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On a backfed PV installation (that is, an installation where excess solar production is fed back through a breaker on the main distribution panel to the utility) it is relatively easy to see the net import and export of power.

The eGauge can record network connection quality as a percentage value (0..100). This information is displayed on the Status page (http://DEVNAME.egaug.es/status.html) under "Connection Quality" by default, but historical values are not stored. Storing network connection quality as a register may be useful

The eGauge can calculate Total Harmonic Distortion (THD) on a given CT or voltage reference. Each THD measurement will use one physical register. To do so: Navigate to Settings -> Installation Under Registers, click the "Add Registers" button Name the register as appropriate Using the dropdown

By default, the eGauge will record Power registers as the "Net" (=) subtype. This means the register will record power flow in both directions. Positive readings will be graphed as a green line, and negative readings as a red line. However,

Although the eGauge uses power factor to calculate real power, the power factor values are not stored in the database by default. However, it is possible to create a register to track the power factor of either a single CT/phase

The eGauge can be set to record individual CT amperages as separate registers. Unlike power registers, amperage registers are absolute values (they do not change polarity to reflect the directional flow of current). To add amperage registers: Navigate to Settings -> Installation Under Registers, click

Voltage registers are configured in much the same way as power registers (the default register type on the eGauge). To add a voltage register: Navigate to Settings -> Installation Under Registers, click the "Add Registers" button Name the register as appropriate Using the dropdown menu, change