The only way...
That this kind of technology will take off is when we have automated/robotic space-based manufacturing capability, using materials obtained from either mining on the moon or the capture of a NEO. Preferably this would involve self-replicating robots capable of churning out solar panels without much human intervention. They'd also need to be capable of maintaining the arrays once built.
And transmission back to earth would be better done using some kind of tether rigged with superconducting cables - else the transmission losses just make the whole scheme even sillier.
Launching the equipment from Earth would be madness using our current disposable rocket technology. Better to spend the money on developing fusion, or building terrestrial solar arrays...