Weather Cover for External GPO

I have a double GPO/power point on an external wall in a courtyard at our home.  Even though it's designed to be weatherproof, it's still VERY exposed to the sun and rain.  In the interests of longevity, as well as protecting anything plugged into it, I designed this slip-on weather cover to extend its useful lifetime.

I printed it from white PETG with no supports, two perimeters and 15% grid infill.

The cover simply slips over the body of the GPO.