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Old 04-08-2019, 09:06 PM   #1
Join Date: Dec 2007
Posts: 3
Magnum MS 2012 Inverter

Does anyone know how to prevent this inverter from temporally going into invert mode when connecting to shore power? I believe this is whats causing my boat to trip the shore Ground Fault Device. I was thinking of temporally Disabling the Neutral-to-Ground Connection via a switch until unit goes in to shore power mode. The unit has a butt connector for this. I would be unprotected for a few second. This is documented on page 41 in the owners manual.


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Old 04-08-2019, 11:13 PM   #2
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 7,958
Pretty simple fix. The new GFCI dock wiring can create a few new issues.

Do you have an inverter bypass switch? If yes, use it. If no, install one. With this switch you can then figure out what breakers to turn off before plugging into shore power to avoid the trips. Worked for me anyway.
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