Hybrid electric ferry takes maiden voyage on San Francisco Bay

SAN FRANCISCO (LOG NEWS SERVICE) — On Sept. 13 the first-of-a-kind hybrid ferry took its maiden voyage in the San Francisco Bay. The new Red and White Fleet’s sightseeing ferry, christened Enhydra, is the largest plug-in hybrid electric passenger vessel built from the keel up under U.S. Coast Guard regulations.           The vessel at 128 feet in length has a capacity of 600 passengers on its three decks. Enhydra, which was launched on Aug. 13 in Bellingham Washington, is RWF’s first step towards its goal of reaching a zero emissions fleet by 2025. The hybrid drive system operates much the same as a plug-in Prius, efficiently moving from all electric to mechanical-electric mode depending on load and providing no less than 20 to 30 percent fuel savings. Additionally, the onboard permanent magnet generators are powered by EPA Tier 3 engines run on 100 percent biofuel, further reducing emissions with a 30-80 percent lower carbon intensity and lower criteria emissions than fossil fuel. The hybrid architecture allows overnight charging of the battery packs, offsetting fuel consumption with green energy supplied from San Francisco PUC’s hydro-electricity. Further, the design of the propulsion system anticipates moving the vessel to full electric with upsized battery packs. RWF...