I looked at your data.
- If the ‘produced values’ are large , then your % differences are small .
- If the ‘produced values’ are small , then your % differences are large .
I think what you are seeing is that the CT clamps don’t measure that well when the current loads are low. They work better under a larger load. Maybe you should just compare values that are larger than 10.0
Also I agree with @kevin1. Plot the values on an X-Y axis using a linear regression and determine the R2 factor. See this older thread posted by other users who ran the same experiment. Don’t use the ‘% differences’ as a statistical guide. Use the ‘actual difference’ as your measurement. EXCEL can do all this for you.
How Accurate is Sense vs. Utility Metering? - Data Analysis - Sense