Thermo King APU Alternative: Vethy Battery-Powered Parking AC

• Table of Contents

1. Why fleets retire TriPac diesel APUs
2. Direct replacement: Vethy VS02-PRO 12V rooftop AC
3. ROI vs keeping the TriPac
4. Migration plan

Thermo King's TriPac is the legacy diesel APU in many U.S. fleets, but rising fuel cost, DPF regen issues and 60+ dB(A) noise are pushing fleets to a battery-powered Vethy parking air conditioner. This page is the buyer guide for fleets replacing TriPac units with Vethy 12V or 24V rooftop or split parking AC.

Why fleets retire TriPac diesel APUs

• 0.15 to 0.25 gph fuel burn, ~$1.50/hr at current diesel prices.
• DPF regen interruption during driver rest.
• Engine oil, fuel filter and belt service every 1,500–2,000 hours.
• 60 to 72 dB(A) running noise vs Vethy <49 dB(A) night mode.

Direct replacement: Vethy VS02-PRO 12V rooftop AC

For U.S. Class 8 sleepers, the VS02-PRO rooftop unit drops into the standard 360 × 360 mm hatch. Wire to the sleeper battery bank — typical 4×100 Ah AGM gives 8 to 10 hours of overnight cooling.

• VS02-PRO rooftop parking AC – 12V/24V R410A twin-rotor, flagship sleeper cab cooling.
• VX3000SP split parking AC – 12V/24V split, condenser-evaporator separated.
• VM6000 Max high-power rooftop AC – oversized cabs and double-bunk trucks.
• ZH800 inverter rooftop AC – low current draw for battery-sensitive fleets.

ROI vs keeping the TriPac

Average TriPac fleet saves 300 to 500 gallons of diesel per truck per year + $400 to $800 in APU maintenance after switching to a Vethy parking AC. Payback is typically 12 to 18 months at U.S. diesel prices.

Migration plan

1. Pilot 5 trucks: remove TriPac (or leave for heat only), install VS02-PRO and 4×100 Ah AGM upgrade.
2. 90-day data collection on fuel, idle hours, driver sleep score.
3. Fleet roll-out with branded packaging, spare parts kit and remote inventory.

Vethy supports three buyer paths: fleet direct, OEM and upfitter, and distributor and wholesale. Request a quote or email info@vethy.com.

Frequently asked questions

Will the Vethy parking AC keep the sleeper cool in Texas summer like the TriPac did?

Yes. VS02-PRO is rated to 52 °C / 125 °F. Cooling capacity at 35 °C ambient is around 2,200 W, similar to a 7,000–8,000 BTU residential mini-split.

Can I keep the TriPac for heating and just add the Vethy AC for cooling?

Yes. Many fleets run a hybrid setup: Vethy parking AC for cooling, TriPac for cold-weather pre-heat and 120V loads. Combined APU runtime drops 60 to 80 %.

Is the install dealer-friendly?

Yes. Drop-in 360 × 360 mm cutout, fused harness, gasket and adapter plate included. A Class 8 install typically takes 3 to 4 hours.

Do you support fleet orders with branded packaging?

Yes — see <a href="/truck-fleet-air-conditioning-solution.html">truck fleet air conditioning solution</a>.