Overview On diesel, its revolutionary Hybrid system can automatically utilise its electric motor to boost power whenever needed. This allows the Hybrid 4x4 to operate with a smaller engine, reducing fuel consumption and its exhaust purification system then further reduces CO/NOx, particulates, and noise emissions. The Hybrid 4x4 can also operate on battery alone, making it ideal for indoor, quiet or clean applications. Diesel Re-Gen recharges the batteries without a mains power source and a fast charge is achieved whenever the machine is idle and the engine is left running.