Please forgive me if I misunderstood your posting. Are you suggesting to leave your boat in the water and disconnect the batteries?
You have approximately 650 amps at 24volts, thats a lot of pumping.
As the master of the vessel, beware the pitfalls of mitigated negligence, knowingly disconnecting your bilge pump when afloat.
Best address that question to your insurer.
Best wishes with you new boat.
Seafever of Cuan