The chain of consequence effect.
Back in the summer during the brief phase of Captain Flashheart having a really shit milestone birthday (it's mid June if anyone feels the uncontrollable urge to spoil her this year) the battery charger decided to shit itself. And by shit itself, what we mean is, put up some error light that meant it no longer charges batteries but sits there doing fuck all in a cupboard. Thanks to Xantrex, you useless-bag-of-four-year-old-shite.
This means that plugging the shore power in will result in pretty much fuck all happening.