A look at CNG station project costs

The estimated cost ranges for various sizes and types of CNG fueling stations and a variety of other factors contribute to the total cost of a completed fueling station. The most significant costs associated with developing a station are those related to land, engineering drawings, station design, equipment, and construction. The actual costs of a given project will vary according to the specific needs and constraints of the fueling station and its users.

The available gas pressure (inlet pressure) in the supply gas line can have a significant impact (positive or negative) on fueling station costs as well. If a site has low gas pressure in the gas line, additional compression and/or higher horsepower may be needed, which will increase capital and operating costs.

The site location and preparation needed for the CNG station will have a significant effect on the overall development cost. Land costs vary based on many factors, such as location and size. Prior to installing CNG fueling equipment, general site work may be needed, such as grading, filling, compacting, paving, and stormwater management.

Increased project costs may result from project management challenges, such as supplier reliability, expediting equipment delivery or installation, or regional labor costs.

Operational costs such as electricity, insurance, and accounting software should be taken into consideration and accounted for in the fuel price. Electricity charges include consumption and demand charges, which vary across the country. The accounting system processes fuel purchases and ensures that relevant federal, state, and motor vehicle sales taxes are applied. It is important to note that a maintenance contract is critical for the long-term performance of a station. Minor preventive maintenance is scheduled on a regular basis, along with periodic major maintenance activities.

The tables below provide estimated cost ranges for a large fast-fill CNG station. These estimates include the costs of engineering, equipment, and installation at a site with the specified assumptions. The estimates do not include costs associated with unusually complicated installations, difficult permitting issues, compressor redundancy, or factors that could increase the total project cost.

Unless otherwise noted, the estimates for fast-fill stations assume a vehicle fueling window in which 70% of the fuel is dispensed during two hours in the morning and two hours in the afternoon. For time-fill stations, the compressor is assumed to run for 10 hours per day. Fast-fill cost estimates for the small, medium, and large stations include a priority panel and credit card reader. All scenarios include a gas dryer.

It is important to note that the cost of a CNG station may vary substantially from the estimates listed here. Contact a CNG equipment supplier or engineer who specializes in CNG station design to determine the appropriate design and cost for a specific application.