Solar power is paying 20% of total FCAS regulation costs: Latest research from Cornwall Insight Australia shows that solar farms are responsible for paying somewhere between 10%-20% of total regulation FCAS costs in any given month (see Figure 1).


This is disproportionate to solar energy generation in the NEM, which in FY20, was only ~3%. In contrast, wind is far more proportionate with cumulative FCAS causer pays* factors accounting for ~10% of FCAS regulation costs. Wind provided ~9% of total generation for the NEM in FY20.

Solar power is paying 20% of total FCAS regulation costs

In fact, calculations by Cornwall Insight Australia highlights that FCAS causer pays costs solar farm owners, conservatively, around $2,368/MW/yr.**, which is ~$1.55/MWh. In 2019 this was closer to $5.5/MWh. It should be noted that not all regions are created equal, with solar farms in Queensland in FY20 on average having higher causer pays factors than other states.


Ben Cerini, Principal Consultant at Cornwall Insight Australia, said:


“Since 2018, regulation FCAS costs have fluctuated between $10-$40mn a quarter. Q220 was a relatively small quarter by recent comparisons at $15mn with the last three quarters before that more than $35mn a quarter.


“Renewable energy generators have historically turned off to avoid negative pricing. However, a new operational consideration for renewables is the liability that high regulation FCAS prices pose to the profitability of current and future renewable energy projects.


“As wholesale prices have fallen, potential power purchase tenures have shortened, and loss factors have fluctuated. Developers and investors are aware of any increased risk to project costs. FCAS liabilities are now firmly on the due diligence agenda as new projects look to forecast the future cost of regulation causer pays.”

* A causer pays factor is based on how much a generator deviates from their linear ramp rate to meet their next energy dispatch target for each dispatch period.

** Assumptions: $15mn a quarter for regulation FCAS costs, for which solar was responsible for 15% of these and current solar installed capacity is ~3.8GW.

Solar power is paying 20% of total FCAS regulation costs – Post kindly contributed by Cornwall insight Australia

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