my average server room consumption is between 300 - 350 watts. According to an online calculator if a device consumes 400 watts and is on 24x7 then the result is 9.6 KWh
my calculated consumption from utility meter is 13.5 KWh peak + 6.4 KWh = 19,9 which is over two times over…
You appear to be feeding the utility meter with a power sensor (W). It actually needs an ever increasing total energy consumed sensor (kWh). It does not convert power to energy. It only observes how much energy has been used in the defined cycle. If you need to convert from power to energy, have look at the integral sensor. You can then use this in the utility meter.