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3 July 2012

Solar: final report on the pilot project on domestic solar hot water heaters

In June 2009 the pilot project ‘Domestic solar hot water heaters’ was launched to encourage the use of solar energy in the residential sector. Seventy homeowners answered and received financial assistance to cover part of the purchasing and installation costs of their solar equipment. Over one year, regular measurements were taken from 23 of these hot water heaters to collect information on solar hot water heaters in real use conditions. The Bureau de l’efficacité et de l’innovation énergétiques released today the final report of this pilot project.

Over the year, solar hot water heaters enabled an average of 40% of the energy required for the hot water needs of a home to be saved. Solar energy enabled a yearly average of 1,215 kW per household to be saved.

Panneau solaireThe results obtained agree with the studies already carried out on the subject. However, significant differences were noted from one place to another, the energy performance of the installations varied between 21 and 68%. These variations are explained by the use and different types of systems (size of the reservoir, amount of water consumed, etc.) The participants who used only a little hot water obtained a better energy efficiency ratio of their installation. All the participants who took part in data collection will receive a personalized report on the performance of their hot water heater.

The measuring and analysis as well as the different reports compiled during the project were conducted by Laboratoire des technologies de l’énergie d’Hydro-Québec. This experiment performed in real use conditions enabled data of a unique nature in Québec to be collected and could be of interest to solar industry professionals and the general public as well as university researchers. This new knowledge could also be used to ensure and support the development of the solar industry in Québec.

Rapport technique

To view the full report (only in French): 

Performance des chauffe-eau solaires solaire installés au Québec – Rapport final (PDF, 2 700 ko)






You can also view our helpful advice on solar hot water heaters.

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