There is ample evidence of the enormous size of the potential market, and the tiny penetration of this to date. Solar home systems and lighting, including productive uses, shops etc, make up 65% of this. Grid-connected systems, such as PV in Buildings, also have a significant potential, as has been proved in countries where a partnership has been established between government and industry (e.g. The Netherlands, Germany, Japan) to increase market sizes whilst at the same time bringing down costs. Existing players are increasing manufacturing capacity, and new companies are entering the market.
In figure 3 it is shown in a graph the Electricity cost in (p/kWh) depending on the module cost (£/m2).