Sailing Uma · video

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To maximize solar energy production on a sailboat deck prone to frequent shading, the crew of the 40-ft catamaran Uma installed 1.5 kilowatts of solar power divided into 17 independent, redundant mini-arrays.8:34 By wiring panels in small, isolated groups and utilizing bypass diodes within each panel, the system ensures that shading on one section does not compromise the output of the entire array.4:03 The installation uses Maxxeon Gen 3 cells, which are selected for high shade tolerance.9:08 To manage the electrical layout, the crew routed oversized 4mm cabling through custom 3D-printed brackets behind cabin-top ceiling panels, allowing for easy troubleshooting and maintenance.11:49 The system incorporates multiple layers of safety, including dedicated fuses for each zone and MPPT charge controllers that step up voltage to charge a 48-volt battery bank.13:25 This modular design ensures that damage to a single panel or controller results in only a marginal loss of total power, maintaining system reliability despite the unpredictable shadows cast by rigging and sails.19:40

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