GOT THE POWER?

摘要

This article began as a question from boater Val to our 'Ask the experts' column. But following Tony Brooks' initial response and request for further information from Val, it developed into something that we felt deserved an article of its own: a fully-worked 'real life' example of how carrying out a power audit can highlight shortcomings in an electrical system which at first sight might seem to provide adequate power and charging capacity... Val bought her boat back in 2012, knowing that the domestic batteries needed changing. But then six months after buying new ones (7 x 11OAh), performance started to decline again. An engineer confirmed that the alternator and cabling were fine, but the batteries weren't holding a charge - so they were changed again.