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Make sure the PV circuit is switched ON and has been ON for at least 5 minutesCheck that only L1 wires pass through production CT and the production flow is in the direction of CT arrow from PV to breakerMake sure that the blue and white wires are connected to the correct positions in the Gateway terminal blockMake sure that the wires running through the production CT only include PV generation (not any loads or storage)Ensure that correct phase ie L1(a), is going through production CTCheck L1 phase consistency using a digital meter and ensure L1 of PV circuits and L1 at Gateway are in same phase