes typically run into.

Step 1: Decide Between Level 1 and Level 2

Level 1 is the cable that came with your car, plugged into a standard 120V outlet. It adds 3 to 5 miles of range per hour. For a short commute and the discipline to plug in every night, it's workable. For most people, it gets frustrating within the first month.

Level 2 uses a dedicated 240V circuit and adds 20 to 30 miles per hour. Most EVs are fully charged by morning regardless of when you plugged in. It's the right call for virtually every Knoxville homeowner with a garage.

Step 2: Check Your Electrical Panel

Find your main electrical panel (garage, basement, utility room, or exterior wall). Open the door and look at the main breaker at the top. The rating is the number there, either 100A or 200A, sometimes 150A.

200A service with open slots is usually fine. 100A panels are more common in older Knoxville neighborhoods, including parts of North Knoxville, South Knoxville, and homes near downtown built before the 1970s. If you're in that situation, you'll need a panel upgrade (typically $1,200 to $2,500) or a load management device that throttles the charger when other large appliances kick on. Your electrician assesses this on the quote visit, so you don't have to figure it out beforehand.

Step 3: Choose Your Charger

Four questions do most of the work:

• Tesla or non-Tesla? Teslas work with the Tesla Wall Connector or any J1772 charger. All other EVs need J1772.
• Hardwired or plug-in? A 14-50 outlet makes swapping chargers easier later. Hardwired is cleaner. Both are code-compliant.
• Smart (Wi-Fi) or basic? Smart chargers let you schedule overnight charging and track usage. Useful if you want to make the most of KUB's Time of Use rate.
• ENERGY STAR required? No, KUB doesn't require it. This gives you a wider selection than homeowners in cities where it's mandatory.

ChargePoint, JuiceBox, Emporia, and Wallbox all have solid options in the $300 to $700 range. Prices and availability change, so double check current specs before buying.

Step 4: Ask KUB About the Time of Use Rate

KUB's cash rebate for chargers is gone. What's still worth doing is calling KUB about their Time of Use rate for EV owners, a lower per-kWh price for charging overnight. It doesn't offset your install cost the way the old rebate did, but it saves you money for as long as you own the charger.

Call (865) 524-2911 or visit kub.org/ev before you buy your charger. Knowing your off-peak hours in advance can help you decide whether a smart, schedulable charger is worth the extra cost. See the full KUB TOU rate guide for the details.

Step 5: Get Quotes from Licensed Electricians

Contact at least two electricians licensed through the Tennessee Department of Commerce and Insurance (TDCI). Ask each one: Are you TDCI licensed? Will you pull the permit, and is the fee included in your quote? What does the quote actually cover?

A solid quote covers labor, materials, permit fee, and conduit. For a typical attached garage in Knoxville, expect $300 to $600 in labor. Hillier lots in West Knoxville and Farragut with longer conduit runs cost a bit more. See what to ask before hiring an installer for the full list of questions and red flags.

Step 6: Schedule Installation

Plan for a half-day block. Attached garage installs typically take 2 to 4 hours. The electrician needs access to your panel and garage for the whole visit. Tell them in advance where you park and where you want the charger on the wall.

If your panel is in a finished basement or an interior closet far from the garage, that adds conduit work and time. Panel upgrades push the job to a full day. Knoxville homes on steeper lots can have longer conduit runs than you'd expect on flat terrain, so mention your home's layout when getting quotes.

Step 7: Your Electrician Pulls the Permit

Tennessee requires an electrical permit for any new 240V circuit. If your home is in the City of Knoxville, the permit comes from the city. If you're in unincorporated Knox County (parts of Farragut, Powell, Halls, and rural areas), it comes from Knox County. Your electrician knows which applies to your address and files before any work begins.

The permit typically costs $50 to $150. Most licensed contractors include it in their quoted price. Without it, you can create problems with homeowner's insurance and future home sales. There's no good reason to skip it.

Step 8: Pass the Electrical Inspection

After the install, your electrician schedules an inspection. The inspector checks that the circuit is properly sized, wiring meets the National Electrical Code, GFCI protection is in place, and the charger is mounted correctly. The inspection itself takes 15 to 30 minutes. Getting on the schedule typically takes 2 to 5 business days.

Your electrician handles all of the scheduling. You need to be home during the appointment window. If something needs a minor correction, the electrician fixes it and requests a re-inspection.

Step 9: Enroll in KUB's Time of Use Rate

KUB is a TVA distributor, which means they have access to TVA's EV rate programs. Once your charger passes inspection, call (865) 524-2911 or visit kub.org/ev to enroll in the Time of Use rate for EV owners. Overnight charging during off-peak hours can lower your per-kWh cost meaningfully, especially if you're driving 30 or more miles a day.

The switch is usually simple to set up. Your smart charger's app lets you schedule overnight charging once you know which hours are off-peak. It takes about 10 minutes to configure.

Frequently Asked Questions