The ENRG Power System (EPS) from ENRG Power Systems LLC is an innovative replacement / “Upgrade” ignition coil system which improves spark-ignition engine fuel economy with an easy-to-retrofit technology. This coil technology reduces fuel use (and operating costs) while also reducing greenhouse gas emissions, providing much of the benefit of new hybrid vehicles to truck and van fleets already on the road and in service, at a much lower cost