solar panel vs solar battery

solar panel and solar battery both are nouns.

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

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

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

Other synonyms of solar panel include solar array.

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