SPARC: A market mechanism for shifting contracted coal generation to verified renewable delivery, one MWh at a time.
Reserve margins in Thailand and the Philippines exceed 40%. The system already has more contracted generation than it needs. Long-term PPAs guarantee coal plant offtake regardless of cost.
Every new renewable MWh added as a new contract increases consumer obligation and stresses grid systems. It does not replace contracted coal capacity or dispatch directly.
The Energy Transition Mechanism and similar approaches need to purchase the full net present value of remaining PPA cash flows. That logic works for one or two transactions. It cannot decarbonize a fleet.
Requires the NPV of remaining PPA cash flows upfront — typically hundreds of millions per plant before a single MWh shifts.
Three to five year preparation timelines across debt and equity restructuring, involving every creditor and counterparty.
Creates a concentrated loser in the coal operator, who has every incentive to lobby against the mechanism at every stage.
Buying out the PPA surrenders a granted production right at full price. The entire cost passes to carbon buyers, pricing them out.
SPARC doesn’t buy out a coal plant or terminate an existing PPA. Behind the scenes it disaggregates the contract into defined delivery bands. A renewable generator acquires a band, delivers the MWh, and the coal plant produces less. The contract remains intact. Production shifts one MWh at a time.
A SPARC stream is a registered delivery band inside an existing coal PPA. It carries the right to supply power, the right to receive payment, and the embedded right to emit carbon, along with the corresponding delivery and availability obligations. These rights were previously inseparable from the PPA. SPARC makes them transferable.
When one eligible MWh is delivered under a registered SPARC stream and confirmed through metering, one SPARC is created. It records the delivery, the right to get paid and carries the embedded emission right associated with the originating coal PPA. The SPARC registry reflects what actually happened.
The SPARC record proves the MWh fulfilled a coal-backed delivery band. If this MWh was produced with renewables, a REC or equivalent certificate proves the energy attribute. In this case, an ARC proves the emission right attached to that band was not used.
An ARC is issued only after lower-emission electricity has fulfilled a registered stream. It records the emission right attached to that band but not exercised. The reference point is not a modeled counterfactual; it is the coal-backed production and emission right already recorded in the stream.
That matters because a verified claim on lower-emission delivery inside Southeast Asia’s coal fleet requires strong evidence.
Existing long-term PPA
Tranches of the PPA registered
as SPARC streams
Fulfill SPARC streams;
deliver energy
Coal obligation delivered
from a different source
REC or equivalent certificate
evidences renewable generation
Evidence that a granted
emission right was not used