Generation or consumption facilities connected to the transmission system must not exceed the contracted capacity written in their system-use agreement with TEİAŞ. Taking electricity from, or injecting electricity into, the connection point above that capacity is a contracted-capacity excess breach. TEİAŞ invoices the contractual penalty without prior notice. This article summarises the legal basis, 2026 unit prices, the 15 tariff regions and how the monthly charge is calculated. Demand excess on the distribution side is a separate item; we cover it in our Contract Power and Peak Load guide.
EMRA 14204
Decision
Effective 01.01.2026
excess × monthly fixed × 2
Formula
Agreement art. 9/B
annual × days / 365
Monthly fixed
Method 4.9
588,118 TL
Example (Region 10)
14.064 MW / July
What is contracted capacity?
Contracted capacity is the capacity allocated to the user in the connection and system-use agreements. The maximum electricity taken from or given to the transmission connection point must not exceed this value. It is not the same as distribution contract power; our contract-power glossary entry defines the distribution maximum withdrawal limit.
- Generators (injection): Power injected into the system must not exceed the injection capacity in the agreement. The first contracted capacity is as a rule equal to the licensed installed capacity.
- Consumers (withdrawal): Power withdrawn from the system must not exceed the withdrawal capacity in the agreement.
- The excess is not a “you sold / bought extra energy” invoice. It is a system-use penalty for a capacity breach.
Legal basis
| Instrument | What it does |
|---|---|
| Electricity Market Law 6446 arts. 8/2-d, 17, Additional art. 3 | TEİAŞ monitors the breach and applies the contractual penalty. EMRA approves the transmission tariff. |
| Connection and System Use Regulation arts. 5 and 7 | Defines contracted capacity. Prohibits excess. Provides for sanction without notice (art. 7: OG 09.11.2023/32364). |
| Tariffs Regulation art. 7 | Transmission tariff = system use + system operation. |
| System Use Agreement arts. 2 and 9/B | Writes the penalty formula (excess × monthly fixed × 2). |
| EMRA 30.12.2025 / 14204 | 2026 transmission tariffs, province-based regions and the Method Notice. |
The core of Regulation art. 7: the capacity allocated in the agreements is contracted capacity. If the user breaches it, no extra notice is required; the sanction in the system-use agreement applies.
2026 Method Notice: 4.9, 4.14 and 4.15
4.9 — Monthly fixed charge
Users pay monthly according to the annual consumption and/or generation fixed system-use tariffs approved for that pricing year. Monthly fixed = annual fixed tariff / number of days in the year × relevant period (days) × capacity (MW). 2026 is not a leap year (365 days). July has 31 days. The TL/MW-year figure in the table is not the invoice unit price; it is first converted to a daily, then a monthly, rate.
4.14 — Contractual penalty on excess
The fixed system-use charge is calculated on the withdrawal and/or injection capacities in the system-use agreement signed with TEİAŞ. If, in a metering period, power taken from or given to the system exceeds the agreed capacity, the contractual penalty applies to the excess part. “Excess MW” cannot be verified without knowing contracted capacity.
4.15 — If an increase request is refused
If the user requests an agreement revision to increase capacity, the request is refused because of a system constraint or extra network investment, and the excess continues, the contractual penalty is applied on the highest excess value.
Penalty formula
System Use Agreement art. 9/B: Penalty = excess (MW) × monthly fixed system-use tariff (TL/MW) × 2. Excess = measured maximum power − contracted capacity (withdrawal or injection). The 2× multiplier is not written in the 14204 tariff table; it is in the standard agreement.
- The monthly fixed rate is derived from the annual tariff under 4.9.
- TL/MWh columns (energy and system operation) are not used in the penalty.
- TEİAŞ instructions, TEİAŞ-sourced effects and defined load transfers do not count as power excess.
- The 2026 winter permission (13922) covers 01.12.2025–28.02.2026; it does not cover July.
2026 generation fixed system-use tariffs
Source: EMRA 14204, 01.01.2026 — TEİAŞ notice on 2026 system-use and system-operation tariffs. Unit: TL/MW-year. In all regions the generation energy charge is 109.68 TL/MWh and system operation is 60.71 TL/MWh (they do not enter the penalty). Consumption fixed tariffs are a separate column. The facility region is read from Decision Annex-2 province-based tariff regions and the TEİAŞ contents schedule.
| Region | Generation SUT (TL/MW-year) | July 2026 monthly fixed (× 31 / 365) | Penalty unit price (× 2) |
|---|---|---|---|
| 1 | 123.429,69 | 10.483,34 | 20.966,68 |
| 2 | 156.234,30 | 13.269,20 | 26.538,40 |
| 3 | 145.494,07 | 12.357,17 | 24.714,34 |
| 4 | 151.658,69 | 12.880,70 | 25.761,40 |
| 5 | 161.960,64 | 13.755,47 | 27.510,94 |
| 6 | 160.972,61 | 13.671,56 | 27.343,12 |
| 7 | 184.979,16 | 15.710,41 | 31.420,82 |
| 8 | 183.166,40 | 15.556,46 | 31.112,92 |
| 9 | 189.835,83 | 16.122,91 | 32.245,82 |
| 10 | 246.182,29 | 20.908,63 | 41.817,26 |
| 11 | 252.828,95 | 21.473,14 | 42.946,29 |
| 12 | 244.772,27 | 20.788,88 | 41.577,76 |
| 13 | 235.605,83 | 20.010,36 | 40.020,72 |
| 14 | 260.949,94 | 22.162,87 | 44.325,74 |
| 15 | 273.224,42 | 23.205,50 | 46.411,00 |
Worked example (Region 10, July 2026, generation/injection)
Assumption: measured injection 14.064 MW, contracted capacity 0 MW. Annual tariff (region 10) 246,182.29 TL/MW-year. Monthly fixed: 246,182.29 × 31 / 365 = 20,908.63 TL/MW. Excess: 14.064 − 0 = 14.064 MW. Penalty: 14.064 × 20,908.63 × 2 = 588,117.94 TL. The unit price on the invoice often already embeds the 2×: 41,817.26 TL. Dividing the annual figure by 12 is wrong; 20,908.63 × 12 = 250,903.56 is not in the table.
Invoice and contents schedule
TEİAŞ usually sends two documents. The contents schedule is an information document: it shows region, measured power, contract power, monthly tariff, penalty rate and amount. The e-invoice is the official assessment; the line name is typically “System Use Penalty Charge (Contracted Capacity Excess GENERATION/CONSUMPTION)”. Payment is requested within 15 days of notification. Late payment attracts default interest under Law 6183 art. 51. An objection other than a clerical error does not stay payment.
Review checklist
- Connection agreement and system-use agreement (Annex-1, withdrawal/injection capacity).
- Generation-subscriber OSOS records (metering point, meter, period injection/withdrawal power).
- OSOS records of the netted / paired subscriber.
- Related consumption and generation invoices and revenue extracts.
- Any TEİAŞ instruction, load-transfer minute or periodic Board permission.
Excess is confirmed not only from the invoice line but from the difference between agreed capacity and maximum power in OSOS. Our OSOS glossary entry summarises the metering stack.
Stop the penalty with the ENOPTIMAL control system
TEİAŞ invoices the excess without prior notice; an objection (other than a clerical error) does not stay payment. Preventing the penalty means watching contracted capacity at the moment of measurement, not at month-end. The ENOPTIMAL control system continuously compares OSOS maximum withdrawal and injection power with agreed capacity and raises an alert as the limit is approached. Operations can decide on generation curtailment, load shifting or an agreement revision before the invoice — intervention happens before a penalty line is created.
- Contracted capacity (withdrawal/injection) and OSOS peak MW on one panel; the gap is live.
- Threshold alert (e.g. 90% of capacity) — act before the no-notice TEİAŞ invoice.
- Estimated penalty in TL from the regional tariff and the 2× formula; the peak hour is visible.
- Reconciliation of the contents schedule / e-invoice line with OSOS — a false 0 MW contracted capacity is caught.
The ENOPTIMAL consumption-management module tracks hourly consumption and injection/withdrawal power via OSOS. On our OSOS consumption monitoring page, period peak MW, contracted capacity and the regional tariff come together; in our electricity invoice tracking module the TEİAŞ penalty line is bound to the same data set. The control system both prevents the penalty and verifies the invoice that does arrive.
Conclusion
Contracted-capacity excess is a capacity breach, not an energy-sales invoice. 2026 unit prices are set by EMRA 14204; the 2× sits in the agreement. Monthly fixed = annual TL/MW-year × days in the month / 365 (Method 4.9). Excess is the measured power above the agreed withdrawal/injection capacity (4.14). Because TEİAŞ invoices without notice, OSOS-based monitoring with the ENOPTIMAL control system is the practical way to prevent this penalty.