[Constantin]

How about switching to AGM batteries? They discharge only 1-3% per month. As long as you keep them disconnected, they will be OK. Ours stay fully charged on the boat, all winter (Maine), during haul-out. In spring, they''re still full. That''s a big convenience! Furthermore, AGMs require no significant maintenance... but their initial purchase cost (for quality brands like Lifeline) puts them in the flooded premium class.

In my mind, the biggest question is if your boat is a leaker or not. If your bilge pump engages at all, then some caution should be excercised. You''d have to monitor how many Amp-hours it consumes on average, figuring that stormy conditions probably lead to increased leakage.

With the right batteries and a isolated system (as in the batteries do not suffer from stray currents) your system will only require a quick charge when you return to the boat. The intervals you mention (1-2 weeks) are OK even with flooded batteries as long as they are not needed for other duties (bilge, etc.) Just run the engine with a quality 3-step regulator/alternator and a little time later, your banks will be full.