Solar energy is the most abundant source of energy available on the planet, and it has been harnessed in the conventional form of photovoltaic (PV) cells for over half a century. The improvements in efficiency and reductions in hardware costs in recent years have resulted cost decreases of over 40% and have led to significant increases in installments worldwide. In fact, 29% of electricity generation capacity added in 2013 came from solar installments. But staying ahead of climate change will take more significant adoption of renewables. Fortunately there are still plenty of opportunities to continue driving costs down and encouraging more widespread deployment.