In addition, lack of domestic financing meant that the systems reached mainly the wealthiest rural population. Further, local firms did not engage in indigenous research or significant adaptation. It represents vibrant solar markets, with 150,000 units having been sold in 2004 and close to 300,000 in 2009 (REN21,2010). Yet, despite this relative commercial success, the industry has been plagued by quality problems (Jacobson and Kammen, 2007), owing to a lack of domestic expertise and capabilities as well as a weak regulatory framework. However, the development of the industry was hampered by the above-mentioned lack of domestic expertise.