8,000 EU/t in Tekkit Classic w/ single-use batteries!

The MFSU at the end has exactly enough batteries to work 24/7 according to the calculations and by looking at it. I will make a single-use battery factory soon. The single-use batteries are luckily very cheap and you can craft 8 of them from one redstone dust, one hydrated coal dust and one copper cable. That's 16x more efficient than using redstone dust in MFSU's, and it also means you need 16x less items in the pipes feeding those MFSU's. :)