Almost every boat today has a voltmeter of some kind—either as a dedicated gauge or as part of a multifunction display. But voltage does not tell the whole story when it comes to marine battery status ...

In today’s boats, electric power rivals the importance of engine horsepower. Even the electronic control unit on today’s marine engines—that brain that makes outboards and inboards do what we want ...

A little over a a year ago, we covered an impressive battery monitor that [Timo Birnschein] was designing for his boat. With dedicated batteries for starting the engines, cranking over the generator, ...