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Switzerland: Current CO2 Tax Does Little to Help Solar Thermal

Submitted by Baerbel Epp on November 16, 2017
Oil price chartThe solar thermal market in Switzerland has been shrinking for the past years because of increasing competition from photovoltaics and heat pumps. Additionally, the low oil price has led to a wait-and-see attitude among potential customers. The market continues to show no signs of an upturn despite the introduction of a CO2 tax on fossil fuels around 10 years ago. This tax, however, has done little to compensate for the one-third reduction in oil prices in 2015 and 2016. A more suitable alternative would be a levy linked to oil and gas prices.
Source: Swiss Federal Statistical Office

Switzerland implemented a carbon tax on fossil fuels for heat supply in 2008. It was set at Swiss Franc (CHF) 12 per tonne of CO2, which was only 2.3 % of the then-average oil price for end consumers incl. VAT (see the table below). To achieve the expected reduction in fuel consumption, the government has increased the tax over the years and in 2018, it will be 8 times (96 CHF/t of CO2 = 82 EUR/t of CO2) what it was in 2008. Burning 1 litre of heating oil produces 2.65 kg of CO2. At a levy of CHF 96 per tonne of CO2, this leads to CHF 25 per 100 litres. The table shows that the tax raises the end consumer price by as much as 30 %, although it is still considerably below the most recent peak levels found between 2012 and 2014.
No levy has been imposed on biomass – as it is considered a carbon-neutral technology – and motor fuels, such as petrol and diesel. Some companies, for example, in CO2- or energy-intensive markets, are exempt if they commit to reducing emissions or participate in the emissions trading scheme.






Carbon tax

12 CHF/t of CO2

84 CHF/t of CO2

96 CHF/t of CO2

120 CHF/t of CO2

Tax per litre of heating oil (1 litre = 2.65 kg)

3 ct CHF/litre

22.3 ct CHF/litre

25 ct CHF/litre

31.8 ct CHF/litre

Annual oil price average for end consumers incl. VAT (6,000 to 9,000 litres), including carbon tax

108 ct CHF/litre

69 ct CHF/litre

79.9 CHF/litre
(Sept 2017)


Proportion of carbon tax based on average oil price

2.8 %

32 %

31 %


Carbon tax per kWhth produced from oil

0.3 ct CHF/kWh

2.23 ct CHF/kWh

2.5 ct CHF/kWh

3.18 ct CHF/kWh

Impact of CO2 Tax on heating oil prices for end consumers in Switzerland,
Note: ct = centimes
More effective taxation?
“From 2008 onwards, the CO2 tax introduction and high oil prices had allowed for strong growth on the solar thermal market, but then people got used to both,” said David Stickelberger, Managing Director of Swissolar, the national solar industry association. “In 2013, photovoltaics became competitive and oil prices went down. Consumers lost interest in solar thermal. It was rather a psychological effect than a real economic issue.”
The carbon tax could be more effective if linked to the market price of oil and gas: “That would be a good solution to counter the price fluctuations of conventional fuels,” said Stickelberger. “These fluctuations are one of the worst enemies of renewables because consumers think: ‘We’ll wait and see whether the price goes down again’ and they won’t invest in solar.”
To have a meaningful impact on the market, the tax needs to be much higher than it is now. The current maximum legal tax rate is CHF 120 per tonne of CO2, which translates into 3.18 centimes per kWh (see the table above). Stickelberger is convinced that this is not enough, as solar heat prices in Switzerland are fairly high, between 15 and 40 centimes per kWh. To achieve competitiveness with the most cost-effective applications a tax of 240 CHF per tonne of CO2 would be necessary, which is twice as much as the current maximum tax rate. Therefore the new CO2 law, which is discussed in Swiss parliament next year, should propose a new maximum CO2 tax level. 
The article was written by Riccardo Battisti, a solar thermal consultant and market researcher working at Ambiente Italia (Rome, Italy).
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