Seems like there's a bug with Stargate power units. They are supposed to act like a buffer, completely replacing naquadah as energy source. However, with an RF Stargate Power Unit attached to stargate, OC interface (sg.energyAvailable()) shows, that gate stores only about 50000 energy, while the amount of energy required to travel to Nether from Overworld is, in my case, about 71000 (sg.energyToDial()). This bug renders power units completely useless in inter-dimensional travels.

BTW: this doesn't look good:

BAH.... This slipped through my testing. I had fixed this in a code that I didn't commit a week ago and forgot to circle back.

I'll fix later today.

Fixed in 1.15.2 for both forge and api 7 versions.

Available here: https://ore.spongepowered.org/Dockter/SGCraft/versions

I'm afraid this issue isn't fixed yet. Energy requirements to travel between dimensions are still too great: RF power unit can't store enough power to establish a connection. Maybe you could increase power unit's capacity to about 8 000 000 RF, so it can be used for inter-dimensional travel (on default configuration).

I am still tweaking this section after yesterdays re-write of the zpm implementation.