Electrical Engineering - Calculate kwh/year

You'll need to provide more information about usage.

What is "8$/unit"?

You will pay the same thing-meter reads KWATT not KVA.

PF value does not make any difference.

2300kw x 365 days x 24 hours = 20,148,000 kwh.

If the unit cost is US$8, then 20,148,000 x 8 = $161,184,000....

Somehow I doubt this. For one thing, the more likely unit cost is 8¢. If so, your bill would be $1,611,840. Not only that, but you might not be using the 2300 kw all of the time.

You need to find out whether and/or how much your utility charges for low PF. Then you can calculate how much you can save by improving the PF. The data so far are inconclusive.