The Payback Calculator is designed to provide a quick view of operating natural gas vehicles, and guidance on service intervals and fuel systems.

A key factor in the business case for natural gas is fuel costs.  We’ve built this calculator so you can quickly see the potential savings available with natural gas.

The model shows basic service distance intervals based on hours of operation, idle time, and annual miles.  Another feature is a calculation of the natural gas fuel system capacity required for a day’s work.  More information on maintenance, and fuel systems and capacities is available in the Playbook.

Your Cummins expert team has tools to take a deeper look at the business case, including capital costs, funding, and NPV calculations.

Details:

• User inputs are: Application, Annual Miles/KM, daily idle time, daily operating hours and idle time, fuel costs, and current fleet fuel economy.
• The model will calculate natural gas fuel economy based on user supplied fuel economy data of the current fleet. Default natural gas factor is based on CWI data, and engine data sourced from model year 2016 diesel and natural gas engines certification data. Actual fuel economy may vary by application.
• Cummins published service intervals are established in hours, miles/KM, or months/years – whichever comes first. The best practice is to set fleet intervals based on the recommended hourly intervals multiplied by the average fleet speed.
• The model calculates average speed based on user inputs and creates recommended service distance intervals for 500, 1,000, 1,500, and 2,000 hour service intervals.
• Based on customer inputs, a calculation is made to determine fuel system requirements to complete one day of operation of the vehicle. The model includes a 10% reserve in the calculation.  This is only an estimate for users.  We recommend that customers contact a fuel system provider for guidance on configuring the fuel system for their operation.
• A custom analysis would be required for regional or site-specific customer cases. Contact your Cummins representative for more information.