The 90,000 km electric-car cliff: why your bargain battery may already be dying
The sticker price looks irresistible, but one digit on the odometer can vaporize range overnight. After 90,000 kilometres, an electric-vehicle battery sheds more than three times as much capacity as it did during its entire youth, according to a 50,000-car study released this week by German inspection authority TÜV Nord and vehicle-diagnostics firm Carly.
Lo que nadie cuenta es que the degradation curve is not a gentle slope—it’s a hidden step function. Until the odometer rolls past that threshold, the average pack loses only 0.7 State-of-Health points per 10,000 km, a decline drivers will never feel. Beyond it, the pace leaps to 2.3 points. A 120,000-km hatchback that still advertises “90% range” can quietly deliver 15% less, leaving commuters stranded in winter traffic.
Old myths die at the service bay
Industry lore held that early lithium-ion packs were lottery tickets: buy used, pray for mercy. The new data flip the script. Fleet-wide, 96% of batteries retain factory-fresh capacity; barely one in ten dips below the 85-point red line. The catch: mileage alone no longer tells the story. A 110,000-km Hyundai with thermal-management savvy can outscore a 70,000-km Renault that cooked its cells in stop-and-go heat.
Manufacturers have already folded the lesson into 2022-and-newer models, all clustering between 97 and 100 SoH. The gap between hero and villain brands has collapsed, proof that the first-wave chemistry gamble is over. But for anyone eyeing 2016-2021 stock, the past still haunts the lot.
La cifra habla por sí sola: below 85 SoH, re-sale algorithms slash trade-in offers by double-digit percentages. Dealers know most shoppers still ask “How far will it go?” when they should ask “How healthy is the pack?” A five-minute OBD scan can now answer before cash changes hands.
The takeaway is blunt. Kilometres are a proxy; chemistry is the verdict. Ask for the SoH print-out or walk. The 90,000-km cliff is real, but it’s only fatal if you pretend it isn’t there.