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That's fair but the average person kinda knows how much (work/light/heat) a single AA battery can do/produce, but not what a substation can do.

I would posit that no person on earth has personal experience of 100 million AA batteries in a single circuit.

How many have personal experience with 150 MV?

Approximately the same but now you at least use units that make sense.

Can you convert that to marathons per fortnight for me?

It's about 102 kiloTesla marathons squared per forthnight. Dimensions are weird.

Well, now I have a goal!

However voltage does not tell you how much work a battery can produce.

*Release

It releases energy, and energy performs work. The OP however wrote produce.