> A 300W-solar power farm would require 1.5 million solar panels and cost approximately $300 million, provided the 1,500- to-1,800 acres of land needed was free

> A 300W-solar power farm would require 1.5 million solar panels and cost approximately $300 million, provided the 1,500- to-1,800 acres of land needed was free and the sun shone steadily, It's worse than that. Let's say you get 12 hours of steady sunshine every day. What to do the other 12 hours? For that you'll need storage. Therefore, you will need to double the capacity of the solar array so that during that 12 hours you can both store power and deliver power to people who need it. But then no power store is 100% efficient, so you'll also need to add more panels for that. But then you're never going to get 12 hours of steady power every day. You're going to have to increase storage and panels to account for that too.