Plan EV range for high-altitude routes by verifying the vehicle's identity first, then confirming the commitments. Concrete evidence comes from energy consumption changes on climbs and descents, temperature, load and AC usage, and charging points along the route and backup margin. Estimate the route in segments for climbs, descents, temperature and load, and re-check the charging points against real operating conditions. Keep energy consumption changes on climbs and descents and temperature, load and AC usage on one versioned master sheet; when charging points along the route and backup margin changes, update the records before signing off.
During the quotation stage, you can also refer to How important is battery thermal management for Chinese EVs used in GCC countries?. High-altitude EV range planning is ultimately governed by the local rules and written confirmations in force at the time of processing.