You Do Need power plug adapter while traveling from Barbados to Canary Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Canary Islands are C, E and F and in Barbados are A and B. This is how they look like.

Barbados

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

Type A

Type B

Canary Islands

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

Type C

Type E

Type F