The newest technological creation from Google is the exascale supercomputer. It is set to completely alter the current outlook of computing space due to its almost incomprehensible computing speed of one trillion operations per second. This remarkable achievement, however, is shadowed by a critical dilemma: how will these systems be ‘powered’? The current energy generation ability is not suited to achieve the tremendous requirements of exascale machines, thus becoming a problem for the further advancement of computational systems.