Breaking the e/sec soft-cap

So I've recently started building a large ship with my younger brother, and what quickly became apparent was that with great mass comes greater energy consumption, particularly with the shield nerfs and need for bigger weapons. Within two super-efficient 41,41,41 block generators, we were up to 1.5M regen, but adding another only got me to 1.8M, and that's one hell of a fall-off for mass/regen trade off.
So after searching around for a bit, I gave up for the day, had a few shots and slept on...

Breaking the e/sec soft-cap