• High efficiency of between 70 and

• High efficiency of between 70 and 90 %, by far the best of all energy technologies.
• High capacity factor of about 50 %, compared with 10% for solar and 30% for wind.
• High level of predictability, varying with annual rainfall patterns.
• Slow rate of change; the output power varies only gradually from day to day, but not from second to second.
• It is a long-lasting and robust technology; systems can readily be engineered to last for 50 years or more.
• It can be integrated with fishing, drinking and irrigation water projects, in order to share the costs between different beneficiaries.