You Do Need power plug adapter while traveling from Solomon Islands to Antigua and Barbuda.

Here is Why You Need An Adapter

The outlet and plug type used in Antigua and Barbuda are A and B and in Solomon Islands are G and I. This is how they look like.

Solomon Islands

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

Type G

Type I

Antigua and Barbuda

In Antigua and Barbuda, outlets of type A and B are in use.

Type A

Type B