Battery Energy Storage Investment in Turkey: 2026 Licensing and Regulatory Guide

Invest in battery energy storage in Turkey with confidence. This 2026 guide explains EMRA licensing, standalone and integrated BESS projects, TEİAŞ grid connection, ancillary services, renewable energy storage, foreign investment, project finance, and regulatory risks.

Battery energy storage systems are becoming an increasingly important component of Turkey’s electricity market. For foreign energy companies, infrastructure funds, renewable-energy developers, technology providers, and institutional investors, battery energy storage can offer opportunities ranging from renewable-energy integration to grid services and electricity-market participation.

However, a Battery Energy Storage System (BESS) investment in Turkey should not be approached as an ordinary equipment or infrastructure investment.

Electricity storage operates within Turkey’s regulated electricity market. The legal structure of the project can affect licensing, grid connection, market participation, land rights, technical compliance, financing, construction, and future revenues.

The regulatory framework is also evolving. Most importantly for investors conducting transactions in 2026, TEİAŞ published revised final Grid Connection and Compliance Criteria for Electricity Storage Facilities on February 27, 2026, withdrawing the previous criteria issued on December 30, 2024.

TEİAŞ then introduced another important update on July 3, 2026, replacing the earlier technical criteria and testing procedures governing the use of electricity storage units and facilities in ancillary services.

These developments make 2026 regulatory due diligence particularly important.

How Is Electricity Storage Regulated in Turkey?

The legal foundation for electricity storage has developed through Electricity Market Law No. 6446 and secondary legislation administered by the Energy Market Regulatory Authority (EMRA).

EMRA currently lists the Regulation on Electricity Storage Activities in the Electricity Market among the regulations governing the electricity market.

The regulatory architecture also interacts with the Electricity Market Licensing Regulation, Electricity Grid Regulation, connection and system-use rules, market rules, and TEİAŞ technical requirements.

As a result, investors should not ask merely:

“Do battery storage facilities require a license?”

The more useful question is:

“What type of storage project are we developing, and which regulatory structure applies to it?”

That distinction is fundamental.

Main Types of Battery Storage Projects in Turkey

The regulatory position differs depending on the project’s structure.

Investors may encounter:

• storage integrated with an electricity generation facility;
• standalone electricity storage facilities;
• storage-integrated renewable generation projects;
• storage associated with consumption facilities;
• storage used in connection with market or ancillary-service activities.

EMRA’s storage framework has expressly contemplated both electricity storage units integrated into generation facilities and standalone electricity storage facilities.

Foreign investors should classify the project correctly before determining its licensing path.

Storage-Integrated Renewable Energy Projects

One of the most commercially important investment models involves electricity storage combined with renewable generation.

Solar-plus-storage and wind-plus-storage projects can provide strategic advantages by combining renewable generation with storage capability.

However, investors must distinguish the legal rights associated with the generation facility from the rights and technical obligations associated with the storage component.

A project described in an investment memorandum as a “100 MW solar-plus-storage project” should therefore be tested against its actual EMRA and TEİAŞ documentation.

The buyer should verify:

• preliminary-license status;
• generation source;
• installed generation capacity;
• storage capacity;
• storage power;
• connection point;
• grid allocation;
• regulatory amendments;
• technical compliance.

The commercial description of the project should match its regulatory reality.

Preliminary License and Generation License

For electricity generation projects subject to licensing, Turkey continues to operate a preliminary-license and generation-license structure.

EMRA confirms that a legal entity seeking to generate electricity must generally obtain a preliminary license first and then, after completing the applicable obligations during that period, obtain a generation license.

This distinction is particularly important for investors purchasing development-stage storage-integrated renewable projects.

A preliminary license is not equivalent to an operational generation license.

The buyer must determine which development obligations remain outstanding and whether the project can realistically progress to construction and generation.

Standalone Electricity Storage

Standalone storage requires a different analysis from storage integrated into a generation facility.

EMRA’s regulatory materials have expressly addressed standalone electricity storage within the licensing structure, including its relationship with supply licensing.

Therefore, a foreign investor should not assume that a standalone battery project can simply charge from the grid and sell electricity without an appropriate electricity-market regulatory structure.

The proposed business model should be mapped against the current EMRA framework before capital expenditure is committed.

Is There a Separate “Battery License”?

Investors should be cautious with terminology.

Turkey’s regulatory system does not mean that every battery installation simply obtains a universally applicable document called a “battery license.”

The regulatory treatment depends on how the storage facility participates in the electricity market and whether it is standalone, integrated with generation, associated with another licensed activity, or used under another permitted structure.

This distinction should be reflected in project documentation, financing agreements, acquisition contracts, and legal opinions.

Grid Connection Is One of the Biggest Investment Risks

A battery project may have excellent technology and financing but still fail commercially if it cannot obtain or maintain suitable grid access.

Grid due diligence should examine:

• connection point;
• connection capacity;
• charging capacity;
• discharge capacity;
• voltage level;
• connection agreement;
• system-use arrangements;
• transmission or distribution connection;
• reinforcement requirements;
• technical compliance.

The investor should not assume that a generation project’s existing connection automatically permits every proposed battery configuration.

The storage component must be reviewed independently against current technical requirements.

Major 2026 Development: Revised TEİAŞ Connection Criteria

This is one of the most important regulatory developments for battery investors in Turkey in 2026.

On February 27, 2026, TEİAŞ published the final revised version of the Grid Connection and Compliance Criteria for Electricity Storage Facilities.

TEİAŞ expressly stated that the previous criteria published on December 30, 2024 were repealed and replaced by the revised framework.

This is particularly important for projects whose technical studies, EPC designs, investment committee approvals, or financing assumptions were prepared under the previous criteria.

Foreign investors acquiring a storage project in 2026 should therefore ask:

Was the project’s grid design tested against the February 27, 2026 criteria?

If not, the technical and regulatory due diligence should be refreshed.

Monitoring and Control Requirements

Battery storage is not merely a passive grid asset.

Storage facilities can rapidly charge and discharge substantial quantities of electricity, making monitoring, communication, control, and system coordination important for network security.

The Electricity Grid Regulation required TEİAŞ to develop technical criteria concerning the monitoring and control of storage units and facilities, their use in ancillary services, and their grid connection. TEİAŞ’s subsequent technical publications implement this framework.

Investors should therefore ensure that SCADA, communication, monitoring, control, and data infrastructure are included within both technical and legal due diligence.

Major July 2026 Development: Ancillary Services

Battery storage can potentially create value beyond simple energy arbitrage.

Its rapid response capability makes storage relevant to ancillary services, subject to the applicable market and technical requirements.

On July 3, 2026, TEİAŞ published an updated version of the Technical Criteria and Testing Procedures for the Use of Electricity Storage Units or Facilities in Ancillary Services.

The earlier version dated December 30, 2024 was withdrawn.

This means investors preparing ancillary-service revenue models in 2026 should verify that their technology and testing assumptions comply with the July 2026 criteria.

Historic technical reports may no longer be sufficient.

Do Not Base Valuation on Unverified Ancillary-Service Revenue

This is a particularly important acquisition risk.

A seller may present an attractive financial model containing revenue from:

• electricity-market arbitrage;
• balancing opportunities;
• ancillary services;
• renewable-energy optimization;
• other grid services.

Legal and technical advisers should independently verify whether the project is actually eligible to provide each assumed service.

A projected revenue stream is not a regulatory right.

The SPA should avoid treating speculative future market revenues as guaranteed project income.

Land Rights for Battery Storage Facilities

Battery storage can require significant physical infrastructure, including battery containers, transformers, inverters, control systems, fire-protection installations, substations, access roads, and connection infrastructure.

Investors should verify whether the project company owns or leases sufficient land.

Due diligence should examine:

• title deeds;
• lease agreements;
• easements;
• mortgages;
• attachments;
• zoning;
• construction rights;
• access rights;
• connection infrastructure.

For leased sites, the lease term should be compared with the project’s expected economic life and financing maturity.

Construction and Zoning Compliance

Battery installations may require construction, zoning, municipal, fire-safety, and other project-specific approvals depending on their configuration and location.

The investor should identify every approval required before construction and operation.

For an acquisition of a partially constructed project, counsel should verify that the physical installation corresponds to the approved project.

An unauthorized modification can create both regulatory and insurance problems.

Fire and Safety Risk

Battery storage presents safety issues different from conventional solar and wind facilities.

Depending on battery chemistry and facility design, risks can include thermal runaway, fire, explosion, toxic emissions, and damage to neighboring infrastructure.

Foreign investors should therefore coordinate legal due diligence with specialized technical and fire-safety reviews.

The EPC contract should clearly allocate responsibility for:

• battery safety;
• fire suppression;
• testing;
• emergency systems;
• defects;
• manufacturer warranties;
• performance guarantees.

Environmental Compliance

Battery projects can also create environmental obligations.

These may relate to construction impacts, hazardous materials, waste, damaged batteries, end-of-life management, soil contamination, fire events, and disposal.

The investor should identify who bears responsibility for battery replacement and eventual decommissioning.

A low initial purchase price can conceal substantial end-of-life liabilities.

Battery Supply Agreements

Battery procurement contracts require particularly careful review.

The legal team should examine:

• battery chemistry;
• usable capacity;
• degradation guarantees;
• cycle guarantees;
• availability;
• efficiency;
• warranty duration;
• replacement obligations;
• safety specifications;
• software;
• spare parts;
• manufacturer liability.

For long-term projects, the financial value of the manufacturer’s degradation warranty can be substantial.

Performance Guarantees

A storage facility’s commercial value depends heavily on performance over time.

The EPC or battery supply contract should clearly define how performance is measured.

Relevant concepts may include:

• usable energy capacity;
• power capacity;
• round-trip efficiency;
• availability;
• degradation;
• cycle life.

The buyer should ensure that contractual performance tests correspond to the financial model.

A technically operational battery may still materially underperform commercially.

Software and Cybersecurity

Modern BESS projects rely extensively on digital systems.

Energy management systems, battery management systems, remote-control infrastructure, monitoring platforms, and software licenses can be critical to operation.

Legal due diligence should establish:

• ownership of software;
• licensing terms;
• remote-access rights;
• cybersecurity obligations;
• data ownership;
• maintenance rights;
• source-code arrangements where relevant.

A foreign investor should avoid acquiring hardware while discovering after closing that critical operating software cannot legally be transferred.

Project Finance

Battery storage projects can require substantial capital expenditure.

Lenders will typically focus heavily on regulatory certainty, grid rights, technology risk, manufacturer warranties, revenue assumptions, and construction risk.

Financing documents may require:

• share pledges;
• account pledges;
• equipment security;
• assignment of receivables;
• insurance assignments;
• lender consent for ownership changes.

Foreign buyers acquiring an existing project should identify the entire security package before closing.

Acquiring an Existing Storage Project

Storage project acquisitions require specialized due diligence.

The buyer should verify the target company’s regulatory status directly through current EMRA records. EMRA maintains current lists of electricity preliminary-license, generation-license, supply-license, aggregation-license, and other electricity-market authorizations, including 2026 licensing publications.

The review should also cover all applications, amendments, grid correspondence, TEİAŞ technical assessments, permits, land rights, EPC documentation, battery warranties, financing, and regulatory investigations.

A project should not be valued solely on the basis of a seller’s presentation.

Change of Control and M&A Risk

Foreign investors acquiring a project company should also analyze whether the transaction triggers EMRA procedures.

EMRA maintains dedicated documentation requirements for preliminary-license and license amendments, mergers, demergers, facility and project transfers, approvals, and notifications.

The SPA should therefore identify any required regulatory action as a condition precedent where appropriate.

Closing first and resolving regulatory issues later can create unnecessary risk.

Foreign Investor Documentation

International investors should also anticipate additional documentary requirements where foreign shareholders or foreign entities participate in licensing procedures.

EMRA’s licensing materials in regulated energy markets demonstrate the importance of appropriately authenticated foreign corporate documentation and notarized translations where required.

The precise documentation should be checked for the relevant electricity-market application rather than assumed from another energy sector.

Foreign corporate documents should be prepared early because legalization, apostille, translation, and notarization can affect transaction timetables.

Regulatory Due Diligence Checklist

Before investing in a Turkish BESS project, a foreign investor should confirm the project’s storage structure, applicable EMRA authorization, preliminary-license or generation-license status where relevant, grid connection rights, current TEİAŞ technical compliance, ancillary-service eligibility, land rights, construction permits, battery warranties, degradation guarantees, software rights, environmental obligations, insurance, financing, security, and change-of-control requirements.

The project should also be tested against the February 27, 2026 TEİAŞ grid connection criteria and July 3, 2026 ancillary-service technical criteria where applicable.

Frequently Asked Questions

1. Can foreign investors develop battery storage projects in Turkey?

Yes, subject to the applicable Turkish investment, corporate, electricity-market, licensing, grid, land, technical, and other regulatory requirements. The appropriate structure depends on the type of storage project.

2. Does every battery storage facility need its own EMRA license?

Not necessarily in the simplistic sense of a separate universal “battery license.” The regulatory treatment depends on whether the facility is standalone, integrated with generation, or operated within another permitted electricity-market structure.

3. Can battery storage be combined with a solar or wind power plant?

Yes. Turkey’s regulatory framework recognizes storage integrated with generation facilities. The project’s generation authorization, storage configuration, capacity, and grid rights must be reviewed together.

4. What changed for battery storage projects in 2026?

A major development occurred on February 27, 2026, when TEİAŞ issued revised final grid connection and compliance criteria for electricity storage facilities and repealed the previous December 2024 version. TEİAŞ also updated ancillary-service technical criteria and testing procedures on July 3, 2026.

5. Can battery storage facilities participate in ancillary services?

Potentially, subject to applicable market rules and technical requirements. TEİAŞ maintains specific technical criteria and testing procedures for electricity storage units and facilities used in ancillary services.

6. Is TEİAŞ approval important for a BESS investment?

Grid-related TEİAŞ requirements can be fundamental, particularly for transmission-connected projects. Connection capacity, technical compliance, monitoring, control, and system requirements should be investigated before construction or acquisition.

7. What are the biggest legal risks in buying a Turkish battery storage project?

Major risks include defective grid rights, incorrect licensing assumptions, outdated technical studies, unsupported ancillary-service revenues, insufficient land rights, battery warranty limitations, degradation risk, software restrictions, safety liabilities, lender security, and undisclosed regulatory problems.

8. Should a foreign investor conduct due diligence before buying a storage-integrated renewable project?

Yes. Legal, regulatory, technical, financial, tax, environmental, and insurance due diligence should ideally be completed before the investor becomes unconditionally committed to the acquisition.

9. Can a battery project’s technical rules change after development begins?

Regulatory and technical requirements can evolve. The 2026 replacement of earlier TEİAŞ storage criteria demonstrates why technical compliance should be refreshed before financing, construction, acquisition, and commissioning.

10. What should be checked before signing a BESS investment agreement?

Investors should verify the regulatory structure, grid connection, storage capacity and power, land, permits, EPC and battery contracts, performance guarantees, degradation assumptions, software, safety systems, insurance, financing, revenue model, and all required EMRA or TEİAŞ procedures.

Legal Support for Battery Energy Storage Investments in Turkey

Battery storage investments in Turkey combine energy regulation, grid connection, technology, construction, project finance, land rights, market participation, and M&A risk. In 2026, the revised TEİAŞ technical framework makes current regulatory and technical due diligence especially important for international investors.

Fırat Fesih Kaya provides legal assistance to foreign energy companies, renewable-energy developers, infrastructure funds, battery manufacturers, institutional investors, project sponsors, lenders, and strategic buyers concerning battery energy storage investments, EMRA licensing, storage-integrated solar and wind projects, TEİAŞ grid connection, energy M&A, project acquisitions, regulatory due diligence, and project finance in Turkey.

A carefully structured legal review can identify whether the proposed BESS business model is legally viable before significant capital is committed and can protect investors through appropriate conditions precedent, regulatory approvals, warranties, indemnities, security arrangements, and post-closing compliance measures.

For a case-specific legal assessment concerning a battery energy storage project or renewable-energy investment in Turkey, you may contact our office.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yıldırım Tower No: 148, 06520 Balgat, Çankaya, Ankara, Turkey