Use one distance and one reporting period
Ask the supplier or customer for the distance, dates and energy purchases behind a claimed result. Keep petrol receipts and relevant charging records for the same period. A fuel-only average and a combined operating-cost estimate answer different questions, even when both are described casually as consumption.
The L6 operating guide starts with ordinary use. Identify the actual model period and driving routine before using any reference figure. The customer’s charging access, trip length and longer journeys can differ from the conditions in an advertisement, so one favourable record should not become a universal monthly promise.
Check the starting and ending energy position
Ask whether the record begins and ends with broadly comparable fuel and battery states, or whether the comparison explains the difference. A short trip that draws down stored battery energy without recording its replenishment can understate the energy purchased to sustain that routine over time.
Do not demand artificial precision from incomplete evidence. Mark missing information and use a planning range where appropriate. A dashboard figure can still be useful, but its measurement boundary should be understood before the dealer converts it into an apparently exact cost per kilometre for a retail customer.
Separate electricity measurement points
Confirm whether kilowatt-hours describe energy billed by a charger, metered at the property or displayed by the vehicle. The L6 charging review helps identify the actual equipment and connection. A vehicle efficiency display is not automatically a record of the electricity purchased at the supply point.
Use current local tariffs supplied or confirmed by the customer and keep public charging charges distinct from a home rate. Include any relevant separately billed session or parking cost. Do not assume the most favourable tariff applies to every charging location or every hour of the customer’s normal schedule.
Calculate an explicitly assumed scenario
For arithmetic only, suppose a month involves 40 litres of petrol and 250 kWh of purchased electricity. At assumed prices of 1.20 currency units per litre and 0.20 per kWh, the subtotals are 48 and 50, making 98 currency units for those energy purchases.
These invented numbers are not an L6 test or a local price quotation. If the same period covers 1,400 kilometres, the energy-only amount is 7 currency units per 100 kilometres. That result excludes other ownership costs and is useful only as a demonstration of the calculation method.
Test a different charging routine
Repeat the worksheet for a period with less home charging or a higher public tariff. Do not keep the original favourable fuel result while removing the electricity that helped produce it. The inputs should describe a coherent operating scenario, not a collection of the lowest numbers available from unrelated journeys.
For a business with seasonal travel, calculate busy and quiet periods separately. A twelve-times-monthly estimate may be misleading when most long-distance use happens in a few months. Retain the assumptions so the customer can update the model when their route, tariff or access arrangement changes.
Keep condition and maintenance outside the fuel claim
A consumption result does not establish the state of the complete extended-range system. The high-mileage buying review helps relate use records to service and inspection without inferring condition solely from one energy number. Investigate an unexplained change through an appropriate provider rather than diagnosing remotely.
Keep preparation, routine servicing and possible repairs separate from the energy subtotal. A vehicle with a favourable running estimate may still require work that affects its buying value. The dealer should compare the finished proposal rather than allowing an attractive fuel figure to obscure an unresolved condition finding.
Ask for the evidence with the offer
Tell Panda the destination, accepted years and new or used preference, together with the expected charging routine. If operating cost is decisive, request relevant records and clear measurement boundaries. State whether the customer expects mainly local electric use or a substantial share of longer journeys.
Revisit the worksheet when a substitute changes the specification or when new evidence becomes available. The final explanation should identify both energy sources, local prices and remaining uncertainty. It should not present a fuel-only number as the full cost of running every Li L6 in every destination.