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11.5 Solar Thermal 2010-2020

Key points from the IEA SHC data:
• IEA SHC collected data from 63 countries and estimated that all other countries represented 5% total
annual installed capacity.
• The total annual installed capacity was 62.5 million m in 2010, peaked at 77.5 million m in 2104 and had
2
2
decreased to 46.7 million m in 2018. This is shown in Figure 93.
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• China dominance of the market represented 78.3% of the total annual installed capacity in 2010 and
represented 82% in 2018.
• In 2000 ETC’s represented 79.6% of the recorded annual installed capacity and this decreased to 72.8%
in 2018.
• This decrease was a result of the decrease in the China market where in 2010 94% of the annual installed
capacity were ETC’s decreasing to 78% in 2018. In the ROW ETC represented 28% in 2010 growing to
37% in 2018.
• Calculations were undertaken of the total cumulative installed capacity allowing for systems being removed
after a specified number of years. This showed that cumulative capacity grew from 333 million m in 2010
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to 666 million m in 2018. This is shown in Figure 94.
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• Air collector heater data was collected from 19 countries with an estimate for the other countries. However,
6 of the countries only had data for 1 year and 4 others only 3 years. The 10 countries which had data
collected for most of the nine years included: Australia, Austria, Brazil, Canada, Hungary, India Japan, UK
and USA. Figure 106 shows the annual installed capacity of air collector heater panels from 2010 to 2018
for the data collected (and estimated). Note: 1of the dominant , the USA, did not have figures for 2010.
• The two dominant markets for the installation of air collectors in 2018 were: Canada (37.9%) and
USA(23.1%) .

Figure 93: Annual installed solar water panel capacity 2010-2018 broken down into ETC and FPC
Source: IEA SHC

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