Model FIT units - currently declared as exogenous RES - using flexible transformer units instead of fixing their output as currently done. Thus, the implementation won't differ from the remaining RES transformer units. This should not affect modelling results (as long as FIT units don't determine prices), but instead simply increase modelling consistency.
Problem description
See https://github.com/pommes-public/pommesdata/issues/102
Suggested fix
Model FIT units - currently declared as exogenous RES - using flexible transformer units instead of fixing their output as currently done. Thus, the implementation won't differ from the remaining RES transformer units. This should not affect modelling results (as long as FIT units don't determine prices), but instead simply increase modelling consistency.