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What is an STC, an LGC, and a REC?

Renewable Energy Certificates (RECs) were the primary commodity in the RET (the scheme replaced on 1 January 2011), and is still an umbrella term covering both Small-scale and Large-scale certificates.

The small-scale technology certificate (STC)

Small-scale technology certificates (STCs) are created by eligible installations of solar water heaters, air source heat pump water heaters and small generation units (small-scale solar photovoltaic panels, wind and hydro electricity systems). A STC is generally equivalent to:

• 1 MWh of renewable electricity deemed to be generated by small generation units unless the Solar Credits REC multiplier applies; or
• 1 MWh of electricity deemed to be displaced by the installation of solar water heaters.

The large-scale generation certificate (LGC)

Large-scale renewable energy projects such as wind and solar farms, and hydro-electric schemes, are entitled to create LGCs.

An LGC is equivalent to:

• 1 MWh of renewable electricity generated above the power station baseline.

For more information see:

• About the Schemes
• About the Certificates