Conversion companies and “upfitters” are entities that can convert an appropriate vehicle to run on CNG, propane autogas, or electricity. Both dedicated and bi-fuel conversions are available, although it varies by company as what kind of conversion they do.

It is more common to see conversions on light- to medium-duty sized vehicles. While CNG and propane conversions have been going on for years, more companies are joining into the conversion space for electric vehicles – taking an older diesel vehicle and converting it to run solely on electricity. Learn more about some CNG and electric conversion and upfitter companies below.