The Transformer Upgrade is an upgrade added by IndustrialCraft 2. It's for machines that consume EU. With it, it increases the maximum energy of a machine by one tier. For example, putting one Transformer Upgrade in an Electric Furnace will increase the maximum energy input from 32 EU/t (LV) to 128 EU/t (MV), and so on.
Upgrades
Max Power
0
32 EU/t (LV)
1
128 EU/t (MV)
2
512 EU/t (HV)
3
2048 EU/t (EV)
4
8192 EU/t (IV)
The Transformer Upgrade is not very useful in IC2 Experimental, due to all machines ignoring their maximum energy input. However, it is best to use them anyway, for when that feature is restored.