Protecting batteries from over discharge ?

[Alan de Enfield]

4 minutes ago, smileypete said:

So when the batteries get over discharged while you are away you get a text message from the boat. ?

But - better to avoid over-discharge in the first place.

 

Why / how would the batteries get over-discharged when you are away.

Personally, if I'm going to be away for a week or two the fridge & freezer are emptied and EVERYTHING turned off.

 

Our offshore cruiser was 'shut-down' early September when it was lifted out, it will most probably not be re-visited until May.

I expect the batteries to be still in pretty fair shape after 8 months 'sitting' and 'trickle charged' by solar.