How many YEK-G certificates do you need? Green electricity certificate calculator

Electricity drawn from the grid is a physical mix whose source plant cannot be identified. A business that wants to claim renewable consumption documents it by redeeming, in its own name, renewable guarantees of origin equal to its consumption. In Türkiye this certificate is YEK-G.

What is a YEK-G certificate

A Renewable Energy Guarantee of Origin (YEK-G) is an electronic certificate showing that one megawatt-hour was generated from a renewable source. EPİAŞ runs the system. On the generator’s application one certificate is issued per MWh; it is transferred to a buyer and, once redeemed against consumption, cannot be used again.

The certificate is separate from the physical sale of power. A business buying electricity from a supplier can obtain the same amount of YEK-G certificates from that supplier or from the market.

How many certificates you need

The calculation is a direct ratio: one certificate per MWh. Renewable energy you generate and consume on site, such as rooftop solar, covers part of the target if its environmental attributes are not sold separately, and reduces the certificates needed.

Figure 1 Certificates needed by target for a site consuming 10,000 MWh a year

25% target

2,500

50% target

5,000

75% target

7,500

100% target

10,000

How to obtain YEK-G certificates

2026 rules and fees

Fees follow the 2026 tariff approved by EPDK and exclude VAT. They apply to direct market participants.

Why it matters: Scope 2 and supply chains

In corporate emissions reporting, indirect emissions from electricity are reported as Scope 2. Under the GHG Protocol market-based method, renewable consumption is shown with guarantees of origin like these. Consumption without certificates is reported at the grid average.

For manufacturers exporting to the European Union, this documentation is becoming a commercial requirement. The EU Carbon Border Adjustment Mechanism and large buyers’ supply chain targets ask suppliers to document their energy sources.

Saying you use green power is not enough; each megawatt-hour has to be shown with a certificate redeemed in your name.

Figure 2 Annual certificates for a 100% target in sample businesses

Hotel

1,800

Cold store

2,400

Textile factory

12,000

An illustrative calculation

Take a factory consuming 12,000 MWh a year, self-consuming 1,500 MWh from rooftop solar and wanting to document all of its consumption as renewable.

Illustrative calculation. Assumes the rooftop solar attributes are not sold separately.

What it means for businesses

The simplest route to YEK-G certificates is a supplier offering certificate-backed supply. Electricity and certificates come under one contract, certificates are redeemed in your name and records are ready for reporting.

You can set the target in stages: document part of consumption now and all of it in later years. Because the number of certificates is proportional to consumption, budgeting is straightforward.

At Frekans we supply your electricity and match and report your consumption with YEK-G certificates. We can work out together how many certificates your target needs and what certificate-backed supply costs.