Name propulsion and refrigeration power separately
An electric refrigeration compressor does not necessarily sit on a battery-electric truck. Its approved supply may come from the vehicle, separate storage or external power. Write propulsion and refrigeration power on separate lines in the quotation.
Compare road, parked and standby modes against the same temperature duty. A chassis-driven compressor, an independent diesel unit and an electric arrangement have different integration and service requirements. External-power standby is a specified mode, not a promise of cooling anywhere with the engine stopped.
Check output and changeover in every required mode
Thermo King’s e200 illustrates electric refrigeration on different vehicle types; it does not establish compatibility or inclusion on a KEEYAK offer. Ask for the actual power budget, mode-specific capacity and documented behavior when supplies change.
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| Decision | What to establish | Condition or limit |
|---|---|---|
| Chassis-engine-driven unit | Ask how the compressor is driven and what output is available in the required road and idle conditions. | A unit rating at a stated drive speed is not proof of equivalent output during every stop. |
| Independent diesel unit | Identify the separate engine, fuel supply, maintenance schedule and permitted parked operation. | Independence from chassis propulsion does not remove fuel, service, site-access or noise constraints. |
| Electric unit on an engine-powered truck | Check the approved alternator or electrical supply with the truck and refrigeration suppliers, including stationary use. | An electric compressor does not make the truck battery-electric or eliminate emissions from its engine. |
| Electric unit on a battery-electric truck | Agree the interface, power budget and energy-management behaviour as part of vehicle integration. | Cooling may share traction energy or use separate storage; the quotation must identify which. |
| Electric standby | Compare capacity in standby against the required condition and confirm the exact site electrical supply. | Road and standby capacities may differ. An optional standby feature is not installed unless listed in the offer. |
| Switching between supplies | Request the documented changeover behaviour, alarm response and operator handover for the installed system. | Do not infer uninterrupted cooling, automatic restart or simultaneous charging from a generic product description. |
| Cost and support | Compare purchase, integration, fuel or electricity, service and expected downtime using one operating schedule. | No architecture has a universal cost advantage without local tariffs, duty, maintenance and installation costs. |
Compare operating cost on one delivery schedule
Identify installed equipment, supply interfaces, service scope and permitted parked operation. Use local energy prices and the agreed duty for the cost comparison, with integration and downtime assumptions visible.
Information to prepare for this review
- Chassis propulsion, model, body-builder interfaces and available auxiliary power
- Required cargo temperature, body specification, ambient conditions and refrigeration selection brief
- Driving, idle, loading, unloading and overnight holding periods
- Customer-site restrictions to be checked locally, including permitted engine operation and noise requirements
- External supply voltage, phase, frequency, connection and access at each planned parking location
- Local technical support, planned vehicle life and the common operating schedule for cost comparison
Records to request and keep
- Quotation separating chassis propulsion, compressor drive and every included power mode
- Exact refrigeration model and capacity data at the agreed box and ambient conditions for each relevant mode
- Approved integration statement and body-builder requirements for the proposed vehicle supply
- Standby connection schedule and confirmation from the intended facility
- Documented stationary cooling capability for the planned delivery and waiting periods
- Maintenance responsibilities divided between chassis, body, refrigeration and electrical integration suppliers
- Comparable cost worksheet with dated energy prices and assumptions identified rather than presented as measured savings
Common mistakes and what to check instead
- Treating electric refrigeration as proof of electric propulsion: Specify the propulsion and refrigeration systems separately and check the source of electricity.
- Assuming every electric system works indefinitely with the engine stopped: Identify the available stored energy or external supply and validate the intended holding period.
- Choosing the power source before defining the cooling duty: Use the same body, cargo and route heat-load brief when comparing the candidate architectures.
Scope of this guide
Equipment compatibility, installation and service remain specific to the selected chassis and unit.
Third-party examples describe possible architectures; they do not establish supplied brands, options or destination permissions.
This guide compares power arrangements. It does not replace refrigeration heat-load selection or an electrical installation design.
Sources and applicability
OEM example of an electrically driven refrigeration unit offered for electric and engine-powered vehicles. This is an architecture example, not an offered KEEYAK component or compatibility statement.
Does not establish: It applies to the named manufacturer example and does not establish a KEEYAK model rating or project result.
Model-specific alternator, standby and body-builder integration considerations. Numerical ratings are not transferred to a KEEYAK specification.
Does not establish: It applies to the named manufacturer example and does not establish a KEEYAK model rating or project result.