Sun does not need Vitamins.
A bit of sun is good for you, it helps the body produce vitamins. A lot of sun is bad for you, it causes premature ageing of the skin and increases the risk of skin cancer.
Chlorophyll can not produce the food necessary without the sun.
The sun provides vitamin D.
Solar panels They are panels (any size you want) that make electricity from the light of the sun
yes
No, but it wouldn't do anything useful either. Plants produce their own vitamins.
Energy
the energy sun and stars produce is fusion.
The sun produce light and nuclear energy
B vitamins
You don't get any vitamins from the sun, but the uv light from the sun helps the body to make vitamin D.
no it just adds vitamin D