| Forecast year and month | Actual value/GWh | Forecast value/GWh | Relative error rate |
| July 2017 | 0.70 | 0.66 | 5.71% |
| August 2017 | 0.95 | 1.03 | 8.42% |
| September 2017 | 0.80 | 0.67 | 16.25% |
| October 2017 | 0.64 | 0.80 | 25% |
| November 2017 | 0.49 | 0.50 | 2.04% |
| December 2017 | 0.49 | 0.55 | 12.24% |