The main disadvantage of installing solar panels is their initial cost. The average figure used to be in the region of £10,000, resulting in homeowners waiting at least 15 years to break even. However, prices have decreased substantially, and now panels are paying for themselves in as little as four or five years.  Another disadvantage is the reliance of solar panels on good weather. In the UK, we experience many dull, cloudy days, and solar systems typically generate less electricity on those days. Solar technology is constantly being improved, and most panels on the market today—while less efficient on rainy days—still produce enough electricity for a family to be comfortable, with minimum reliance on supplied electricity.