Disconnecting battery cables for winter lay up

Walter, thanks for the comment.
If I did not visit the boat every couple weeks, I would probably also disconnect the batteries. In my younger days, I used to remove the batteries and take them home for periodic charging. I have a Silverton 422 with numerous circuit breakers on a panel in the bilge which I used to shut off before I visited the boat so often. I believe this will shut down everything. Even then, I still visited the boat and occasionally charged the batteries after activating all the battery switches and turning the circuit breakers back on.

The best action depends on your personal circumstances, I have a shore house near the boat which we visit almost every weekend even in the winter, and the yard allows us to keep the boat plugged in for the day. The strategy was different when I had to spend 2 hours to get to the boat.
 
I appreciated the time for folks to post the above replies and hopefully a number of other boaters who also need to prepare their boat for winter storage will have some additional information to decide how they wish to manage their boat batteries for storage.

As always, I did turn off all breakers and battery switches, but this year I did disconnect the four batteries positive leads, wrapped the end of all individual positive battery cable ends in a foam insulation tube and wrapped electrical tape around the foam. I sat each positive battery lead down in an area where I thought contact should not be made with any ground source. Hooking batteries back up in the spring will be easier and quicker and I would hope this would still be considered a safe approach as described. Thanks. Now hopefully this week my boat gets shrink wrapped.
 
Kev,
Previous boat was a 2004 Silverton 34/36C, two 30 amp cords and kept it plugged in during the winter, kept charger on and was good to go. The 45c needs crazy power and where they place me I don't have that crazy power. Hence I remove the the negative leads on both battery banks. FYI, I have never removed the batteries from a boat, the batteries on the Silverton 45c are huge and very heavy. The 34/36c were regular size and weight, kept them in the boat, kept the charger on and all was well. Those batteries were cheap, 100 bucks maybe each? 5 years and I would replace them. I forget the price of the batteries I have now, but they are expensive.
 
Walter,
I don't know what you mean by crazy power, but I have 50 A 220/250 outlet on my 422 and when I purchased it new, Comstock had it plugged into a single 30 A service via an adapter. Both sides of the power on the boat were active which surprised me.

While I used the 50 A outlet in the marina during the summer, I bought the same adapter for use at my home later and plug into a 30 A outlet. In winter storage where 15/30 A is available, I use a second adapter which goes from 30 A to 15/20 A to charge the batteries, run the sweeper, etc. in the winter.
 
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