"'As what WFO said he is correct that n you aim for a PF of 0.95, and not 0.98, that will be twice as expensive and will take a long time to pay back for the extra costs."
I am in total total disagreement with this statement. First of all you don't know what it will take to improve the PF from .95 to .98. and secondly you don't know the penalty charge per KVA. I've done a number of these and return on the investment is as little as 1 year to 3 years. That's not too shabby
