24V DC Truck Air Conditioner: Heavy-Duty No-Idle Parking AC

• Table of Contents

1. Where 24V parking AC is the right choice
2. 24V rooftop and split parking AC models
3. Battery sizing and current draw for 24V parking AC
4. 24V parking AC for buses and construction machinery
5. OEM, distributor and fleet supply for 24V parking AC

European, Australian and most Asian heavy trucks run on a 24V chassis, so the right parking AC for those markets is a 24V DC truck air conditioner. Vethy supplies 24V rooftop and 24V split parking air conditioners that mount directly on heavy-duty tractors, buses, coaches, mining haul trucks, excavators and military vehicles.

This page covers the typical 24V applications, battery sizing, and the right Vethy model for each platform.

Where 24V parking AC is the right choice

Specify a 24V Vethy parking AC when the host vehicle uses a 24V electrical system. Typical examples:

• European sleeper tractors: Volvo FH, Scania R/S, MAN TGX, Mercedes Actros, DAF XF, Iveco S-Way.
• Australian road trains and bonneted tractors with 24V conversions.
• Asian heavy trucks: Sinotruk, FAW J6/J7, Dongfeng, Hino, Isuzu Giga, UD Quon.
• Buses and coaches.
• Construction and mining equipment: excavators, wheel loaders, rigid haul trucks, crane carriers.
• Military and overland 4×4 conversions running 24V.

24V rooftop and split parking AC models

• VS02-PRO 24V rooftop parking AC – 2,400 W cooling, night mode <49 dB(A), R410A twin-rotor compressor.
• VX3000SP 24V split parking AC – split mount for tractors with limited roof clearance.
• VM6000 Max 24V high-power rooftop parking AC – higher capacity for oversized cabs and bus applications.
• ZH1000 24V dual-rotor rooftop parking AC – cost-optimized integrated unit.

Battery sizing and current draw for 24V parking AC

At 24V, the same cooling output draws roughly half the current of a 12V system, which means smaller wiring and lower voltage drop. Typical draw on the 24V VS02-PRO is 9 to 12 A in night mode and 22 to 28 A at full cooling.

Reference runtimes at 30 °C ambient:

• 2×120 Ah AGM at 24V – 8 to 10 hours overnight cooling.
• 2×200 Ah LiFePO4 at 24V – 14 to 18 hours.

All 24V units include low-voltage cutoff at 22.8 V.

24V parking AC for buses and construction machinery

Beyond trucks, 24V parking AC is widely used on city buses, intercity coaches, mining haul trucks and excavator cabs. Vethy supports cab-specific brackets, dust filters for harsh environments and IP-rated outdoor housings. For mining and quarry use cases, see mining machinery retrofit.

OEM, distributor and fleet supply for 24V parking AC

Vethy supplies 24V parking AC in three commercial paths: OEM customization for truck and bus builders, distributor wholesale with regional exclusivity, and direct fleet supply. See truck parking AC manufacturer and parking AC wholesale, or request a quote.

Frequently asked questions

Is a 24V parking AC more efficient than 12V?

Per watt of cooling, electrical losses are lower at 24V because current is halved. For European and Australian heavy trucks already running 24V, a 24V parking AC is the correct match and avoids voltage conversion losses.

Can a 24V parking AC be used on a 12V vehicle?

Only with a 12V to 24V DC-DC converter, which we generally do not recommend. For 12V chassis, specify a 12V Vethy unit instead.

Do you supply units for European E-mark compliance?

Yes. Rooftop and split units can be supplied with ECE R10 EMC compliance and CE marking. Confirm the target market when requesting a quote.

What is the warranty on a 24V parking AC?

Standard warranty is 24 months on the unit and 36 months on the BLDC twin-rotor compressor. Extended warranty is available for fleet contracts.