They have established on the show already that ZPM's draw their power from an artificially created tiny bubble universe inside the ZPM...
I imagine how it works is that this microscopic bubble universe is actually a full sized universe that is only tiny relative to us (spatially transcendent) and this universe contains trillions and trillions of tiny (relative to us) hamsters all running around on trillions and trillions of tiny hamster wheels that are connected to generators that make electricity...
I imagine how it works is that this microscopic bubble universe is actually a full sized universe that is only tiny relative to us (spatially transcendent) and this universe contains trillions and trillions of tiny (relative to us) hamsters all running around on trillions and trillions of tiny hamster wheels that are connected to generators that make electricity...