At a minimum you will need an adapter. If your equipment (particularly battery charger) doesn't accept 220V you will also need a transformer. If your equipment can't accept 50 Hz (vice US 60 Hz) you can't plug in.
If you get your boat set up for Europe you will be fine in the Azores.
I recall availability of 16A 220V 50Hz at all the slips. I don't remember it being available on the bulkhead but I was rafted out until a slip was available so I may have simply not noticed. I don't remember seeing 30A outlets but I wasn't looking.
You can buy small transformers at Mid-Atlantic Yacht Services in Horta but they are limited. If you really have a 50A boat I would consider sourcing a built-in transformer before you leave and buying the appropriate pigtails in Horta. Even so you may find yourself a bit more limited in the Azores and Europe than when at the dock in the US.
If you get your boat set up for Europe you will be fine in the Azores.
I recall availability of 16A 220V 50Hz at all the slips. I don't remember it being available on the bulkhead but I was rafted out until a slip was available so I may have simply not noticed. I don't remember seeing 30A outlets but I wasn't looking.
You can buy small transformers at Mid-Atlantic Yacht Services in Horta but they are limited. If you really have a 50A boat I would consider sourcing a built-in transformer before you leave and buying the appropriate pigtails in Horta. Even so you may find yourself a bit more limited in the Azores and Europe than when at the dock in the US.