APFCT ZES II fuel cell scooter was completed in October 2000. It is a conversion prototype from lead acid battery scooter. ZES II is equipped with two on-board metal hydride hydrogen storage canisters and is for feasibility demonstration. ZES II was exhibited at 2000 Fuel Cell Seminar Conference held in Portland, OregonUSA.

APFCT ZES II.5 fuel cell scooter was completed in June 2001. It is a conversion prototype from lead acid battery scooter. ZES II.5 is improved in cooling system. ZES II.5 was showed at several domestic exhibitions in Taiwan.

APFCT ZES II.6 fuel cell scooter was completed in December 2001. It is a conversion prototype from lead acid battery scooter. ZES II.6 is improved in electric control. It was tested at Automobile Research and Testing Center (ARTC) in Taiwan with 57.5 kph speed and 73 km driving range using 2 MH hydrogen storage canisters. ZES II.6 was showed at several domestic exhibitions in Taiwan.