Actually, I was wrong. I didn't consider that the prechargers will inevitably interrupt beams placed at higher elevations. Regarding a fusion plant, I built one in my 1.6.4 world. Building it was a great experience - actually using it, not so much because...well...I guess I've talked about that enough. Lubricant requirements and shutting down the plant are the issue, let's leave it at that.This leads me to want to go find out how many laser drills you can power off of a fusion plant. I have a dream about building one of those on SSP at some point.
Also, I think bees can do it, but I don't get into bees unless I'm using Gendustry, and that requires a crap load of power.