I've inherited a Sterling Pro Combi Quasi Sine Wave inverter. https://sterling-power.com/products/pro-combi-q-quasi-sine-wave
I've been on shoreline for the past few days and was intrigued that although my leisures are running at around 13, my starter is at 12.
I've been advised that this is because the inverter isn't charging my starter battery - that'll only be done via the alternator when I run the engine.
Does this mean that even on shoreline and in a marina, one has to run one's engine to maintain the health of the starter battery?
And should I be concerned that my starter battery has been on 12V the past 3 days?....