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This video will save your batteries. Energy management on board a boat
22. februar 2026 · 3 min · 3K visninger
Lagoon 42 exterior with 220V shore power at marina
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Energy management on a Lagoon 42 catamaran is the focus, covering how the boat's three 220V power sources — shore power, generator, and inverter — interact with the battery bank and where failures occur.0:05 The battery bank has a maximum continuous draw of around 2,000W; exceeding that limit damages both the batteries and connected equipment.1:00 A key failure mode is leaving a high-draw appliance — such as a hair dryer — running on inverter power overnight, which can destroy the battery bank.2:46 Before switching on any 220V source, the inverter must be turned off first to prevent an automatic switchover that hits the batteries under heavy load.1:45 A coffee grinder can run briefly on the inverter; sustained high-draw appliances cannot.2:06 The 220V circuit on a Lagoon 42 is wired directly to shore power or the generator only — not through the batteries — which protects the bank from heavy loads.2:49 When connected to shore power, only one or two circuits should be active, not all simultaneously.3:19 Always confirm the inverter is off before adding any high-draw device to the circuit.2:55
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