Why is solar energy the best form of energy?

Answer 1

"Best" is debatable; sometimes other energy sources are more practical or more useful. Solar energy can be effective in areas where the weather is usually clear and where there isn't a problem in covering the surface with solar cells. Some examples would be roof areas in sunny climates, or in the desert where the land values are low.

Bad areas for solar would be in rainy climates or high latitude areas where the Sun is at a low elevation in the sky.

Solar power is also unsuitable as the primary power source for vehicles, as they are generally too small to collect enough power, and often need to travel at night or in bad weather when the Sun is hidden.

In general, there is no one "best" power source for every use.