As a rule of thumb, 1 square meter receives about 1 kW of peak raw solar power when the sun is perpendicular. This should give you at least a rough magnitude of

As a rule of thumb, 1 square meter receives about 1 kW of peak raw solar power when the sun is perpendicular. This should give you at least a rough magnitude of the problem instead of trusting the hallucinations of your AI. Since you want to produce power all day, you would take about 20% of that to account for tilt variations and day night cycles, and another 20% to factor in cell efficiency. So with adequate storage, one square meter of solar can generate an average of 40W of continuous electrical power, 24h per day. Let's round that down to 25W to take into consideration outages and maintenance, bad weather, spacing between panels for personnel access etc. And there you have it 1GW/25W is about 40 square km with quite generous safety factors, an order of magnitude less than your AI figures. This is still a lot of land if you replace farmland with it, but still totally negligible compared with the millions of square km of hot desert the world has available for this use. For example, scaling this 400x, to cover for the entire US electrical consumption, is still "only" 16000 sq.km , or 3% of the area of the Great Basins desert in the US, which is one of the smallish deserts of the world compared with Sahara, Ghobi, Kalahari, Australia, Arabia etc. Of course, there is little economic sense to build such a mega-solar farm and pay the cost of energy transport. In practice, we are seeing distributed production taking the cheapest available land nearby.