OP, you should always include the title alt-text with an xkcd comic. Like so:

Getting the utility people to run transmission lines to Earth is expensive, but it will pay for itself in no time.

That number didn’t really seem enough to me. However, the solar luminosity is about 3.8×10^26 watts and the surface area about 6.1×10^18 m2, ie. 62.3 MW / m2. 8760 hours in a year times 62300 kW equals 545 million kW/h, at twenty percent efficiency times twenty cents each is $21.8 M/a.

The sun might seem to be really, really hot; but in fact, it is just quite hot and really, really big.

So, a Dyson sphere

I guess connecting the panels to the net is an issue for Infra?

it really sucks having direct links instead of images on mobile