EnerDel featured two new products, including the MHPS, which uses an onboard battery energy storage system (BESS) as the normal source to the load, enabling it to more quickly and efficiently adjust to load fluctuations than traditional engine driven generators. The BESS reduces generator size and runtime, dramatically reduces fuel consumption and fueling operations, and extends system maintenance intervals. Meanwhile, the air-cooled PP320-689-LP Vigor+ ESS is a direct drop-in replacement for NiMH packs currently populating many diesel-hybrid buses.