Fact: Solar panels work in sunny, cold, and even cloudy environments. The technologies of solar panels allow them to work effectively and efficiently and are even more effective in cooler temperatures than warmer ones. In addition, cloudy weather does not inhibit the efficiency of solar panels; they can be a viable source of electricity as they can still produce enough power. Even cold, sunny winter days generate a comparable level of electricity to what you would get from hot summer days. Examples of countries where such systems are efficient are Germany (world leader of solar panels), the UK, China and Italy.