The electrical systems and their dimensioning are one of the most debated subjects during the preparation of an ocean-going yacht, and for a reason! Unlike a typical summer-cruising boat which at worst will spend few days far from a shore-power plug, an ocean-going boat will spend extended periods of total electrical self-sufficiency while powering a wider set of electrical equipment!
Fundamentally, all the fuzz about electrical systems boils down to two questions:
In a production-boat, the yard probably answered these questions already with a straight-forward solution: 2 Lead-Acid automotive batteries, typically around 100 Amp-hours (Ah) each, one dedicated to feed the on-board services ("House"- or "Service"-battery) and the other reserved for engine-starting ("Engine"- or "Start"-battery), and in the few cases when the boat will not be connected to shore-power during the night running the engine for an hour will do.
Too easy! On a seafaring boat there are a number of complications:
OK then, let's tackle the subject of
ELECTRICAL SYSTEM DIMENSIONING (batteries and charging
Last Update: 11/11/2014
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