--- I seem to have neglected an important fact, sorry I've been sleeping poorly as of late. Still am actually... anyhoo my lame excuses aside; Shield Regen varies at higher tech levels by combining low-strength shields with high regen tech. I cannot math good at the moment, so I might update this later, but multiple shield generators recharge separately AFAIK. So two shield gens with 1 recharge per increment will recharge faster than one big one that recharges at 2 every other increment. As by the time two increments have passed, the two smaller ones will have made four units of shield power and the bigger one will have made... well two. You'd think they might be equal at a glance since both produce 2 total strength per increment overall, but the bigger one is actually producing less than the two smaller ones because combined they are producing 2 per increment rather than 1 per increment. Basically, don't forget that shield recharge is additive.
This is incorrect. If two shield generators have 1 recharge per increment, than another shield gen at the same tech level with twice the size will recharge 2 per increment. Not "2 every other increment" and I have no idea where that suggestion is coming from.
The mechanical definition for the shield recharge rate tech is that a shield of size H with regen rate R will recharge H*R points in 300 seconds. The actual strength of the shield is completely unrelated to this, and only affects the recharging time shown in the component summary which is simply how many seconds it takes to regenerate the shield completely. This varies because shield strength scales with size^3/2,
not because the regen rate isn't directly proportional to size (because it is).
Example: using Delta Shields tech level as a reasonable early/mid-game standard (strength S=2.5, R=regen 2.5, max size Hmax=20), with regen = H*R and strength = H*sqrt(H/10)*S), you would be able to design shields of the following specs:
Size 1: Strength = 1 (0.79), Regen = 2.5, recharge time = 120 sec.
Size 5: Strength = 9 (8.83), Regen = 12.5, recharge time = 220 sec (displayed as 216).
Size 10: Strength = 25, Regen = 25, recharge time = 300 sec.
SIze 20: Strength = 71 (70.7), Regen = 50, recharge time = 430 sec (displayed as 426).
You can confirm this exactly in the game, but my point is that the numbers reflect the mechanics as I am describing them. The only exception is if there is some effect from discrete values of partial shield strength as you regenerate, but AFAIK Steve has coded things under the hood so that these effects are not significant on average. Otherwise,
total shield regeneration is
only dependent on the tech level and the
total size of shield generators on the ship, there is no special effect to making the individual generators smaller or larger.