What is a disadvantage of solar energy?

Solar energy is highly dependent on sunlight, which can be inconsistent due to various factors such as weather conditions, time of day, and geographic location. This dependence means that on cloudy days or during the night, the efficiency and output of solar panels can be significantly reduced. Consequently, solar energy systems often require backup solutions or storage systems, such as batteries, to provide a reliable energy supply when sunlight is not available. This limitation is a notable disadvantage compared to other energy sources that can generate power continuously and independently of external conditions.

The other choices mention aspects that do not apply to solar energy: it is a renewable resource, it can vary in cost depending on technological advancements, and it does not produce emissions during operation.