Lagoon 380, Lagoon 450 and Saona 47:
These yachts have an inverter which allows for a 220V plug that can accommodate items up to 350 Watts. There are plugs in each cabin, but you’ll need to bring is a standard Southern European outlet adapter.
There is a USB plug available in the main saloon (via a 12V cigarette lighter outlet) for charging small electronics like phones. The Saona 47 also has a USB outlet in each cabin.
Items such as a standard hair dryer require too much wattage and can only be used when the yacht is plugged into shore power.