It is important to understand the factors that influence the performance of solar thermal systems as they can be an ideal way to provide extra hot water to supplement energy delivered by heat pumps or boilers. A solar system can therefore be designed to deliver hot water reliably and meet the requirements of the household. The amount of hot water provided by solar panels varies according to geographical location, the season, the roof orientation, pitch and inclination and the size of the panel and types of panel used. The UK receives 900-1200KWhrs of solar energy per m2 of land per year, a well designed solar thermal system can provide up to 60% of the typical hot water demand over a year and deliver 100% during peak summer days.
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