Turkcell runs 50 MW of data-centre IT load and added 225.8 MW of solar in 2025

Turkcell, which estimates that it is Türkiye's largest data-centre operator by IT capacity, had 50 MW of IT load commissioned across its four new-generation data centres at the end of 2025, out of a potential 54 MW, according to its annual report on Form 20-F. In the same year its energy subsidiary installed a 163.5 MW solar plant and commissioned a further 62.3 MW, and the group's energy bill fell 12.6 per cent to TRY 5,105.3 million. The filing sets out, more fully than the company's other public documents reviewed by Corridor Signal, how one corridor operator is trying to control the cost of powering servers before it doubles its capacity.

The plan to double is tied to Google. Turkcell will provide the infrastructure for a Google Cloud region in Türkiye expected to become operational in or around 2028 to 2029 with three or more zones, and it aims to more than double its data-centre capacity by the end of 2032, investing US$1 billion in connection with the partnership, the filing says.

Turkcell's data-centre and power assets

Method: every row comes from Turkcell's Form 20-F for the year to 31 December 2025, filed with the US Securities and Exchange Commission on 17 April 2026, from the sections on data-centre and cloud services, Turkcell Enerji, environmental matters and operating results. Capacities are as stated by the company: IT capacity for data centres, and installed or mechanical capacity for generation.

How the power side is built

Turkcell has two levers on power cost. The first is supply. Its subsidiary Turkcell Enerji holds a 20-year electricity supply licence from the Energy Market Regulatory Authority, issued in May 2017, that allows it to buy and sell electricity in wholesale and retail markets at unregulated prices, the filing says. Revenue in the group's Other segment rose mainly because of Turkcell Enerji's electricity sales to other group companies.

The second is generation. Turkcell Enerji owns the 18 MW Karadağ wind plant near İzmir through Boyut Enerji, which has a state purchase guarantee until the end of 2026, and added the two solar plants in 2025. Together the solar additions come to 225.8 MW of nameplate capacity, a Corridor Signal sum, against 54 MW of potential data-centre IT load. The filing says the aim is to offset a portion of the group's own consumption, not all of it.

Turkcell also says it has met all of its electricity consumption from renewable sources since 2021, verified by renewable energy certificates known as YEK-G. That is a certificate-based claim, separate from the physical output of its own plants.

What drove the cost down

The 12.6 per cent fall in energy cost in 2025 was "primarily driven by the impact of Turkish Lira depreciation and savings from solar energy initiatives, which more than offset the rise in energy prices," according to the filing. In 2024 the cost fell 15.9 per cent from TRY 6,948.7 million, which the company attributed mainly to the inflation effect. Both comparisons are in lira as reported under inflation accounting, so they show direction rather than a clean real-terms saving.

Market prices for large users have since moved in Türkiye's favour. Eurostat's data show the price for Turkish consumers using 70,000 to 149,999 MWh a year fell to €0.0486 per kWh, excluding VAT, in the first half of 2026 from €0.0702 in the second half of 2025, according to its October release. Turkcell's own consumption across 32 data centres and a national mobile network is likely to sit above that band, so the figure is an indication of direction rather than of Turkcell's price.

The risks are in the filing too. Turkcell says the profitability of the data-centre business is subject to rising energy costs and the stability of power supply, and that heat waves could raise energy prices or cause shortages, "in particular due to energy consumption of our network infrastructure or data centers." With 50 MW in use, a hyperscale region due around 2028 and a target to double capacity by 2032, the balance between owned generation, market purchases and certificates is the number to watch in the next annual report.