REC, LGC, and PPA
A renewable energy certificate (REC), large-scale generation certificate (LGC), or power purchase agreement (PPA) attributes electricity to renewables. Certificates must be surrendered each year. This page applies only to market-based Scope 2.
Inventory year versus later years
The projection start year (PSY) can include certificates you already hold. That PSY share applies on all pathways in the start year only. It is inventory. It is not an internal action.
Later years on BAU and plus-external-trends have 0% voluntary certificates. Australia still receives mandatory renewable power percentage reductions.
On the plus-internal-actions pathway, the purchase schedule continues. Later-year purchases are an internal action.
MAC places certificates last
Efficiency actions run first. They reduce remaining kWh. Certificate cost then applies to the scheduled percent of remaining kWh, each year after PSY.
REC is always last on the MAC curve. Electricity-efficiency abatement does not fall to zero when REC is 100%.
Example: 30% inventory, then repurchase
PSY inventory is 30% in 2025 on every pathway. Set the later-year repurchase percent and an efficiency action share.