Solar Prices Drop Exponentially for 30 Years

>FuturePundit blogs about projections for $2 a watt photovoltaics by 2010, which would be a reduction in cost of about half from today’s prices.

The interesting thing in this post for me is a link to an Earth Policy Institute page which shows an exponential decline in photovoltaic prices over the last 33 years, from $100 per watt in 1975 to $4 a watt today.

That’s a highly encouraging long term trend. It reflects a “cut the price in half” time of about 5 years, which bodes very well in the long term.

Lots more stats available at the Earth Policy Institute Solar Power Indicators page.