How many solar water heaters (SWH) have been installed since October 2010, as part of the Government's one million SWH roll-out by 2014 NW1735?
For the period 01 October 2010 to 31 May 2011, 78 669 solar water heaters (SWHs) were installed as part of the Government's one million SWH roll-out by the end of the 2014/15 financial year.