Three phase power and single phase solar inverters (Essential Energy)

Three phase power and single phase solar inverters (Essential Energy)

This is how franchise three-phase net meters (complying with the rules)
supplied by Essential Energy are configured:
      there are 3 ToU (time-of-use) registers for imported (supplied by the
      network to the customer) energy, of which one only is active at any
      time (note: for the purpose of this discussion, it can be considered
      that there is only one import register);
      there is one register for exported (supplied by the customer to the
      network) energy, active at all times;
      the NET energy is calculated as follows:
                NET = IMPORT phase A + IMPORT phase B + IMPORT phase C -
EXPORT phase A - EXPORT phase B - EXPORT phase C
        the above is calculated over very short periods of time (depending
on meter model), practically instantaneously;
      the net energy flow  is stored in the export register (for net
      export) or the active import register (for net import), as
      appropriate.

Here is an example (not very realistic) of how the meter behaves:



    Time     Phase A   Phase B   Phase C      IMPORT         EXPORT
   period                                                          register           register

     1            5 Wh        3 Wh         5 Wh           7 Wh                  0
                   import      export       import

     2             4 Wh        3 Wh         5 Wh             0                    2 Wh
                export    export    import

     3              0              5 Wh         5 Wh             0                      0
                                      export    import

     4              3 Wh       4 Wh         5 Wh           12 Wh                0
                    import      import       import

     5             5 Wh           0             2 Wh             0                   7 Wh
                    export                       export

                                                       TOTAL     0.019  kWh     0.009 kWh





The registers are read and the bill is then calculated by applying the
appropriate tariff to the totals.

I hope that the above makes clear that from a financial point of view, it
makes no difference whether the generation is on a lightly or heavily
loaded phase, or spread evenly across all phases, as the net energy is
calculated globally. Of course it is desirable to have phases balanced, so
it's highly recommended to place a single-phase generator on the phase
that's most loaded during the day.

The following document contains information on our three-phase meters,
including how to read the registers:
https://www.essentialenergy.com.au/asset/cms/pdf/contestableWorks/CEOM8014_50.pdf

    • Related Articles

    • What happens during a 'Black Out' or Power Outage with a Grid Connect Inverter

      Being a 'Grid Connected' inverter - a Blackout will automatically cause the inverter to shutdown. This is to protect the technicians who maybe working on the network/grid/power lines after the blackout.  If the inverter continues to show a fault code ...

    • SP Ausnet Info

      Customers > Electricity Customers > Solar Connections SP AusNet supports customers looking to connect a photovoltaic (PV) solar system at their installation within our electricity distribution network (across north and eastern Victoria). SP AusNet is ...

    • AusGrid Sizing and VRC requirements

      For any jobs that are 5kW (inverter and panels) or above they require a VRC. For any jobs that are 4.75kW panels or less no VRC is required. For any jobs that have a 3phase meter box, will require a 3 phase inverter to be installed (or potentially 2 ...

    • Time of Use Metering

      In Endeavour Infrastructure regions, we will now be sure to install a meter capable of changing to 'Time of Use' instead of the standard meter which does not allow this change. A new field in zohocrm potential page has been added under the Diamond ...

    • Country Code Setting for commercial inverters SMA

      2 8 1 2 8 AS4777.3 English No Australia