Good friends took off on the Great Loop from here with a new similar AC portable ice maker by Magic Chef onboard.
So far, they absolutely love it and use it every time they stop for the night and figure it will pay for itself quickly. I believe they have the smaller version that can purportedly make up to 27 lbs on 24 hrs. I think the bin capacity is much less, so that assumes ice is removed.
It uses no water hookup, only AC from shore power, genset or batteries/inverter. Water (maybe up to a gallon?, dunno)is simply poured into the top of the machine and they use water from the FW tank or dock water , and they run it through a good filter. The only parts of the machine that is actually freezing or refrigerated are the freeze "pins" around which the ice forms elongated "cubes' after 7-14 minuts, depending on desired cube size the user sets. When the desired size is `accumulated, the rack of pins releases (with pin heat?)the cubes (with hole down the middle) into a slide into the insulated but otherwise uncooled bin compartment which acts rather as an ice bucket.
The machine stops making ice if it senses the bin is full. Eventually earlier ice will melt and drip down to be recycled into the water reservoir & make more ice if that earliest ice is not used fast enough. There is also a valved lower drain at the side so the sytsem can be emptied out when not being used.
It's just over 27 lbs. empty, and sits on a countertop. I think it was a little under $140 at one of the box stores like wallyworld or BJ's.
Here's the manual:
http://mcappliance.com/document/MCIM22TS.pdf The model number MCIM22 suffix , TS or TW just stands for silver or white color. There is also a somewhat larger model MCIM30TS & TSS(stainless).