Insights
![Dazzling ray of sun, seen through a red rock cavity, dances across a barren landscape at sunrise.](/files/live/sites/isoorg/files/news/News_archive/2021/10/Ref2738/Ref2738.jpg/thumbnails/300x300)
on
The power of the sun
ISO standards bolster confidence in an expanding solar energy market.
![Emosson hydroelectric dam and lake surrounded by rocky landscape, in Switzerland.](/files/live/sites/isoorg/files/news/News_archive/2021/03/Ref2648/Ref2648.jpg/thumbnails/300x300)
on
The power of water
ISO offers guidelines for the development of small hydropower plants - a great solution for supplying electricity in remote rural areas.
Top standards
Standard
ISO 9459-2:1995
Solar heating
Domestic water heating systems
Part 2: Outdoor test methods for system performance characterization and yearly performance prediction of solar-only systems
Standard
ISO 9459-5:2007
Solar heating
Domestic water heating systems
Part 5: System performance characterization by means of whole-system tests and computer simulation