36x36 tile solar array segments with accumulators and some empty space making the numbers 0-9 and letters A-Z, plus a few symbols. ~0.86 ratio for the whole thing, more or less depending on what you write. "blank" and "full" characters included after Z to help you even out your final ratio.
https://factorioprints.com/view/-L9i5YbpIL2sBKskFH6b
Blueprint String: https://gist.github.com/sparr/d4a4ffbd5 ... d12ac41059
Example (N):
