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Capacity of solar water heating (SWH) systems worldwide from 2009 to 2024 (in gigawatts thermal)

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Sources

Release date

September 2025

Region

Worldwide

Survey time period

2009 to 2024

Supplementary notes

Data are for glazed and unglazed solar water collectors and do not include concentrating, air or hybrid collectors.

Citation formats

Global solar water heating capacity 2009-2024

Published by ÌÇÐÄÆƽâ°æ Research Department, Sep 29, 2025

Global solar water heating (SWH) capacity stood at *** gigawatts thermal in 2024, a decrease when compared to the previous year. China is the world's biggest solar water heating market. Solar collectors, typically found on a structure's roof, are used to convert the sun's energy into heat, which is then used for heating water.

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