Assume gasoline or diesel costs $4 per gallon. A gallon has an approximate energy content of 125,000 BTU.

Assume power from the electrical grid cost $0.10 per kilowatt hour. At that price, you would pay $3.63 for the equivalent of 125,000 BTU.

The HPEV plug-in conversion system also incorporates regenerative braking which helps charge the batteries whenever you brake. That decreases how much power you require from the electrical grid.

Plus, our electric drive train is 74% efficient, whereas an internal combustion engine is only 30% efficient.

So, our plug-in conversions use cheaper fuel, have regenerative braking, and more efficient drive systems. That combines to yield an operating cost that is 25% of what it would cost to run on diesel or gasoline.