[Chester Stone]

I posted previously that I replaced by six house 8D (starter) batteries with twelve 6 volt deep cycle golf cart batteries. (model GC2).  My ProSine inverter is set to stop inverting at 10 volts, and provides power for 8 to 10 hours for essential equipment.  However, at 10 volts cutoff, the deep cycle batteries are still at about 80% charge.  It seems to me that deep cycle batteries should withstand more discharge than that.  I am a novice at this, but would appreciate any advise as to resetting my inverter to better utilize the deep cycle feature of these batteries.