The short answer: a used EV with a State of Health (SOH) in the high-80s or above is a confident buy. Ask the seller for the SOH figure in writing, charge the car to 100% and compare the predicted range to its original WLTP figure, and check how much of the 8-year/160,000km battery warranty is left. Below 80% SOH, only buy at a heavily reduced price.
Shopping for a used EV? Search used vehicles across Ireland on Autoza → — every listing from a verified Irish dealer.
Why battery health is the real question when buying a used EV
Battery health — properly called State of Health, or SOH — is the single biggest anxiety blocking used-EV buyers in Ireland. It's a fair worry: unlike an engine, a battery pack degrades gradually every year it's in use, and a car with a badly worn battery loses real-world range even though it still drives, charges and passes every other check. The good news is that SOH is measurable, the checks are quick, and most EVs you'll actually find on the used market are nowhere near the point where it matters.
SOH is expressed as a percentage of the battery's original capacity. A brand-new EV starts at 100%. Typical real-world degradation runs at roughly 1.5–2.3% per year, though it varies by model, climate and how the car was charged and driven. That means a five-year-old EV commonly still retains somewhere in the mid-80s to around 90% of its original capacity — plenty for normal use.
What counts as good battery health in a used EV
As a rule of thumb for the Irish used market:
- High-80s % SOH or above — a confident buy, close to like-new range.
- Low-to-mid 80s % SOH — still a smart purchase if the price reflects the reduced range.
- Below 80% SOH — only buy at a heavily reduced price, or walk away.
These bands are guidance, not a hard test — how much SOH matters to you depends on your typical daily distance. A commuter doing 40km a day has far more headroom on a lower-SOH car than someone who regularly drives 300km in one trip.
How to check an EV's battery health before you buy
None of these checks require special tools, and most take a few minutes:
- Ask for the SOH figure in writing. Many dealers can pull this from the car's diagnostics or a recent service record. Get the number and the date it was measured.
- Charge to 100% and compare range. Charge the car fully and compare the predicted range shown on the dashboard to the car's original WLTP figure for that model and battery size. A big gap is a signal to dig further.
- Do a rapid-charge test if possible. A battery in poor health often charges more slowly on a DC rapid charger than a healthy one, and may throttle earlier.
- Check the model-specific health indicator. On a Nissan Leaf, the dashboard has a capacity bar with twelve segments — nine or more remaining is the manufacturer's own warranty threshold. Other manufacturers have their own equivalent readouts.
- Get an independent battery diagnostic if the SOH isn't available. A specialist EV garage or mobile diagnostic service can read the SOH directly from the car's battery management system, typically in under an hour.
- Check the first-registration date against the warranty. Battery warranties are tied to the car's original registration, not to ownership — see below.
Note: the NCT does not test battery health. Ireland's National Car Test checks roadworthiness items — brakes, lights, tyres, emissions equipment — but it doesn't measure an EV's SOH. A car with a full, clean NCT can still have a tired battery. Always check separately.
Battery warranty: what's covered and what to check
Most EV battery warranties run for 8 years or 160,000km, with a guaranteed capacity floor — commonly around 70% SOH. If the battery degrades below that floor within the warranty period, the manufacturer repairs or replaces it. Crucially, this warranty is tied to the vehicle, not the original owner, so it transfers automatically to you as a used buyer.
The one thing you need to check is the car's original registration date. An EV first registered in 2019 has roughly a year of battery warranty left by 2027; one registered in 2023 still has most of its cover. Ask the dealer for the exact first-registration date, not just the plate year, since a car can be built in one year and registered in the next.
What if the battery does need replacing?
Out-of-warranty replacements are genuinely rare — most owners never replace a pack, because the standard 8-year warranty covers the period when degradation risk is highest. If you do need a replacement outside warranty, indicative Irish estimates are:
| Model | Indicative replacement cost |
|---|---|
| Nissan Leaf | €4,000–€11,000 |
| Tesla Model 3 / Model Y | €8,000–€14,000 |
| Hyundai Ioniq 5 / Kia EV6 | €11,000–€15,000 |
| Premium / larger-pack models | Higher than the above |
Figures are indicative ranges and vary by specialist, pack size and whether a full pack or individual modules are replaced.
Looking further ahead, EU battery-passport rules (Regulation (EU) 2023/1542, with enforcement beginning February 2026) will require detailed battery health and composition data to be tracked and made available from 2027 onward — over time this should make checking a used EV's battery history even more straightforward than it is today.
Does the ICE2EV scrappage scheme help used-EV buyers?
Not directly. The ICE2EV scrappage scheme, which launches on 1 July 2026 and offers up to €8,500 (€5,000 scrappage plus the existing €3,500 SEAI grant), only applies to buying a brand-new battery electric vehicle. Used EVs are not eligible.
That's not necessarily bad news if a new EV is out of your budget even with the grant. Used electric cars already cost on average around €7,000 less than comparable diesels in Ireland, so a well-checked used EV remains the lower-cost route into electric ownership — and now you know exactly how to check the one thing that matters most before you buy.
Find your next electric car on Autoza
Once you know what to check, browsing with confidence is easy. Search used vehicles across Ireland on Autoza →, or go straight to our electric cars in Ireland hub and filter listings by electric fuel type.
Other tools worth using alongside this guide: get a free valuation if you're trading in a car, check the SEAI EV grant and run the numbers on the EV grants calculator, compare running costs against petrol or diesel, and always run a free NCT check before you view any car. If you're new to buying used in Ireland, our guide on how to buy a used car in Ireland and our piece on choosing the best used-car website are good starting points. For more on the scrappage scheme itself, see our EV grants and scrappage guide, and for budget picks, our roundup of the cheapest electric cars in Ireland.
