Hi Steve,
I don't know their reasoning behind the guideline, but this is what it says in the Grounding section of the ABYC TE-30 - ELECTRIC PROPULSION SYSTEMS:
"GROUNDING
The boat's propulsion electrical system (e.g. batteries, generators, inverters) should remain isolated from the boat's grounding system.
Non-current-carrying conductive parts of the propulsion system (e.g. motor case) should be tied into the boat's grounding system per ABYC E-11, AC & DC Electrical Systems on Boats."
In this description, I assume that the house DC system is tied into the boat's grounding system per ABYC E-11.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, Steve Dolan <sdolan@...> wrote:
>
> Hi Pat and Eric,
> Sorry guys I didn't get back sooner, was in Boston for the birth of our first grandchild for a few days. Another swabby in a few years. :o)
>
> If I got this right your both saying that I have to interconnect the 2 separate grounds to the one ground from the Echo box which kinda made sense from the start. The reason Pat I need a separate charger when the Genset isn't running is a parasitic voltage gauge that's in the control circuit of the Genset. Once the Genset is running the Alternator will top off and maintain the charge of the 1 battery. See attached drawing.
>
> Eric,
> Educate me, why does the Propulsion bank need an independent ground?
>
> Thanks for the help guys,
>
> Steve in Solomons MD
> 410SE Lagoon Electric Cat
>
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