Compare parking AC quotations at the point where the vehicle is ready to work. An equipment-only price can omit mounting parts, electrical components, installation labor and commissioning. Two apparently similar offers may therefore cover very different projects.
Define a common quotation boundary
Give every supplier the same vehicle application and required operating period. Ask for an itemized scope that separates the cooling unit, installation hardware, electrical requirements, controls, documentation and spare parts. Mark items supplied by the buyer or installer rather than leaving them implicit.
Identify the commercial delivery terms and destination. Obtain current logistics and import-cost information from the responsible service providers for the actual shipment. Do not apply an old freight quote or a generic tax percentage to a new destination.
Build the installed-cost worksheet
| Cost group | What to request |
|---|---|
| Equipment | Exact configuration, included accessories, packaging and quantity basis |
| Vehicle integration | Mounting, approved electrical arrangement and labor |
| Energy storage and replenishment | Required battery and charging equipment, if additional |
| Delivery | Freight, handling and applicable destination charges |
| Commissioning | Functional checks, training and acceptance records |
| Service exposure | Spare parts, claim handling and likely vehicle downtime |
Compare equivalent solutions
Industry material such as Thermo King's 2026 APU whitepaper discusses both diesel and electric approaches to reducing unnecessary main-engine idling. Their system boundaries differ. When evaluating alternatives, list the functions each proposed package provides and the energy source it requires instead of comparing a single hardware price.
For a fleet model, keep purchase cost separate from operating assumptions. Show the expected duty cycle, replenishment cost, maintenance allowance and service arrangement. Label estimated values so that a quotation does not appear to contain guaranteed future savings.
Resolve exclusions before ordering
Ask suppliers to return an explicit exclusions list. Confirm who pays for diagnosis, replacement-part freight and installation labor in different failure scenarios. Record the warranty terms for the quoted configuration rather than assuming that a general brochure covers every cost.
A useful comparison ends with the same deliverable from each bidder: an installed, commissioned cooling system meeting an agreed duty. This makes price differences explainable and gives the purchasing team a clearer basis for negotiation.
Next step
Compare the available configurations in the Vethy product catalog, then request the current model-specific documentation before selecting a unit.
Sources and method
- Thermo King — APU whitepaper 2026 · 2026-02