Answer:
The statement "in summer time the sun sits above the horizon sky" means that the sun is higher in the sky during the summer months than it is during the winter months. This is because the Earth's axis is tilted on its orbit around the sun.
A fixed tilt angle of 90° means that the solar panels are perpendicular to the sun's rays. This is the ideal tilt angle for solar panels in the winter, when the sun is lower in the sky. However, in the summer, when the sun is higher in the sky, a fixed tilt angle of 90° will result in a lower energy-output value.
This is because the solar panels will not be able to capture as much sunlight. The sunlight will be hitting the solar panels at a glancing angle, and not as directly.
To maximize the energy output of solar panels in the summer, the tilt angle of the solar panels should be adjusted to match the angle of the sun. This can be done automatically using a solar tracking system.
Step-by-step explanation: