3 Phase current meter with SCT013 sensors

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sounds very good and with your accuracy of +/- 0.1 kw/h it is a very reliable value!!
very nice!!
did you change something on the sketch for the emontxshield to reach this accuracy?

to reach the accuracy i did some calibration. at first i had to adjust the voltage, therefor i plugin an energy meter and changed the voltage calibration factor till it fits to the value of the energy meter, then i plug in a water boiler to get a pure resistive load an measured this again with the energy meter and adjusted the phase shift in the sketch till it fits an i had a power factor nearby 1.00. I repeater this step with the boiler for all 3 phases.
Sometime i have negativ values on some phases with a small consumption during the day but the overall value is within the accuracy.

the calibration way is described on the openenergymonitor site in the building blocks area

ah ok, i see! thx for the explanation!