Assertion: solar cell | /r/HasProperty | exposed to element
Facets:
value: outdoors
type: LOCATION
value: in order
type: OTHER
Source sentences:
text: In order to last 20+ years outdoors exposed to the elements, such solar cells must be finished with a front sheet of a UV-resistant fluoropolymer or thermoplastic olefin rather than the glass used in conventional solar cells, which is comparatively inexpensive (citation needed).