You Do Need power plug adapter while traveling from North Macedonia to Solomon Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Solomon Islands are G and I and in North Macedonia are C and F. This is how they look like.

North Macedonia

In North Macedonia, outlets of type C and F are in use.

Type C

Type F

Solomon Islands

In Solomon Islands, outlets of type G and I are in use.

Type G

Type I