Leave one panel in place to keep the batteries charged, power
ventilation fans and run the bilge pump
. Yes, the boat can fill up with water
when left on jackstands. Preferably leave it in a yard not prone to theft and pay someone to check on it at least once a month. Take the sails
off and store them inside, roller furlers in particular have a tendency to unfurl and cause problems.
If you have a lot of expensive stuff inside and are at high risk for theft get a storage
unit and put the expensive stuff in the storage
unit along with the cushions
which tend to get moldy even with ventilation. Strip the deck
down and secure things as though preparing for a hurricane
. Don't leave hatches partially open, water will get in for sure and so will thieves.