Adding a "?" at the end as I am not sure if something this expensive is only suppose to transfer 20k RF/t max. I'd have expected higher. So, using AA Extreme Energy Relays or Solar Flux Reborn Ultimate Cables I can get, between the reactor and the Tier 7 Energy Sphere, close to 60k RF/t going into the sphere. I swap the AA Relays out for two Draconic Energy I/O (the draconic tier that is, the final tier until chaos is released) and now it's down to 20k RF/t into the sphere. Admittedly I had to do some jury rigging as Extreme Reactors don't support the Energy I/O natively yet (hopefully soon, I already brought up that issue on their forums) so I used a piece of Ultimate Cable (unlimited RF/t, like cryo fluxducts from 1.7.10 Thermal Ducts) between the reactor (and that made the energy tap light up green) and the Draconic Energy I/O. >.<

I connected a 20x20x15 Extreme Reactor to an Energy Pylon via Draconic Energy I/O Crystals into a T8 Energy Core and it was Transfering a lil over 157k rf/t no issues at all.

Can you show me your setup? The more crystals the energy has to go though the lower the throughput but for draconic tier crystals the throughput starts at around 30MRF/t.

On mine it stays red as well, but still transfers power

this is something not from DE but Extreme Reactors itself