Great news for operating on DC current with the new battery technologies!
Our 12 and 24-volt units are a great choice if you are OK with operating them when the engines are running or plugged into shore power. If at anchor with the engines off you will probably want a small generator to keep the units running for any appreciable time if you don’t have a large battery storage capacity.
For smaller recreational applications, we usually recommend you consider a small (2,500+ watt) portable generator if one wants to operate the air conditioner overnight. It’s extremely important to avoid carbon monoxide poisoning, somewhat limiting the possible locations where the generator can be placed, and we always recommend the use of at least one high-quality CO detector on board!!