Mine is usually on. I have a good charger designed for 24/7 duty (http://promariner.com/products/dry-mount-marine-battery-chargers/pronauticp-series/) and a galvanic isolator to keep the zinc from being used by the neighbors. Sometimes in the summer I get lazy and don’t feel like stringing the shore power cord, so I’ll just put my 50 watt solar panel out instead. In the winter the shore power also runs a cabin heater and the telemetry system I use to keep track of the battery voltage and cabin temperature.
Joe Della Barba Coquina C&C 35 MK I
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