Sailing Uma · video

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The hybrid-electric propulsion system on a large charter catamaran utilizes two 30-kilowatt Bellmarine Drive Master motors powered by a 144-volt DC battery bank.1:00 Two 22-kilowatt Fisher Panda generators automatically charge the propulsion bank when battery levels drop to 35 percent, typically running four hours daily to support house loads, including air conditioning and seven refrigerators.1:52 The vessel separates the 144-volt propulsion bank from a 24-volt house bank, using Victron MPPT charge controllers to maintain the house system.6:34 This configuration provides redundancy, ensuring navigation instruments and the windlass remain operational if the propulsion bank fails.7:28 The boat features dual 120-volt and 230-volt Quattro inverters to accommodate international shore power standards.10:45 Designed for charter, the layout includes six double cabins, two crew cabins, and a galley separated from guest living areas.14:06 While the system simplifies operation for charter crews through automation, the generators produce diesel exhaust odors that can circulate into the cabin while at anchor.3:04

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