Fronius Quick guide - LGC Metering with Fronius Smart Meter and Fronius Solar.web AU Technical Article [EN]

LGC Metering with Fronius Smart Meter and
Fronius Solar.web

Measuring PV generation and creating reports for large-scale generation
certificates

Quick Guide
© Fronius Australia Pty Ltd., RJT
Version 2.0/2019

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Introduction .................................................................................................................................................. 3

Calculating LGC........................................................................................................................................... 3

Setup for LGC metering .............................................................................................................................. 4

Options for LGC setup: .................................................................................................................................. 4

1. Monitoring via Fronius Datamanager box ........................................................................................ 4

2. Consumption monitoring and LGC metering with Fronius ............................................................... 5

Creating reports for LGC claims via Fronius Solar.web ......................................................................... 6

Create new report .......................................................................................................................................... 6

Report configuration ...................................................................................................................................... 7

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TLEG

=

Total power generated by the power station

FSL

=

Fossil fuel component of the power generated by the power station

AUX

=

Auxiliary power consumed during the production or maintenance

MLF

=

Marginal loss factor

DLEG

=

Eligible generation = TLEG – AUX (assuming FSL = 0)

INTRODUCTION

This Quick Guide outlines how the Fronius Smart Meter and Fronius Solar.web can be used to measure PV
generation. These measurements can be used to create large-scale generation certificate (LGCs) reports for
grid connected photovoltaic (PV) systems above 100KVA.

For general information on the installation and commissioning of Fronius inverters, Fronius Smart Meters and
Fronius Solar.web, please see our Fronius SnapINverter Quick Installation Guide.

CALCULATING LGC

The general formula to calculate LGC is below:

    󰇡    󰇛  󰇜󰇢

Where:

The Fronius Smart Meter measures this eligible generation data (including any auxiliary losses experienced
during the power conversion process and night-time usage) and extracts these values into a CSV file directly
from Fronius Solar.web.

To be eligible to claim 100% of the metered electricity generation (DLEG) for LGCs, both the meter and CTs
must meet a specific accuracy class and fall within a maximum allowable overall error discrepancy. These
values are specified in the NER Accuracy Rules, p. 996; S7.2.3 and vary according to the annual generation
volume per connection point.

Figure 1: NER Accuracy Rules, page 996; S7.2.3

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