Angle of dangle

[saumur]

Hi

I am about to replace the batteries in our new (to us) yacht.

I have read lots on the forum and have decided that unsealed wet deep cycle is the way I want to go - Trojan I think.

One advantage is that the maintenance schedule may encourage me to 'engage' with looking after the battery rather than fitting and forgetting as I do now.

One thing that concerns me is any acid spillage so my question is how much angle of heel has the boat got to have before they may overflow?

They are mounted around 3' outboard of the centreline and although we are a cruising boat we occasionally like to 'play' and sail overpressed on our ear (where does that expression come from?).

I have read that these discharge at around 1% per day. I assume if I install a medium powered wind generator (Rutland 903) this will be enough to maintain them during the winter when we do not visit the boat for 4 months (I am thinking of 4 x T105's - 450ah @12v).

TIA for any advice.