Googling suggests that global energy usage is estimated to be around 15 terawatts.
Using the most efficient multi-junction solar cells available - which can convert 30% of the light hitting them into electricity - we could generate that with about 6.5 million km² of solar panels: that's about 80% of Australia.
Out at Earth's orbit, it'd need to be 68 million km^2: about the area of the Indian Ocean.
I only get (15E12/1360/0.3) = 37 billion m², which is 190x190 km square or 36000 km². Little more than Taiwan, which looks as quite a little spot compared to the globe: https://en.wikipedia.org/wiki/Geography_of_Taiwan
Googling suggests that global energy usage is estimated to be around 15 terawatts.
Using the most efficient multi-junction solar cells available - which can convert 30% of the light hitting them into electricity - we could generate that with about 6.5 million km² of solar panels: that's about 80% of Australia.
Out at Earth's orbit, it'd need to be 68 million km^2: about the area of the Indian Ocean.