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Fuel cells currently fail to provide a viable or cost-effective energy solution for cruising sailboats due to high fuel costs, low efficiency, and technical limitations.2:40 Nigel Calder notes that methanol-based fuel cells, such as those from E4U, result in electricity costs of $10 to $20 per kilowatt-hour, significantly higher than standard shore power rates.1:35 These systems require cracking hydrocarbons like methanol to extract hydrogen, a process that yields less electricity per litre than a well-optimised diesel generator or a main engine alternator.2:08 Attempts to use diesel or propane as fuel sources have repeatedly failed because trace impurities in commercial-grade fuels destroy the fuel cell stacks.3:53 Furthermore, direct hydrogen storage remains impractical for marine use due to the extreme pressures required and the inherent flammability of the gas.3:16 For offshore cruising, solar arrays paired with high-capacity battery banks remain the most effective alternative to diesel-based generation.5:20

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