Hi Steve,
I will try to answer your question, but I am a little unsure of your situation. Can you draw a schematic or block diagram? If the "it" in your second sentence is the battery, I don't see how it was causing all kinds of problems with electronics. Or was "it" the genset? Since there is no "real" ground in most boats, you don't "need" to connect the grounds of isolated systems together. However, you might want to in order to avoid confusion later on if someone not familar with your boat starts changing things or adding equipment.
Pat
--- In electricboats@yahoogroups.com, Steve Dolan <sdolan@...> wrote:
>
>
> Since I only got a "because" answer elsewhere I thought I would ask this question here.
> I dedicated a single battery from the genset. Before it was from my house pack and was causing all kinds of problems with the electronics on start-up. I isolated the ground and power only from the genset but was told I needed to combine the grounds. Since the Genset is used exclusively to charge the propulsion bank on long runs and the alternator is used just for the Genset battery. Why would the grounds need to be combined?
>
> Now I'm thinking of installing a Xantrex Echo charger to run from the house bank to the genset battery. Does there need to be a ground connected between the 2 batteries?
>
> Thanks,
> Steve
> 410SE Lagoon Electric Cat
>
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