The price of solar energy has dropped dramatically over the past two decades. Since 2010 alone, the cost of installed solar has dropped 70 percent. But how? And what does the future of solar look like?

As the cost of lithium battery packs continues to decline, technologies like the Tesla Model 3, Nissan Leaf and Tesla Powerwall are setting up the power storage unit for major growth in the coming years. So just how does it work?

Installing solar panels is a smart choice for lots of reasons, but there are some downsides associated with solar energy, too. Before investing in solar power, it’s important to consider both the pros and cons.