Tuesday, August 5, 2014

Correct Measurement Of Import / Export Using Ausgrid's TOU Meters

Metering Makes BIG Differences In ROI
We are happy to see Ausgrid's online metering information now removes any ambiguity regarding the best import / export electricity meter, for correct / beneficial output towards the end user.

Ausgrid's report states the following,

Where net metering is installed to record bi-directional energy, the metering equipment used by Ausgrid registers the addition of the instantaneous power flows in each phase.

In three phase installations this is particularly important where a single phase embedded generation system is installed.

The following example illustrates how the meter will record energy.

If the following, unity power factor current is flowing through the meter,

  • A Phase 8 Amps consumption (1.84kW @ 230V AC)
  • B Phase 12 Amps consumption (2.76kW @ 230V AC)
  • C Phase 7 Amps generation (1.61kW @ 230V AC)

The resultant power flow registered by the meter would be,

+1.84kW + 2.76kW – 1.61kW = +3.0kW towards the premise.

The above statement should now help anyone whom is thinking of installing solar, from falling into some of the past traps,

  • Incorrect metering installed resulting in reduced electricity offsetting
  • Incorrect metering installed resulting in increased exporting of power
  • Being sold a larger three phase inverter because the home is three phase, when a single phase matched to sunny hour usage would have done the job, with the correct poly-phase meter installed

Visit our Solar Power pages to see more of Ausgrid's statement and also learn more about NET FIT METERING & BILLING and the TYPES OF NET METER. Knowledge that will certainly help you maximise your solar investment.

This blog post brought to you by Aussie Home Energy, a major player in the HOME ELECTRICITY SAVING SERVICES industry in Australia.
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