Imagine receiving a document that clearly states how much carbon your power plant is allowed to emit this year. You also know that an independent party will check whether your plant has stayed within that limit.
For Indonesia’s coal-fired power plants, this is not just a hypothetical scenario. Since February 2023, the rules have been in place: 99 coal-fired power units owned by 42 companies have received their respective emissions limits, along with a market for trading unused allowances.
Emissions limits often attract attention. However, one element that determines whether the entire system can be trusted receives far less discussion: verification. This article follows the process, from the launch event to the auditor’s desk, and concludes with practical steps that power plant owners can take.
The Day Emissions Limits Became Real
On February 22, 2023, according to ANTARA, the Ministry of Energy and Mineral Resources (ESDM) launched carbon trading for the power generation subsector in Jakarta as part of Indonesia’s efforts to achieve its net-zero emissions target.
The figures behind the launch are worth examining:
- Who was covered first: Coal-fired power plants connected to the PLN grid with a capacity of at least 100 MW.
- How many: 99 units across 42 companies, with a total installed capacity of 33,569 MW.
- Expected impact: The government roadmap estimates the potential to reduce emissions by more than 36 million tonnes of CO2e by 2030.
At the event, the Minister of Energy and Mineral Resources handed over emissions limit documents to several power companies, including Cirebon Power, PLN Indonesia Power, and PLN Nusantara Power. Cirebon Power shared an interesting point: the PTBAE-PU allocation it received was classified as a surplus. This meant its emissions were below the government-set limit, and the company intended to maintain that position.
Your Limit, Your Allowance: PTBAE and PTBAE-PU
These two abbreviations are central to the entire mechanism.
PTBAE (Persetujuan Teknis Batas Atas Emisi, or Technical Approval for the Upper Emissions Limit) establishes the maximum permitted emissions level for a power plant during a specific period. It is determined by the Minister of Energy and Mineral Resources and varies according to the type and capacity of the power plant.
PTBAE-PU refers to the emissions allowance allocated to each generating unit owned by a business operator (Pelaku Usaha). The allocation is determined through the Director General of Electricity.
The PTBAE values for the first phase are as follows:
| Power Plant Category | PTBAE (tCO2e/MWh) |
|---|---|
| Mine-mouth or non-mine-mouth coal-fired power plants, 25 MW to less than 100 MW | 1.297 |
| Mine-mouth coal-fired power plants, ≥ 100 MW | 1.089 |
| Non-mine-mouth coal-fired power plants, 100–400 MW | 1.011 |
| Non-mine-mouth coal-fired power plants, above 400 MW | 0.911 |
A simple way to understand the difference is this: PTBAE is the emissions allowance per unit of electricity, while PTBAE-PU is the portion allocated to an individual power generation unit.
Surplus, Deficit, and Offsets: How Does Trading Work?
This is where emissions limits acquire financial value. A generating unit whose emissions exceed its PTBAE-PU allocation is classified as being in deficit. It must purchase allowances from units with lower emissions, which have a surplus, or purchase a Greenhouse Gas Emission Reduction Certificate (SPE-GRK) as an offset.
Surplus allowances do not simply expire. Remaining surplus can be traded in the following year, for up to two years after the trading period ends, provided it does not exceed the relevant carbon trading phase. Trading can take place directly or through a carbon exchange. Both mechanisms are regulated under Presidential Regulation No. 98/2021.
This raises a reasonable question: if surplus allowances can be sold, what prevents companies from simply reporting better emissions figures?
The Key: Every Number Needs Evidence
Verification addresses this concern. Emissions reports from generating units participating in carbon trading must undergo validation and verification by independent validators and verifiers before they are considered valid.
As explained during the 2023 launch, power plant operators follow three key annual deadlines:
- December 31: Submit the annual greenhouse gas (GHG) emissions monitoring plan for each generating unit.
- March 31 of the following year: Complete independent validation and verification of the emissions report submitted through the APPLE-Gatrik application.
- April 20 of the following year: Submit the PTBAE-PU implementation results, evidence of emissions offsets, and the verified emissions report.
Failure to meet these obligations carries consequences. Business operators that do not submit their monitoring plans and GHG emissions reports will receive a written warning from the Minister of Energy and Mineral Resources. In addition, their PTBAE-PU allocation for the next trading period will be reduced to 75 percent.
Who Checks the Verifiers?
According to reporting by Indonesia’s National Standardization Agency (BSN), the National Accreditation Committee (KAN) had accredited seven Validation and Verification Bodies (LVVs). Five were accredited for the carbon economic value (NEK) scope, while four were accredited to verify PTBAE-PU emissions reports.
Taken together, the electricity generation subsector’s process, as described by ESDM, resembles a relay race:
Monitoring Plan → PTBAE-PU Allocation → Emissions Report (APPLE-Gatrik) → Independent Verification → Submission of Results
Are the Emissions Limits Strict Enough?
Not everyone agrees that they are. The Institute for Essential Services Reform (IESR) welcomed carbon trading as an appropriate instrument but considered the current upper emissions limits relatively high. IESR stated that coal-fired power plants in neighbouring countries have emissions intensities 20–40 percent lower than those in Indonesia. This suggests there is still room to tighten the limits in the future.
The implicit message for power plant owners is clear: if the limits become stricter, today’s surplus could become tomorrow’s deficit. Accurate and verified emissions data is no longer just an administrative requirement. It is an asset.
What Power Plant Owners Can Do This Quarter
Based on the requirements described above (an editorial synthesis by CBQA Global, not a direct quotation from the source):
- Map generating units that fall within the scope of PTBAE-PU.
- Strengthen emissions monitoring, starting with fuel data, electricity production figures, and emissions calculations.
- Prepare emissions reports in APPLE-Gatrik before the applicable deadlines.
- Select an independent verifier accredited for the relevant scope.
- Monitor regulatory updates, as emissions limits, deadlines, and trading phases may change.
Conclusion
Emissions limits without verification are merely statements of intent. Verification turns reported figures into information that can be trusted by the market, regulators, and even your own finance director.
Read also: PTBAE-PU: Upper Emissions Limits and Carbon Trading in Indonesia
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