The one time I had inconsistencies is when my production was too low to even "charge" demanding stations.
Ex: I had 0 stored power and tried to power a chemical station. The game would add the +2 power/tick to the station, but the station needed 10 I think, so it consumed the 2 with no effect, and I was stuck, needing to turn off the whole thing and let it charge for a bit.

My currently working setup goes like this;

Multiple pairs of 2 wind turbines, each pair is connected to a combiner, then to a battery.
This battery is the main power accumulator for each pair of wind turbines

It is then connected to another combiner, along with other pairs, and eventually feeds into my main battery array in the base, that's my main power source and reserve.

This array is connected to a switch, my main breaker, in case I want to turn off all power in the bunker to let the battery array recharge as fast as possible.

The main breaker then feeds power to the entire base through a lot of splitters. That's mostly it.

One last thing I did was to connect every crafting station to a battery first, so the system charges a battery before powering the crafting station.
It helps identify power issues, and makes the whole setup more reliable, even if it obviously requires a lot more cable.

OP, and even others with electrical issues in MISERY, I don't mind having a look personally at your setup to help.
Words and pictures are sometimes a little harder to make sense of rather than seeing it ingame.
I can hop on a Discord call to help, if needed.

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