Find the vehicle-specific approval first
Ask for the applicable owner's instructions and an accessory fitment confirmation identifying the model, year and market version. Establish whether roof loading is permitted and which mounting arrangement is approved. Do not infer a load rating from the strength of a decorative rail or transfer a rating from another BYD SUV. The version specification checks help identify the actual vehicle. If the information cannot be confirmed by a competent supplier, keep the roof plan unresolved and reassess whether the cabin alone meets your luggage requirement.
Count the whole system, not just the luggage
Where roof loading is approved, assess the relevant vehicle and accessory limits together. The bars, feet, box and its contents all contribute to the roof system's mass; they also contribute to the vehicle's overall loading. Confirm passenger and luggage allowances using the actual vehicle documentation rather than an assumed generic SUV capacity. Do not confuse a stationary load claim with a permitted driving load. A system that fits physically may still be unsuitable once the intended family, bags and equipment are included.
Check the mounting and glass-roof relationship
Have a competent installer confirm the correct feet, bar locations, tightening procedure and clearances for the fitted roof. If glass or opening roof equipment is present, verify the permitted relationship between that equipment and the carrier. Do not drill, clamp or modify mounting points based on a universal kit video. Ask how the system should be inspected after initial use and how loose or damaged components are handled. Retain the fitting instructions and part numbers so future removal or refitting does not depend on memory.
Measure the places the loaded vehicle must enter
Measure the completed vehicle height with the actual carrier and box, allowing for the safe margin recommended by the relevant operator or installer. Check home parking, ferry arrangements, destination garages and the public chargers you expect to use. A height barrier can make a charging stop unusable even when the connector is compatible. The public charging access guide helps incorporate this restriction into travel planning. Do not rely on the standard brochure vehicle height after adding roof equipment.
Plan for energy and handling changes
External luggage can change aerodynamic demand and vehicle behaviour, so do not assume the original range estimate remains unchanged. The effect depends on the system, load, speed and conditions; a universal percentage would be misleading. Follow the vehicle and accessory operating restrictions and distribute cargo as instructed. Secure contents so movement cannot shift the load unexpectedly. For the first journey, use a conservative route with verified charging alternatives and inspect the installation at the intervals specified by the supplier.
Compare the roof solution with cabin alternatives
Try the actual bags in the cargo area with every required seat and restraint in use. A different bag shape or a smaller stroller may solve the problem without exterior equipment, but do not sacrifice safe restraint or visibility to preserve a preferred vehicle choice. Roof access also needs to be manageable for the person who will load it. Consider lifting difficulty, wet weather and whether luggage can be retrieved without climbing unsafely. If regular journeys exceed the vehicle's practical capacity, compare a more suitable model rather than normalising an awkward workaround.
Keep accessories separate in the purchase agreement
List exactly which carrier parts are included, their condition and the evidence supporting fitment. Used accessories need inspection for damage, missing hardware and incompatible substitutions. Include removal and packing arrangements in the shipping plan if the equipment will not travel installed. Do not describe an unverified carrier as a standard vehicle feature. The final acceptance should distinguish approved and fitted equipment from optional future purchases, with a realistic total budget and no assumption that all overseas Atto 2 accessories suit a China-market Yuan Up.
Buyer checklist
- Confirm roof loading is permitted for the exact car.
- Include bars and box in the load calculation.
- Verify mounting, glass clearance and total height.
- Reassess range and charging access with the loaded setup.
Questions and answers
Do visible roof rails prove that a roof box is allowed?
No. Confirm the vehicle's approved load and the accessory application. A rail's appearance does not establish structural capacity, mounting compatibility or legal use.
Can I use a fixed range penalty for a roof box?
A single percentage would not reliably describe every setup. Use conservative planning and actual experience with the approved load, while maintaining accessible charging alternatives.
Reference information
Use the applicable market and year documentation for equipment and operating limits. The references have their own market and publication scope; they do not establish the condition, fitted equipment or destination approval of an individual vehicle.
Continue with the family and luggage fit guide, or send your vehicle requirements.