This dataset contains several useful components for Swiss Electricity system modeling: 1. High-voltage Swiss grid: 2019 snapshot of the high-voltage (>150kV) grid composed of : - Nodes: names, voltage, position. - Lines: ends nodes, resistance, power capacity. - Transformers: ends nodes, power capacity, resistance, tap ratio.

1. Hydropower topology : Representative description of Swiss reservoirs and plants (2019) composed of:
2. Plants: Lower reservoir, Upper reservoir, pump/turbine, debit, power capacity.

3. Reservoirs: Volume, altitude, position, canton.

4. Inflows into all the reservoirs: hourly time series post-processed from PREVAH model outputs from 2009 to 2019.

5. Wind production per node: COSMO-1 data processed and scaled to match SFOE annual production.

6. Solar irradiance maps projected onto tilted surfaces: hourly time series for 35° and 65° tilts, azimuth 180°. (same method as Frischholz, Y. (2025))

7. Processed ERA5 (historical), ECMWF SEAS5 (seasonal forecast) and ECMWF TIGGE (short-term forecast):

8. ERA5 Land: For inflow forecast model: historical runoff, snow depth, temperature and total precipitation per catchment (hourly, 2009-2019). For residual demand forecast model: historical temperature, u-v wind, ssrd per country (CH, AT, DE, FR, IT, hourly 2015-2019)
9. ECMWF SEAS5: For inflow forecast model: same variables as ERA5 (yearly forecast starting from every 1st day of every month in 2019). For residual demand forecast model: same variables as ERA5 (yearly forecast starting from every 1st day of every month in 2019).
10. ECMWF TIGGE: For inflow forecast model: same variables as ERA5 (two weeks forecast starting from every 1st day of every week in 2019). For residual demand forecast model: same variables as ERA5 (two weeks forecast starting from every 1st day of every week in 2019).

\ More details can be found on README.txt.