5 mistakes when buying a used electric car (and how to avoid them)

The used electric car market is growing fast in Bulgaria. But an EV isn't an ordinary used car — it has quirks that an inexperienced buyer can pay dearly for. Here are the five mistakes we see most often.

Mistake 1: Not checking battery health (SOH)

The battery is the heart of the electric car and the only component whose lifespan degrades in a predictable way. Degradation is normal — an average of 2–3% per year under normal use. But with abuse (frequent fast charging, long storage at 100%, hot climates), degradation can reach 15–25% over 5 years.

SOH (State of Health) shows how much of the original capacity remains. 85% SOH on a 5-year-old car is excellent. 70% is a warning sign.

How to check it:

• Ask for an OBD diagnostic — specialized tools (Scan My Tesla, Car Scanner, OBD2) display SOH
• For Tesla — check the Service > Battery > Capacity menu
• For VW ID models — request an official Battery Check from a dealer
• For Renault and Nissan — official dealers have a diagnostic tool

Never buy without an SOH check. If the seller refuses, that's a reason for concern.

Mistake 2: Ignoring the charging history

It's not just about the current capacity — how the battery has been charged matters just as much. Two cars with 80% SOH can be in very different states of health.

Red flags in the charging history:

• Over 80% of charges are fast DC (instead of slow AC) — this accelerates degradation
• Regularly charging to 100% and leaving it there for days at a time
• Long periods with the battery below 10% or above 95%

How to check it: For Tesla, charging history is available in the account. For other brands, request data from an OBD diagnostic or an official service center. Check how many charge cycles the battery has been through.

Mistake 3: Not checking the warranty status

Most manufacturers offer an 8-year / 160,000 km battery warranty. If you're buying a 4-year-old car with 80,000 km on it, you still have 4 years of warranty left — that's valuable.

The trap: the warranty can be voided by:

• An unregistered ownership transfer (for some brands the warranty only applies to the first owner)
• Unauthorized interference with the battery
• Previous damage/accident repaired outside an official service center

Check: Contact the official dealer/service center directly and provide the VIN. Get written confirmation of the active warranty status.

Mistake 4: Buying based on WLTP without a real test

The WLTP range is a marketing number — the real-world range under average Bulgarian conditions is 75–85% of WLTP in summer and 60–70% in winter. With an older battery at 80% SOH, discount it further still.

Example: A Nissan Leaf 40 kWh with a rated WLTP of 270 km and 78% SOH:

• Real capacity: ~31 kWh
• In winter (-5°C), highway driving at 100 km/h: around 140–160 km real-world range

Before buying: 1. Test drive under conditions similar to your actual usage 2. Calculate your specific route with ABRP 3. In winter, test at a lower temperature or ask an owner of the same model

Mistake 5: Not checking the charging standard and power

Two Nissan Leafs — one with a 6.6 kW AC charger, the other with a 50 kW DC CHAdeMO port — can offer a completely different charging experience. When buying an older EV:

Check:

• AC charging power: 3.7 kW (slow, 8+ hours for a full charge), 7.4 kW (standard), 11 kW (good), 22 kW (excellent)
• DC charging power: Does it have DC at all? 50 kW is the minimum for comfort. Older base-model Nissan Leafs don't offer a DC option
• CHAdeMO vs CCS2: Check which connector — CHAdeMO is being phased out in Bulgaria

Specifically for an old Nissan Leaf: Many early Leafs only have 3.3 kW AC and CHAdeMO. As Bulgaria's network migrates to CCS2, such a car will only be able to charge at a shrinking number of stations.

Bonus: Documents required at purchase

Besides the technical checks, don't forget:

• Full service history — including OTA updates for Tesla
• Traffic police record for registration, accident, and lien history
• Carfax/AutoDNA if the car was imported from abroad
• Insurance history — previous damage claims
• Battery serial numbers — do they match the documents?

For cars imported from Germany or the Netherlands — these markets tend to have very well-documented histories. A German EV with a complete history is a better buy than one with an unclear past.

Conclusion

A used EV can be an excellent purchase — or an expensive mistake. The difference lies in the checks. SOH, charging history, warranty status, and charging standards are the four pillars every purchase should revolve around. Spend the equivalent of a professional OBD diagnostic — it can save you thousands.

Browse used electric car listings on FindVolta — look for listings with disclosed SOH and a full history.