solar panel is expensive in some countries because it lacks and it'll give a constant power supply in any household so solar energy is good electricity supplier when you have the money two by two regional one so the future is changing and no one is making use of plan that is known as electricity generator in his house. Because solar energy supply light without noise why generator supply light with noise pollution so people prefer using solar energy most at times Rich people
The problem is not with solar panels, but with the battery to store the electricity. The main issue here is that solar panels generate power only during day time. And the peak electricity usage comes in the night time. So there is a requirement to store electricity. And batteries that are needed here can be expensive, needs constant maintenance and need to be replaced every 3-4 years. And during the last one or two years, the battery prices have gone over the roof, due to the rising prices of raw materials such as Lithium, Nickel and Cobalt.