No one has ever explained how the energy is suppose to come back to Earth in a non-crazy fashion. Until then, this will always come off as an impossible idea.
Yeah, we already have space-based solar power. It's called "The Sun". The best thing is, we don't even need to go to space to get it. The Sun beams the energy all the way down to the ground where we can easily collect it!
Reminds me of Sim City (I forget which one.. 2000?) where one of the power plants was a space based one that would beam the power down to a station. You’d then have a chance of getting a disaster where the beam “missed”.