as a result, large arrays of solar photovoltaics became a much less attractive investment opportunity for developers, especially for projects greater than 250 kw, so large field arrays such as these were less likely to be built beyond the 1 august 2011 cut off date, at least not until 2012, when pv prices reduced somewhat - a utility scale solar farm is paid 8.9 p/kwhr generated. at the end of 2011, there were 230,000 solar power projects in the united kingdom, with a total installed generating capacity of 750 mw.