If the cost per unit of solar electricity is equal to or higher than cost per unit of power station electricity it is not justified to install a solar plant. But the cost of power station electricity varies according to slabs of units used, so if large number of monthly units consumed lie in 8 Rs/unit and 12 Rs/unit slab then it may become justifiable always. Also the during electricity production CO2, NOx,SO2 emission becomes ZERO. And other charges fixed cost, tax, power factor etc. reduces to zero.
Solar PV system cost if grid connected is 70000 INR approx.
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