It's probably a bug.
Mobile gates do not give (transfer) energy until they are charged.
Perhaps you need to reduce the charging priority of the built-in accumulators of all gates/teleports.

i'll look into this.
I never really noticed this, so i'll try to reproduce it.

Thanks for the report :)

so, actually after some test, it looks like it give power, but it's shared among all gates... i tried putting them as tertiary (like the vanilla accumulator) but it doesn't help...

i'll try some more test to see if I didn't do something wrong while changing

Maybe (greatly) reduce enegry storage in the gates/teleports, so it will be small buffers but not main energy storage? (like in the Warptorio)

yes thats a tiny bit annoying, one side has 364MJ/1GW, other side gets nothing

i'll reduce it in the next version (0.3.13) from 1GJ -> 100MJ for each gate