PowerDash automations detect potential problems with Current Transformer (CT) wiring, by comparing daily energy totals from the revenue-grade production meter with the non-revenue-grade microinverter daily energy summary. In a great many cases, this automation has helped system owners, installers, and REC brokers correct CT wiring problems that otherwise would have resulted in significant lost revenue.
The safest way to prevent these issues is to ensure that field technicians are using the Enphase Installer Toolkit mobile app to validate production CT wiring at the time of installation.
A view in this mobile app shows the per-phase power flow, which helps to diagnose wiring problems:
In addition, Enphase offers a detailed technical brief (PDF format) on how to check the health of CT wiring.