[?] BYD Warranty Terms for Ultra-Fast Charging Degradation

BYD offers a battery warranty covering capacity retention above a stated threshold under normal use conditions. Normal use is not defined in publicly available documents in a way that explicitly includes or excludes routine daily flash charging at 4-6C. For a ride-hailing operator flash-charging twice daily, this ambiguity is a commercial risk. If BYD’s warranty fine print excludes degradation caused by routine ultra-fast charging, the battery replacement cost falls to the fleet operator — a line item that could represent $8,000-15,000 USD per vehicle over a 5-year operating cycle. What would resolve it: A written statement from BYD fleet sales specifying whether routine 4C or higher daily charging constitutes normal use under warranty terms. Request this before procurement. Dealers may not know the answer. Escalate to BYD fleet/commercial division.