HPP Ajba
- Start of operation: 2008
- Watercourse: Soča
- Total rated flow (m3/s): 2,5
- Gross head (m): od 10,2 do 11,7
- Number of generators: 1
- Installed capacity (kW): 250
- Generator type: asinhronski
- Turbine type: vertikalna cevna
- Annual average energy production (MWh): 1400
- Output voltage (kV): 20