Are solar energy costs going down?

Over the last four decades, the costs of solar energy products — in particular, solar photovoltaic modules — have dropped by 99%. That is quite a dramatic drop, and it’s even more dramatic to know that the costs we have right now will continue to fall in the years to come.

How has solar power changed over time?

Both are measured on logarithmic scales, and the trend follows a straight line. That means the fall in cost has been exponential. Costs have fallen by around 20% every time the global cumulative capacity doubles. Over four decades, solar power has transformed from one of the most expensive electricity sources to the cheapest in many countries.

Does solar cost a lot?

For more than 4 decades, each doubling of global cumulative solar capacity was associated with the same relative decline in prices. After several decades, though, the costs of solar photovoltaics (PV), wind, and batteries have dropped (roughly) exponentially at a rate near 10% per year.

How does technology affect the cost of solar power?

This states that the cost of technology falls consistently as the cumulative production of that technology increases. The chart shows the perfect example of this for solar power. This data comes from the International Renewable Agency, Greg Nemet, and Doyne Farmer & François Lafond.

Where did solar energy prices fall?

Other notable falls included China, Italy and South Korea, where the solar electricity price retreated 82%, as well as Spain (81%), Australia (78%), France (77%), Germany (73%) and the U.S. (66%). Emerging markets, too, have benefited from price falls. Vietnam, for instance has seen the solar energy cost fall 55% since 2016.

Will solar power fall more than 6% a year?

The average prediction was 2.6% annually. Not one single expert in the field envisioned that solar power would fall more than 6%. And then what happened? Solar power costs fell by 15% per year. Other technologies have seen similar dips in costs, too.