Help with whole house power monitoring (200amp/USA)

Ok so I change the scaling and I am now getting close to what I get with a clamp on amp meter. I also swapped the cables for one of the CTs and no longer getting a neg number. I also did not notice at first that the input from the CT is in Watts when show in the interface. Well this is a problem, That means you are taking the volts x amps which is fine but the interface is showing the wrong volts. I have the calibration = 110V and the interface shows 110 but the voltage is really 116-117 meaning the watts number is wrong.
What is the fix to get the real watts usage?

Bill to your point I am the sole home on a 25kva transformer so I cant use 200 Amps available continuously but where I have to place the CTs the wire awg is 4/0 AL. Between wire and insulation it just under 3/4 in so the only CTs that I could find that would fit was the 200amp.