Thanks Main Sail. Of course thats a given, but the reason people get wind generators is to keep their batteries up when there is no sunshine on their solar bank. They are scared to go below 50% discharge.
I understand LiFePO4 can be fully discharged while at anchor
with no significant damage to batteries and, hey presto, when the sun comes out you recharge without anxiety. Furthermore any worries about being not able to start the motor because of not enough volts is immediately cured by a bout of sunshine.