HVIP provides attractive incentives for the purchase of CARB-approved Low NOx natural gas engines. Incentives for Low NOx natural gas engines are available for new and repowered vehicles on a first-come, first-served basis. As of Oct 26, 2018, vouchers are no longer available for 8.9L engines for transit bus applications, and vouchers are only available for 8.9L engines for refuse vehicles if they are replacing a diesel refuse vehicle.
As of fall 2018, the Cummins Westport 8.9 liter natural gas engine and the Cummins Westport 11.9 liter natural gas engine are the only low NOx natural gas engines currently eligible for HVIP incentives and are certified to 0.02 g/bhp-hr NOx standard which is 90 percent below the current NOx standard.
The Incentive Value for Low-NOx Vouchers is $45,000
Currently, incentives for Low NOx natural gas engines are designed to cover the incremental cost of a Low NOx natural gas engine relative to a baseline diesel engine. Incentives for Low NOx engines may be used in conjunction with other vehicle incentives (such as the California Energy Commission’s Vehicle Incentive Project or programs managed by regional air districts) which cover the incremental of a diesel engine to that of a conventional natural gas engine, as long funding for the incremental Low NOx portion is not duplicated.