New Clean Diesel Buses Upgrade Fleet…
July 29, 2019 | IEEE Spectrum
Happiness now shuttles about 4,500 passengers a day—1.7 million per year—on a short hop across Kaohsiung Harbor. The plucky little ferry doesn’t look like a trendsetter, but it is. Since its introduction, dozens of other hybrid-electric and fully electric ferries have been unveiled around the world, and the number is growing year by year.
Rather than designing a new vessel from scratch for this experiment, we opted to retrofit an existing diesel boat. This decision was driven mainly by cost considerations: Because our focus was on the electrical and propulsion systems, we figured that starting with a boat that was already proven to be seaworthy was the more practical and economical option. The cost of retrofitting Happiness came to $400,000. By comparison, a later hybrid-electric ferry that we built from scratch cost about $2 million.
Click below to read more details on how the hybrid diesel-electric retrofit was carried out.