TriPac APU ROI Calculator

Calculate Your Idle Reduction Savings

Compare the estimated yearly cost of idling a tractor engine against a Thermo King TriPac APU. Adjust fuel price, idle time, fleet size, installed equipment cost, residual value, annual DPF cleaning, hotel and motel pay, and operating details to estimate savings, payback, and five year net savings after ROI.

Yearly Savings $0 Updates automatically as inputs change.
5 Year Net Savings $0 Shown after estimated APU investment.
Payback Period 0 months Based on net investment.
Selected Unit Diesel Diesel or Envidia APU.

Calculator Inputs

Start with the defaults, then update the numbers to match your operation. Results update automatically. DPF cleaning is calculated as an annual savings amount, not a monthly amount.

Shows per truck savings and fleet totals when more than 1 truck is entered.
You can change this anytime.
How long the truck would normally idle each rest period.
Typical sleeper or rest periods per year.
Default is 1 gallon per hour at idle.
Default value is $14,535 per truck.
Payback uses installed cost minus residual value.
Estimated annual APU maintenance expense per truck.
Default is $1,500 per year. This is added once annually, not monthly.
Put 0 if hotel and motel pay does not apply.
Diesel TriPac power pack fuel use is 0.185 gph.
Heater fuel use is 0.06 gph.
Optional. This field only applies to TriPac Envidia.
Optional Additional Annual Savings
Optional annual savings from reduced engine idle hours.
Optional annual savings beyond the DPF cleaning estimate above.
Optional annual savings from reducing DEF usage and related idle time DEF expenses.
Optional annual savings from avoided downtime expenses.
Optional annual savings where diesel fired heater hours are comparable.
Optional annual value for comfort, retention, or related operating savings.
Cooling or power pack hours plus heater hours were higher than total idle hours. The calculator adjusted APU hours for the estimate.
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Estimated Annual Savings Per Truck
$0
Your savings estimate will appear here.
5 Year Net Savings After ROI Per Truck $0

This is annual savings multiplied by 5, minus the net APU investment.
Typical APU service life is 7 to 10 years with proper maintenance.

Annual Savings Per Truck$0
Total Fleet Annual Savings$0
Monthly Savings Per Truck$0
Payback Period0 months
Fuel Savings Per Truck$0
Added Annual Savings$0
Gallons Saved Per Truck0 gal
Net Investment Per Truck$0
Total Fleet Net Investment$0
Selected UnitDiesel
Savings Estimate Summary

Enter your usage details to see estimated savings, payback period, and 5 year net savings after ROI.

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How the Calculator Works

The calculator estimates annual savings by comparing yearly truck idle cost against yearly APU operating cost. It then adds annual DPF cleaning savings, annual hotel and motel pay, annual DEF expenses while running idle, and any other optional annual savings entered. Monthly savings are calculated only after the full annual savings total is complete.

Truck Idle Cost

Idle hours are multiplied by nights used per year, truck fuel burn, and diesel price.

APU Operating Cost

Diesel APU cost includes power pack fuel, heater fuel, and annual APU maintenance. Envidia includes heater fuel, optional charging cost, and annual APU maintenance.

5 Year Net Savings After ROI

This number uses five years of annual savings, then subtracts the net APU investment so the long term value is shown after the APU has paid for itself.

Important Savings Note DPF cleaning is treated as a yearly amount. A $1,500 DPF value is added once per year, then the calculator divides the final annual savings by 12 to show estimated monthly savings. Payback uses the installed APU cost of $14,535 minus the residual value of $200 by default. Typical APU service life is 7 to 10 years with proper maintenance.
This calculator is for estimate purposes only. Actual results can vary based on operating conditions, climate, driver behavior, diesel price, battery condition, maintenance costs, DPF costs, DEF expenses while running idle, maintenance downtime expenses, hotel and motel pay, truck setup, and local idle laws.

Built In TriPac Comparison

These specs are included to help compare the diesel and electric APU options.

FeatureTriPac Diesel APUTriPac Envidia APU
Cooling Capacity13,000 BTU/hr8,000 BTU/hr
Heating Capacity7,500 BTU/hr7,500 BTU/hr
RuntimeUnlimited while fuel is available10 hours estimated
CARB and EPA ComplianceYesYes
Dimensions23.6 x 25.8 x 26.9 in.20 x 18 x 27 in.
Total Weight489 lbs, 518 lbs with ATD486 lbs
ControllerNew digital HMIStandard HMI
Scheduled Maintenance2,000 hours2,000 hours
Warranty2 year warranty1 year warranty
Noise Level67.8 dB59.0 dB
Fuel Efficiency for Power Pack0.185 gphMinimum impact
Fuel Efficiency for Heater0.06 gph0.06 gph
Inverter Support and Hotel LoadYesYes
Driver SatisfactionYesYes
Dealer NetworkYesYes