Seems like some rats live in it). This item produce(right section) some energy, instead of consuming(left section) "1kW" like in description. The green bar in "beacon interface" during big power consumptions at test purpose look like this "device" trying to send all energy on whole map, looks like "not enough power"(low input) and moving franzy from green to yellow, but energy reserve is sufficicent. I think this could even eat some fps/ups with "enough" beacons... May be it's could be like with belts - they work but not consume at all? Fix it, please!
And additional question - usage_priority = "terciary" or "tertiary"? :D
Well, anyway, thanks a lot for the mod, guys!
Couple of screenshots https://drive.google.com/open?id=1qvMnFnZ4ECHYJ0JykUMths_4xDkL9QqO

In reality, it's "tertiary" but in Factorio (until 0.17 is released) it's "terciary" because of a dev typo that isn't being fixed in 0.16 to avoid breaking every mod. So "terciary" is correct in the game until it is fixed to be "tertiary".

Super beacons don't really need power; the script gives them free power during operation. This has some side-effects (super beacons function as tiny accumulators that can provide a tiny amount of power each tick). This probably won't be changed in the near future.