what EU debate? The arrays are 1-to-1 EU on a per Solar Panel basis as you scale up. There is no need to debate.
I was going to say it seems a bit cheap but upon second look this looks fine to me. (missed the whole 8 MV needed for HV thing)
Can you get one block that does 512/tick? sure. Does it need a metric crapton of solar panel to achieve it? yup. Could you do the same without the new panels? yup but it would be "interesting" doing this by hand. So overall this seems pretty balanced to me.