How do you have the integral sensor set up? If you don’t have that set up properly, you’ll get bad results.
EDIT: In case you respond and I don’t see it.
If you are always consuming power (above 0) and it has rolling consumption like a sine wave use the default value (method: trapezoidal).
If your power drops to zero for extremely long periods of time and spike very high (like a square wave), use method: left.
I’ve never found a good use case for method: right.