Metering a split-phase solar inverter with one Current Transformer (CT) is supported with firmware version 1.37 and later. In this configuration, connecting a single CT to one of the two PV inverter output phases allows total power output to be calculated by software.

The single CT must be installed on the phase that corresponds to the same CT port on the meter (phase A or B).

It is possible to meter multiple split-phase solar inverters with one CT, if the solar inverter circuits are physically near each other:

1. Install both solar inverters with the same phasing
2. Group all conductors of the same phase together to pass through a single CT
3. As with a single inverter, it is important that the phase of this CT matches the phase of the voltage reference on the meter