If you check that there is no continuity between the AC grounding (green/yellow) and the charger case AND there is no continuity between DC -ve and the charger case then it may be OK to connect it to the boat bonding. I would agree that the safest bet is to not connect the charger case to anything.
The article that Bill Kinsey provided a link to is very good. Interesting that it says "Do you have wires attached to sea cocks with hose clamps? Forget it. This is putting stainless and copper together, which are galvanically incompatible and it won't work" - I found Amel had done this on a cock I changed under the holding tank in the forward head at the weekend.
Good advice, Kent.
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On May 30, 2016 5:09 PM, "Kent Robertson karkauai@... [amelyachtowners]" <amelyachtowners@...> wrote:
I would not connect anything to the "grounding" screw for now. It should work fine. If you think there might be a problem with the charger before you can find a qualified electrician, check with your multimeter for voltage between the case and the engine block before you touch anything that might give you a shock...or better yet, just charge with your engine until you find the right electrician.
My charger is NOT grounded to anything now.
I'm not an expert by any means, so please feel free to critique my advice, anyone.
Thanks friends for all details. But I'm not able to find a qualified electrician able to know the electrical system of an Amel boat, nor are able to figure it out myself. But I need to know if I have to connect somewhere the Sterling heart or not. Can someone tell me somethings in addiction to formal notice of Kent (thank you Kent) connect the host to the bonding system? Thanks Enio