Concerns Arise Over 2021 Tesla Model Y Purchase With 50,000 Miles, Neglecting Pre-Purchase Battery Health Inspection
In the world of electric vehicles (EVs), battery health plays a significant role in determining the overall performance and resale value of a Tesla. A recent discussion in the "Tesla Model Y" Facebook group highlighted this, as new owner Andrea Gariti shared her concern about her Model Y's battery health, which stood at 82%.
Gariti's battery health percentage is below the 90% threshold that raises eyebrows in the Tesla community. Many long-term EV owners have reported that the first few percentage points of range loss happen faster, but things tend to stabilize afterwards.
This gradual loss of capacity means that a used Tesla with some years on it will have a reduced maximum driving range compared to a new model. Studies analyzing owner-reported data suggest that a Tesla battery might retain about 85% to 90% of its initial capacity after 4 years and roughly 82.5% after 10 years. The initial drop often happens within the first 15,000 miles and then levels off somewhat.
Battery degradation is a significant factor influencing the resale value of used Teslas. Buyers on the used market tend to expect some degradation but often factor it into their valuation, leading to lower resale values compared to new vehicles. However, Tesla's warranty guarantees at least 70% battery capacity retention during the warranty period, which provides some assurance to buyers and helps maintain resale value.
The role of battery health tests is essential when buying a used EV, especially from a private seller. Tesla, unfortunately, does not offer an official battery health report. This lack of transparency in the EV world is something that may need to change as secondhand electric cars become more common.
Some commenters in the Facebook group offered their perspectives. Lin Pato mentioned that 82% battery health might stay the same for a while. Brandon AG offered an optimistic perspective, stating that decade-old Teslas with original batteries are still on the road. Matthew Espinoza suggested that a third-party battery health report should be a standard part of any EV purchase.
In summary, while battery degradation does reduce both range and resale value over time, Tesla batteries tend to degrade slowly enough and are supported by warranties, helping used Tesla vehicles remain practical and financially viable options. However, it's important not to panic if you see lower battery health numbers early on, as early battery degradation is common but often stabilizes. Real-world battery longevity can still vary significantly based on climate and charging habits.
[1] Battery University. (2021). Lithium-ion Batteries for Electric Vehicles. [online] Available at: https://batteryuniversity.com/learn/article/lithium_ion_batteries_for_electric_vehicles
[2] Tesla. (2021). Battery & Charging. [online] Available at: https://www.tesla.com/model-y/performance
[3] Electrek. (2020). New study shows Tesla Model 3 battery degradation is slowing down. [online] Available at: https://electrek.co/2020/02/05/new-study-shows-tesla-model-3-battery-degradation-is-slowing-down/
[4] Tesla. (2021). Limited Warranty and Roadside Assistance Coverage. [online] Available at: https://www.tesla.com/support/warranty
[5] InsideEVs. (2020). Tesla Model 3 Battery Degradation: Real-World Experiences & Data. [online] Available at: https://insideevs.com/news/525102/tesla-model-3-battery-degradation-real-world-experiences-data/
- Investing in car-maintenance, including regular updates on technology for car batteries, could help prolong the lifespan and maintain the resale value of an electric vehicle like the Tesla Model Y, as shown by Andrea Gariti's case with a 82% battery health.
- Electric vehicles, particularly Teslas, require careful consideration when purchasing used due to the gradual battery degradation over time. To ensure the quality of a used vehicle, some suggest obtaining a third-party electric-vehicle battery health report, as suggested by Matthew Espinoza in a recent Facebook discussion.
