Pacific Yacht Systems · video

What this video covers

Installing a dedicated DC-side service disconnect switch for an inverter/charger is a critical safety requirement for boat electrical systems, regardless of manufacturer manual specifications. Relying solely on an inverter’s internal software or remote control panel to shut down AC output creates a risk of accidental activation during maintenance. A physical DC disconnect switch provides a positive, mechanical break in the power supply, ensuring the inverter cannot generate 120-volt AC current while a technician works on the boat's electrical panel or outlets. This practice mirrors the standard safety procedure of disconnecting shore power before performing AC repairs. Jeff Cote of Pacific Yacht Systems emphasizes that because 120-volt AC systems carry lethal electrocution risks, boaters should treat the inverter’s DC power source with the same caution as a fuel shutoff valve. Installing this switch guarantees that no DC power reaches the unit, effectively eliminating the possibility of an energized AC circuit during service.

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