In other words, expected average O&M costs fell by 50% from 2010 to 2015, and again by 20% from 2015 to 2020. Finally, looking at the LCOE at a 10% discount rate, the LCOE for large solar PV decreased from USD 1031 per MWh to USD 667 per MWh and then to USD 175 per MWh, i.e. it decreased by one-third from 2010 to 2015, then by three-quarters to 2020. Therefore, the anticipated costs of large solar PV have “plunged” by more than 80% from 2005 (see NEA/IEA, 2005) to 2015 (see NEA/IEA, 2015).