Panels installed outdoors need NEMA-rated enclosures to withstand weather, UV, and moisture

https://daltonyqkt636.fairmontdigest.com/posts/how-to-check-out-and-label-your-electrical-panel-like-a-pro

Panels installed outdoors require NEMA-rated enclosures to resist weather, UV, and wetness, guaranteeing long-term security and performance in extreme conditions.