Energy converters allows us to convert the energy of one mod into the energy of another mod. As you may know, if you have tech and tech mods installed, some mods are designed to work with one power source and some with others. This is a problem, as it requires us to create multiple energy generation systems for items in each mod.
With this mod installed we will be able to have a single energy generation system, since the machines that this mod adds will allow us to convert one type of energy into another type of energy. For example, with this mod we can convert Redstone Flux to Tesla or IC2 EU, and the same in reverse, if necessary.