China has put rules in place regarding EV automaker battery degradation:
• Minimum capacity requirements:
– ≥82% after 5 years / 100,000 km
– ≥75% after 8 years / 160,000 km
– ≥70% after 10 years / 200,000 km
• Automakers must display real battery health (SOCE) to owners, accurate within 5%.
• Battery degradation must include virtual mileage (like using camp mode, V2L, etc.).
Tesla has stated that their batteries are designed to retain 80% of their original capacity after 321,000 km (200,000 mi), so they’re exceeding China’s requirements.