It is a solar array with a ratio of 21 accumulators per 25 solar panels. There are 2 blueprints one as 1/4 of the whole grid (1,5 MW 21:25) and another as a whole structure consisting of 84 accumulators and 100 panels (6MW) + a drone station.

Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
It is a solar array with a ratio of 21 accumulators per 25 solar panels. There are 2 blueprints one as 1/4 of the whole grid (1,5 MW 21:25) and another as a whole structure consisting of 84 accumulators and 100 panels (6MW) + a drone station.