How much solar energy in term of Megawatt is required to use it as a commercial and how much will it cost?

Question

even in winter we are facing load shedding for about 90 minutes daily in Karachi. and in summer about 5 to 6 hrs daily

Answer 1

try this webpage : http://science.howstuffworks.com/solar-c...

very good for all solar energy questions,

Answer 2

it costs about 20cents (US) per kilowatt hour for large scale installations.