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

Here is Why You Need An Adapter

The outlet and plug type used in Falkland Islands is G 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

Falkland Islands

In Falkland Islands, outlets of type G are in use.

Type G