You Do Need power plug adapter while traveling from Sint Eustatius 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 Sint Eustatius are A, B, C and F. This is how they look like.

Sint Eustatius

In Sint Eustatius, outlets of type A, B, C and F are in use.

Type A

Type B

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