You Do Need power plug adapter while traveling from Balearic Islands to Greenland.

Here is Why You Need An Adapter

The outlet and plug type used in Greenland are C, E, F and K and in Balearic Islands are C and F. This is how they look like.

Balearic Islands

In Balearic Islands, outlets of type C and F are in use.

Type C

Type F

Greenland

In Greenland, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K