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>My Seamaster 30 has two leisure 110ah batteries and >one 110ah for the engine, I think that over the years >the boat wiring as gone through a few incarnations. >When you switch on the ignition a small relay under >the dash clicks and joins the batteries but from what >I can see up under the dash it seems to connect a wire >from the ammeter to the main up lead from the leisure >batteries. The net result of this is that I loose a >volt when charging at the leisure battery terminal and >the batteries never receive a full charge. As a test I >put a tempory link between the batteries with the >engine running and checked the current on it(about 20 >amps) when the when the leisures batts were low and >found (as I expected) that this reduced as the >batteries charged up. I am after a quick solution to >this problem so I am thinking of fitting a 70amp relay >(30 amp alternator) with the contacts joining the >leisure and engine batteries at their posts, with the >coil fed from the warning light terminal on the >alternator the negative supply coming from the >switched side of the isolator. At a later date wnen >time permits I will disconnect the original >arrangement .Does anybody see any disadvantage to my >idea ?.

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