[BUG] Sanity checks for home batteries fail

[nesnoj]

Task: sanity_checks.sanitycheck-home-batteries fails here, message:

...
  File "/some/path/code/src/egon/data/datasets/sanity_checks.py", line 1368, in sanitycheck_home_batteries
    cbat_pbat_ratio = get_cbat_pbat_ratio()
  File "/some/path/code/src/egon/data/datasets/storages/home_batteries.py", line 83, in get_cbat_pbat_ratio
    return int(db.select_dataframe(sql).iat[0, 0])
  File "/some/path/venv/lib/python3.10/site-packages/pandas/core/indexing.py", line 2371, in __getitem__
    return self.obj._get_value(*key, takeable=self._takeable)
  File "/some/path/venv/lib/python3.10/site-packages/pandas/core/frame.py", line 3868, in _get_value
    return series._values[index]
IndexError: index 0 is out of bounds for axis 0 with size 0

This is because the query

SELECT max_hours
FROM grid.egon_etrago_storage
WHERE carrier = 'home_battery'

in get_cbat_pbat_ratio() does not return any data for carrier "home_battery".
As far as I found out grid.egon_etrago_storage is filled in multiple tasks, the relevant might be storages_etrago.extendable-batteries in extendable_batteries_per_scenario? Also, I found this recent commit which changes the carrier name: aa75ad1

Do you have an idea what could be the reason for the missing data @ClaraBuettner @CarlosEpia ? (did the check fail at your end in your most recent run?)

[nesnoj]

@CarlosEpia could you pls have a look at the question above?

[CarlosEpia]

@CarlosEpia could you pls have a look at the question above?

During powerD we did not distribute anything to the MV or LV levels. Therefore we commented out all related tasks, including the distribution of home batteries. Once we merged all the developments at the beginning of reGon, all tasks were executed again and home_batteries_per_scenario() failed because there was no objective "battery" in the egon_scenario_capacities table. I think the carrier name in the sanity check should be "battery" instead of "home_battery".