Incorrect FOM Unit Conversion in DEA technology catalogue v9 for Pit Thermal Energy Storage

[TomKae00]

Checklist

• [x] I am using the current master branch or the latest release. Please indicate:

Describe the Bug

As of today, April 9, 2025, DEA technology_datasheet_for_energy_storage version 9 contains an error in the FOM values for pit thermal energy storages. In version 9, the FOM is increased by a factor of 1,000 compared to version 8. However, the tech brief (https://ens.dk/media/6445/download) that outlines the changes from version 8 to 9 clearly indicates that the FOM should decrease by 19%. As a workaround, I manually adjusted the FOM in the compile_cost_assumptions.py to the correct unit (€/MWhCapacity/year).

Data Sheet Links:

Version 9: https://ens.dk/media/6446/download Version 8: https://ens.dk/media/3417/download