The turmoil of the past five or six years has not always been pretty, but those players that have survived the economic, political and technological shocks are on a much healthier footing.

The outstanding feature of this turmoil has been the dramatic fall in the prices of solar cells and panels. As a result, annual PV installations have rocketed from less than 5GW worldwide before 2008 to about 40GW today and are still increasing rapidly.

However,