The Envoy reads the CT secondary current to calculate production and consumption values.

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (A)

Current transformers provide the actual flow of AC current on the service conductors, and the Envoy uses that signal to determine how energy is moving through the system. The PV inverters report how much power they’re generating, while the CTs measure how much power is being drawn from or sent to the grid. By reading the CT secondary current, the Envoy can calculate the instantaneous power (using the line voltage and appropriate phase information) and then accumulate production and consumption over time. This lets the Envoy distinguish between energy used in the home and energy exported to the grid, giving you production and consumption values.