know issues:
Accumulators stop working when they are in the same power system of electrolyzers and fuel cell generators

Any way to fix that ?
It's realy annoying :(

Edit:
Found why, you put

generator.energy_source.usage_priority = "tertiary"

for electrolyzers and fuel cell generators, this category is reserved for batteries or accumulators with an input and an output, this make the power network not understand and break.
I know you want to make your machines on the last priority, but you can't like this.
Change the usage priority to "secondary" fix the problem .