I have a similar issue (energy injected into the grid) except for every off hour that should be outputting zero, it outputs -1128. The output looks like this: Year Hour Output 90 0:00 -1128.1739 90 1:00 -1128.1739 90 2:00 -1128.1739 90 3:00 -1128.1739 90 4:00 -1128.1739 90 5:00 -1128.1739 90 6:00 -1128.1739 90 7:00 -1128.1739 90 8:00 72829 90 9:00 165092 90 10:00 258385 90 11:00 330807 90 12:00 311933 90 13:00 209167 90 14:00 133950 90 15:00 54034