We have a 2014 Jeanneau 44 DS, and I am amazed how the batteries deplete on a long sail, with just the electronics/radio/GPS/bilge running. I did a 10 hr trip last season and although the batteries weren't depleted I was happy to start the motor and charge a bit as we moved to a mooring. How do people do it leaving a boat on a mooring for extended periods? I notice not all boats on mooring have solar or wind generators set up. Do their owners come out once a week and check on them? What is a reasonable expectation of a battery maintaining the bilge pump alone? Weeks? A month?