Jan-18 21.56
Oct-17 20.30
Jul-17 20.72
Apr-17 21.39
Jan-17 20.20
Oct-16 19.13
Jul-16 19.27
Apr-16 17.68
Jan-16 19.50
Oct-15 20.35
Jul-15 22.41
Apr-15 20.87
Jan-15 23.29
Oct-14 25.28
Jul-14 25.68
Apr-14 25.73
Jan-14 25.65

平均 21.71c/kwh

现在21.56c/kwh， 其中Network Cost (Paid to SP PowerAssets) 是 5.3c/kwh， 开放后电商这部分利润会被挤压。
Energy Cost (paid to the generation companies) 是 15.84c/kwh。

ref
https://www.spgroup.com.sg/what-we-do/billing