Obvious questions:

I assume you have GFI outlets and not a GFI breaker.

Anything else plugged in to that outlet when the computer trips the GFI?

Is anything else plugged into the laptop when the GFI trips? SSB? radio?
printer? NMEA stuff?

Have you tested the GFI with the "test" button?

Have you tried the laptop in other GFI outlets?

The only thing that is supposed to trip one is a differential current in
the hot and neutral wires. The unequal current is almost always because
the appliance has found an additional return path through its grounding
conductor back to the service entrance. If such a problem exists with
your laptop, it should be corrected. Alternatively, a new GFI outlet
might cure the problem.

Good luck!

Chuck

johnhh wrote:
All of my 110 outlets on the boat are protected through GFI. Whenever I plug
my laptop charger in or turn on the computer with it plugged in, it trips
the GFI. If I reset it a time or two or three, it will hold and work fine
until the next time. Interestingly, it will even trip the GFI on a parallel
circuit. I am guessing that it has something to do with the large capacitor
in the charging unit charging up. Does anyone have an explanation and/or
solution?

thanks
john