This docked reactor uses 2542 power reactor blocks in 41 different groups for a 763,149.7 raw energy per second. 300 energy per second per power reactor block is respectable but could be improved further [deleted upon request]. That said, the mass difference isn't that important as power reactors often accounts for less than half of the docked reactor total mass.
The power supply beam is a 1441:1441 cannon slaved power supply beam with the following stats.
tick rate: 50ms
cooldown: 2500ms
duration: 2500ms
power consumption: 43,230e/hit (864,600e/s)
power supplied: 34,584e/hit (691,680e/s)
At first glance, the power consumption per second is greater than the docked reactor's energy generation. However, [deleted upon request] the beam doesn't really fire 100% of the time reducing the average power consumption per second.
[deleted upon request]
In practice, this docked reactor supplied roughly 32.3 million energy in one minute (i.e.
roughly 540,000 supplied energy per second) [deleted upon request].
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Overall this generator effectively supplies roughly 97 energy per block which is a respectable amount for a reactor of this size (theoretically, most efficients reactors should be around 200 supplied energy per block, while most small box-like reactors range from 50 to 110 supplied energy per block).
If I could rate 4.5 stars I would, as this reactor is still very usable and reactors of this size aren't completely trivial to build. [deleted upon request]