Lightning Hybrids makes powerful hybrid drive systems for vehicles like shuttle and transit buses, delivery trucks and other fleet vehicles with heavy duty cycles. This technology saves fleets fuel and brakes, increases power and significantly reduces harmful emissions. The hydraulic hybrid system has no batteries. It uses hydraulic pumps/motors and an accumulator (power storage unit) to store braking energy and use it to accelerate the vehicle. The system can be applied to vehicles using any fuel type: gasoline, diesel, CNG, propane.