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TL;DR
The maximum power draw on laser turrets should be reduced to match its listed Max. consumption, and quality should not increase this amount.What?
Right now, laser turrets have a defined input_flow_limit of 9600kW, well over its listed Max. consumption, that being 1.22MW at base shooting speed and 3.86MW at max shooting speed.When a laser turret fires, here's the sequence of events related to its power:
- Turret fires a shot, draining its 801kJ buffer down to 1kJ
- Turret begins charging at 9.6MW (multiplied by quality, up to 24MW for legendary) until its 800kJ buffer is full
- Turret waits with its full buffer until it's ready to fire again, then repeats the cycle
- Shot fired, buffer empty.
- Turret begins charging at 800kW divided by the firing cooldown (1/1.5 at base, 1/4.8 at max)
- Buffer reaches capacity at exactly the same time as the firing cooldown finishing, turret can fire again
Why?
The Max. consumption listed on a laser turret is a straight up lie. Normal quality lasers have an actual maximum draw of 9.6MW, and that increases with quality up to 24MW at legendary. The average draw of a firing turret is certainly the listed amount, but other buildings on a power network don't care about average draw, they care about the draw right now.Consider this power graph:

Here we have 7 steam engines and an accumulator hooked up to a laser turret that's currently firing. 7 engines provides 5.4MW, which should be able to more than handle the laser's power demand, and have some left over for the accumulator. But as can be seen, the steam engines can't provide the 9.6MW the turret periodically demands, and the accumulator never actually has a chance to charge.
For most buildings, this isn't a big problem. A firing turret could potentially cause an assembler to run a little slower, which is definitely annoying, but not something that could break a build. But there are a few buildings that have little tolerance for power fluctuations. Two that come to mind are accumulators and combinators. The former can be seen in the above image, and carefully constructed combinator circuits can have their timings completely thrown off due to flickering power. In a tightly designed system with a careful power balance, such as a solar powered outpost or a space platform, this extra power draw can wreak havoc on systems that depend on a consistent power production, even when building enough power production to meet the alleged max demand.




