: Why don’t all buildings use solar panels on their roofs to generate electricity?

Question

: Why don’t all buildings use solar panels on their roofs to generate electricity?

In: Technology

Answer 1

Until recently solar panels were expensive and not efficient. Almost all buildings were built before you could recoup the cost of the solar panels. And even now it is a gamble as energy prices changes and the solar panels might get damaged. In some areas you might expect to recover the cost of the solar panels in ten years, in others never. And even if you should expect to get the money back for the investment you still need the money to buy and install the panels which not everyone have.