Contributing less to pollution and more to sustainability are great reasons to buy a solar energy system. And let’s face it, seeing a return on your investment is a pretty nice incentive too. But how quickly can solar panels pay themselves off and how do you work it out? Let’s find out. To calculate your return on investment, there’s four main things your need to know: The cost of energy How much energy your prospective solar power system produces The cost of your system How much solar energy you produce will be consumed by your home – or more specifically, how much you will be sending to the