I keep my Bristol Channel Cutter on a mooring in Portland, and the cockpit and deck collect a lot of grit and dried salt over a week. Hauling water in buckets to rinse things down is getting old, and I am thinking about a cordless robotic pool cleaner as a way to handle a small washdown setup dockside.
The main thing I am unsure about is whether the battery and motor are sealed well enough for salt air and occasional spray. I would not be putting one in the harbor, just using it in a tub or basin on the dock to keep rinse water moving. Size and charge time matter too since I have no shore power at the mooring. Has anyone here tried a cordless unit for this kind of job, and did it hold up around saltwater?