Used EV sales Market Research in Chattanooga, Atlanta, and Columbus
By Niccolò Ferrari, Voltest
TL;DR: Used EV sales grew 23% around Chattanooga and North Atlanta and 27% around Columbus, Ohio this summer. EVs took a bigger share of used-car sales in both areas. As more used EVs reach your lot, a used EV batteries test report on each car is how you sort the good cars from the costly ones.
We have tested over 12,000 used EVs at dealerships and auctions [1]. For this analysis, we looked at used EV sales at every dealer within 100 miles of Chattanooga, TN and Dublin, OH from June 24 to September 21, 2026 [2]. Both areas point to the same job for dealers: get a used EV batteries test report on every car before you price it.
Key Takeaways
- Used EV sales grew in both areas this summer, and EVs gained share of used-car sales [2].
- The Columbus area grew fastest of the four areas we analyzed, at 27%.
- Most of the Chattanooga radius's used EV sales happen in the north Atlanta suburbs.
- Franchise stores are adding used EVs fast, including makes they do not sell new.
- In our data, EVs aged four to seven years showed battery problems about three times as often as newer EVs [1].
- Dealers with 10 or more used EVs can grow inventory and gross by buying on battery data, pricing to the battery, and adding a battery warranty in F&I.
How much did used EV sales grow around Chattanooga and Columbus?
Sales grew in both areas and held through September [2]. EVs also grew faster than the used market as a whole, so the gain was more than a busy summer for every used car.
| Area (100-mile radius) | Used EVs sold, Jun 24 to Jul 23 | Used EVs sold, Aug 23 to Sep 21 | Growth | EV share of used-car sales now | Median days to sell |
|---|---|---|---|---|---|
| Chattanooga and North Atlanta | 987 | 1,218 | +23% | About 1 in 35 (was 1 in 45) | 25 |
| Columbus area | 610 | 776 | +27% | About 1 in 53 (was 1 in 70) | 24 |
A car counts as sold when its VIN leaves dealer inventory and is no longer listed anywhere.
Why does the Chattanooga radius include North Atlanta?
A 100-mile circle around Chattanooga reaches into Georgia. Most of its used EV sales happen in the north Atlanta suburbs, including Kennesaw, Marietta and Roswell [2].
Inside Chattanooga itself, volume is much lower. The busiest local used EV dealer sold 40 cars in 90 days.
For a Chattanooga dealer, that split matters in two ways:
- Your inventory can come from the Atlanta side of the radius. More used EVs move through trades and auctions there.
- Your shoppers may come from there too. A shopper in Marietta will usually find your car online first, so the listing does the first part of the work.
Where did the Columbus-area growth come from?
The Columbus-area radius is measured from Dublin, Ohio, and includes Columbus, Dayton and the north Cincinnati suburbs. It was the only area we analyzed where sales rose every month this summer.
Dealers there took in 21% more used EVs over 90 days [2]. A Cadillac store, a Ford store and an independent dealer in Columbus grew their used EV intake the fastest.
More intake at franchise stores means more used EVs from makes those stores do not sell new. If your service department has no OEM tool for that make, an independent battery test is how you read the battery before you make an offer.
Can you judge a used EV battery by age or state of health?
Only partly. As used EV volume grows in Tennessee, Georgia and Ohio, more of the cars reaching your lot will be four to seven years old. In our data, those cars showed battery failure signals about three times as often as cars up to three years old [1].
| Vehicle age | Cars with a battery failure signal |
|---|---|
| Up to 1 year | About 1 in 420 |
| 2 to 3 years | About 1 in 330 |
| 4 to 5 years | About 1 in 120 |
| 6 to 7 years | About 1 in 100 |
| 8 to 10 years | About 1 in 330 |
| 11 years or more | About 1 in 32 |
Source: Voltest battery test data [1]. A failure signal means a cell voltage spread above 50 millivolts or a failed cell-balance check. The pattern is not a straight line, so read it as age bands.
State of health (SOH) is the battery's usable capacity today compared to new. It is the best single number for range and price, but it does not catch every problem. We found failure signals in 17 cars reading 95% to 100% SOH [1]. Our post on what an 80% pre-owned EV SoH score means covers how to read SOH for each model.
Used EV mileage works the same way. Two cars with the same model and mileage can have very different batteries, so let the test result set the offer.
What should a used EV batteries test report show?
A test report should give you, and your customer, the facts that set the car's value:
- State of health, compared to what is typical for that model, age and mileage.
- Estimated range for that car today.
- Cell voltage readings, which show whether one weak cell is holding the battery back.
- Charging history, where the car reports it.
- Remaining manufacturer battery warranty.
A Voltest report covers each of these and acts as a battery health certificate for that VIN. It arrives as a PDF, so your salesperson can pull it up with a customer. Our EV battery report guide walks through a sample.
The used EV battery score also belongs on the listing. Our customer in Raleigh, NC tests every incoming EV and puts the score on its website. Shoppers arrive having seen the score, and the sales team answers their questions with the report for that car [3].
How can dealers with 10 or more used EVs grow their inventory?
Once you carry 10 or more used EVs, every car you buy without battery data is a bigger risk to your inventory. Most dealers at auction still bid on year, mileage and the condition report. The battery is the one part none of those cover.
Bid on high-mileage EVs with healthy batteries. Many buyers pass on a used EV once the odometer looks high. In our data, about 41 of every 42 used EVs over 124,000 miles showed no battery failure signal [1]. A test on each car shows you which of those are good buys that other bidders are skipping.
Test on arrival, before recon. If a car shows a red light, open arbitration the same day with the report attached. Our customer in Charlotte, NC bought a used EV at auction that looked clean in the listing. Their test found a major cell imbalance before any recon money was spent, and they returned the car for a full refund [5].
Buy from the bigger side of your radius. Around Chattanooga, that means the north Atlanta auctions and trades. Around Columbus, it means Dayton and the Cincinnati suburbs. A test on arrival lets you buy further from home without guessing about the battery.
Take in off-brand EV trades. A franchise store often has no OEM tool for an EV from another make. A Voltest test reads the battery during the trade appraisal, so you can make an offer on the car instead of sending it to wholesale.
How can dealers improve gross on used EVs?
Battery data adds gross on the front end and the back end, and it cuts the losses you would otherwise take.
Front-end gross. Price each car against the battery benchmark for its model, age and mileage, as well as year and mileage. A car that tests above the benchmark has a reason to carry a higher price. Put the battery score on the SRP and VDP so shoppers see that reason before they call. When the score is visible, your salesperson spends less time defending the price.
Back-end gross. Voltest Protect is a battery warranty that only an EV deal can carry. It covers the high-voltage battery for the life of the vehicle, and dealers earn over $1,000 of margin on each unit sold [4]. The test you ran at intake is what qualifies the car, so there is no extra step. Flag eligibility on the deal jacket before the customer reaches the F&I office, and present it right after the customer has seen the battery report.
Avoided cost. One large independent in our network wholesales any EV that tests in the 70s for state of health instead of retailing it [5]. Every EV they retail has a known good battery, so they do not spend recon money or customer goodwill on a weak one. Set your own threshold before the cars arrive, so the decision is the same every time.
What does a 90-day used EV plan look like?
A dealer with 10 or more used EVs can put the full process in place in about three months. Each phase gives the next one the data it needs.
| Phase | What changes | Who owns it |
|---|---|---|
| Days 1 to 30: Testing | Every EV is tested at trade appraisal and on arrival from auction. Green, amber and red rules agreed in advance. One named tester and one backup. | Used car manager |
| Days 31 to 60: Listings and sales floor | Battery score live on SRP, VDP and window stickers. Sales team trained on EV shopper questions. | Marketing, sales manager |
| Days 61 to 90: Margin | Voltest Protect on the F&I menu. Buyers bid on high-mileage EVs that test well. | F&I manager, buyer |
Write down your starting numbers in week one, so you have something to compare against at day 90:
- Share of used EVs tested at intake
- Days to turn on used EVs
- Front-end gross per used EV
- Voltest Protect attach rate
- Units arbitrated or returned on battery findings
Start the website integration in week one. It runs through your website provider, so it usually takes the longest to set up.
What should dealers around Chattanooga and Columbus do next?
- Get an EV battery state of health report on every used EV before you make an offer. Test during the trade appraisal and on arrival from auction, before recon.
- Read the result against the benchmark for that model, age and mileage. A result that is normal for a high-mileage older car can be a red flag on a newer one.
- Apply the same rule every time. Green: retail it and show the score. Amber: price the range difference in and disclose it, or wholesale it. Red: no recon spend, and arbitrate or return it with the report.
- Put the used EV battery score on the listing and the window sticker.
- Offer a used EV battery warranty in F&I. Voltest Protect covers the high-voltage battery for the life of the vehicle. Any car with a Voltest SOH of 80% or higher qualifies [4].
Check the EV battery tester compatibility list against the makes coming through your trades and auctions, then talk to Voltest about testing your used EVs.
FAQ
How do I get an EV battery health report on a used EV?
Plug the Voltest device into the car's OBD port and run the test from your phone. The test takes about two minutes, and the report arrives by email as a PDF.
Is a battery health certificate the same as a test report?
A Voltest report works as a battery health certificate for that VIN. It records state of health, estimated range and cell voltage readings on the day of the test.
What is a used EV battery score?
It is the summary of the battery test that appears on your listing. Shoppers see state of health and estimated range before they call, with the full report one click deeper.
Is battery testing worth it for a dealer with 10 used EVs?
Yes. At that volume, each car you buy blind is real money at risk, and each car you test can carry a battery score on the listing and a battery warranty in F&I.
How much margin does a used EV battery warranty add?
Dealers earn over $1,000 of margin on each Voltest Protect unit sold [4].
Can I offer a used EV battery warranty?
Yes. Voltest Protect covers the high-voltage battery for the life of the vehicle. Any make or model with a Voltest state of health of 80% or higher qualifies, with no age or mileage limit [4].
Does high used EV mileage mean a bad battery?
Not on its own. Two cars with the same model and mileage can have very different batteries. Test each car and price on the result.
Sources
- Voltest proprietary battery test data, over 15,000 used EV tests, 2026.
- Voltest analysis of used EV dealer listing data, pulled September 22, 2026. Used battery-electric vehicles only, all dealers within 100 miles of each city, full 30-day periods from June 24 to September 21, 2026.
- Voltest Protect product details.
- Voltest customer onboarding guide and case studies, Charlotte, NC dealer and network practices.