solar array vs solar panel

solar array and solar panel both are nouns.

Word	Noun	Adjective	Verb	Adverb
solar array	Yes	No	No	No
solar panel	Yes	No	No	No

As nouns, solar array and solar panel are synonyms defined as:

solar array and solar panel: electrical device consisting of a large array of connected solar cells

Other synonyms of solar array include solar battery.

solar array (noun)	solar panel (noun)
electrical device consisting of a large array of connected solar cells	electrical device consisting of a large array of connected solar cells