As you can see on this nice graph, there has been a price drop for silicon PV cells from $76 to $0.36 per watt of output within a time frame of 37 years. This is very encouraging, even more so since this trend will continue for many years to come, making solar power ever more attractive!
More graphs on this topic will follow!!
For more information on this topic please visit the source at Bloomberg New Energy Finance as stated below the graph!