I crafted 125 high powercell to create a 5x5x5 multiblock powercell but it create huges lags in the game, Skipping ticks half the time, and less than 5 fps on the rest.

I let 20 and there is no longer lag (just normal pc lag but thats my config).
If i reconnect together again but in line it huge laging.
If i place all 125 but not all together it not lagging (by 10-20 cube/cluster)

I will use this last solution but if it can inprove the mod for futur updates.

Minecraft 1.12.2
Custom Modpack based on FTB Revelation
RFToolsPower 1.2.0
Forge 14.23.5.2846

Yes, this may be a bit too much for it. Unfortunatelly this is not going to be fixed as I no longer work on 1.12

Ok. I make 6 unit of 22 High powercell (25kRf I/O) and it works fine, i make also a linked advanced powercell and it works also fine crosse dimension (RIP Tesseract). RFTools Mods are greats mods thanks for it !