Case Studies / Hydropower


Alpiq, access to Switzerland’s second-largest hydropower portfolio.

Project Overview

Investment Year: 2019-2020
Target Ownership Stake: 33.3%
Technology: Storage, run-of-river, and small-scale hydropower plants1
Industrial Partner: Alpiq

The investment in Swiss electricity producer Alpiq (via the Schweizer Kraftwerksbeteiligungs-AG) includes Switzerland’s second-largest hydropower portfolio.

It consists of a variety of assets, including over 25 hydropower assets diversified over several drainage basins, ranging from small-scale to large storage systems. It symbolizes an important step in securing the future of Switzerland’s renewable energy supply in line with climate targets.

The total installed capacity of the plants is approximately 2900 MW, with a generation of more than 4 TWh per annum.

1Although this case study focuses on the Alpiq hydropower portfolio, the investment also includes other assets in Switzerland and abroad. The Swiss component is made up of more than 24 hydropower assets and two participations in nuclear plants. Internationally, the investment includes renewables and gas generation infrastructure (excluding coal).

The ideal addition to the Swiss investment group

Alpiq is a well-established Swiss electricity producer also active in energy trading throughout Europe. The investment represents an ideal asset for our clients by contributing to the security of power supply in Switzerland. The investment also supports energy storage needs, an increasingly important consideration due to the addition of intermittent energy sources such as wind and solar across Europe.

Hydropower is a key technology for CO2-neutral baseload power generation and much-needed flexibility

Hydropower is a crucial, attractive power supply option for a number of reasons:

  • Renewable, carbon-free energy resource that can contribute to sustainable development by generating local, typically inexpensive power
  • Reduces reliance on imported fuels that carry the risks of price volatility and supply uncertainty
  • Can offer multiple co-benefits including water storage for drinking and irrigation, drought-preparedness, flood control protection, aquaculture and recreational opportunities
  • Provides rapid-response power when intermittent sources are offline, and pumped energy storage when such sources are generating excess power – allowing more renewables, such as wind and solar, to be added to the system

In addition, hydropower is the predominantly installed storage technology globally. Its highly flexible nature will be required to stabilize the grid as Europe moves toward increased reliance on renewables.


Replacing hydro storage with batteries results in costs that are 2-3 times higher


Established technology with high technical maturity and extensive operational experience


Good start/stop flexibility – fast response time crucial for grid stability


Sizeable storage volume with long storage period; suitable for seasonal storage


High round-trip energy efficiency and very low self-discharge

Note (1): Mechanical energy storage includes various technologies; i.e. flywheel energy storage whereby a rotor spins at high speed, storing the rotational energy. Global operational electricity storage power capacity, mid-2017.