Can battery storage be added to an existing power plant in Turkey? A 2026 guide for foreign investors covering EMRA license amendments, integrated storage, grid requirements, capacity increases, permits, YEKDEM and acquisition risks.

Battery energy storage is becoming one of the most important components of renewable energy investment in Turkey. Owners of existing solar, wind and other generation facilities increasingly consider adding battery energy storage systems (BESS) to improve flexibility, manage generation profiles and increase the commercial value of existing grid connections.

However, adding a battery to an operating Turkish power plant is not simply an equipment purchase.

The project may require an EMRA license amendment, technical approval from the relevant network operator, changes to the project’s electrical design and additional zoning, construction, environmental, fire-safety and land analysis.

Turkey’s electricity-storage framework expressly recognizes electricity storage units integrated into generation facilities. A generation-license holder can establish an integrated electricity storage unit at its licensed generation facility, subject to the applicable regulatory requirements. (LEXPERA)

For foreign investors acquiring an existing power plant, the essential question is therefore:

Can battery storage be legally added to this specific plant, at the proposed MW/MWh capacity, without adversely affecting the generation license, grid rights or existing project economics?

What Is an Integrated Battery Storage Unit?

Turkish electricity-market regulation distinguishes between several storage structures.

One important category for existing power plants is the electricity storage unit integrated into a generation facility.

This is different from a standalone storage facility developed independently from a generation plant.

Under the Electricity Market Storage Activities Regulation, generation-license holders may establish an integrated electricity storage unit at their licensed generation facilities. (LEXPERA)

Accordingly, an operating wind or solar project does not necessarily need to create a completely independent electricity business simply because it wants to install a battery.

The correct regulatory structure depends on how the storage system will interact with the existing generation facility and grid.

Does Adding Battery Storage Require an EMRA License Amendment?

Potentially yes.

Turkey’s licensing framework specifically provides procedures for amendments relating to electricity storage units integrated into generation facilities. EMRA began accepting preliminary-license and license amendment applications for adding integrated storage units under the storage regulatory framework. (EPDK)

The investor should therefore establish the amendment requirements before construction.

A foreign investor should not rely on the assumption that:

Existing Generation License + Battery Installed Inside Existing Site = No Additional Regulatory Approval.

The storage unit changes the technical and regulatory configuration of the generation facility and must be analyzed accordingly.

Why the Existing Generation License Must Be Reviewed

Before designing the battery project, the investor should examine the existing generation license.

The analysis should establish:

Generation Source → Licensed Capacity → Electrical Capacity → Installed Capacity → Connection Point → Project Coordinates → Completion Status → Previous Amendments → Existing Storage Rights.

The proposed BESS should then be compared against this regulatory configuration.

This is particularly important when buying an existing plant whose seller claims that it is already “battery ready.”

That expression has no substitute for actual regulatory approval.

Solar Power Plant Plus Battery Storage

Solar generation is particularly suitable for storage because generation is concentrated during daylight hours.

A battery can potentially charge when solar production is available and discharge electricity according to the project’s permitted operational and market structure.

However, the investor must determine whether the battery:

is integrated into the licensed generation facility,

can charge from the grid,

can discharge to the grid,

affects the connection capacity,

and requires changes to existing metering and protection systems.

These questions should be resolved before determining the project’s expected battery revenue.

Wind Farm Plus Battery Storage

Wind projects can also benefit substantially from battery storage.

Wind production can fluctuate rapidly, and storage can potentially provide greater operational flexibility.

For an existing wind project, due diligence should examine:

Wind License → BESS Capacity → Connection Capacity → Substation → Transformer → Metering → Protection → Land → Construction → Fire Safety.

The investor should also determine whether existing substation infrastructure can technically accommodate the proposed storage installation.

A legally permissible battery project can still be commercially unattractive if major grid-infrastructure upgrades are required.

Can an Existing Wind or Solar Plant Increase Capacity by Adding Storage?

This is one of the most commercially important issues.

The Electricity Market Licensing Regulation contains a specific mechanism concerning existing wind and solar generation facilities that commit to installing electricity storage.

For partially or fully operational wind or solar generation facilities, license holders committing to install an electricity storage unit may, subject to the regulatory conditions, be permitted a capacity increase up to the installed capacity of the committed storage unit. The added renewable generation units and storage unit are then treated within the storage-integrated generation framework. (LEXPERA)

This creates a potentially important investment opportunity.

For example, an operating wind project may investigate whether adding BESS can support a corresponding regulatory capacity-increase strategy.

However, foreign investors should not treat this as an automatic entitlement.

The specific conditions, connection opinion and license-amendment requirements must be satisfied.

Battery MW and MWh Are Different

Foreign investors should understand two fundamental battery measurements.

MW represents the battery’s power capacity.

MWh represents the amount of energy it can store.

For example, a:

50 MW / 100 MWh BESS

can theoretically discharge at 50 MW for approximately two hours, subject to technical characteristics and losses.

This distinction is critical when evaluating investment cost and revenue potential.

A seller describing a project simply as a “100 MW battery project” may therefore be providing insufficient information.

The investor needs to understand both power and energy capacity.

Grid Connection Is Critical

Battery economics depend heavily on the project’s grid position.

The relevant network operator may need to assess the technical compatibility of the proposed storage system.

Turkey’s storage regulatory infrastructure includes specific technical criteria developed for connection of electricity storage facilities to the grid and their use in ancillary services. (EPDK)

Accordingly, the investor should determine:

Existing Connection Capacity → BESS Capacity → Charging Configuration → Discharging Configuration → Transformer Capacity → Substation Capacity → Protection Systems → Metering Requirements.

The existing grid connection should never be assumed to accommodate the proposed battery automatically.

Can the Battery Charge From the Grid?

This question has important economic consequences.

The regulatory framework recognizes circumstances in which storage associated with generation can draw electricity from the grid and subsequently return electricity to the grid.

However, the regulatory treatment of this energy is important.

For integrated storage associated with generation facilities benefiting from YEKDEM or another guaranteed support mechanism, electricity drawn from the grid and later returned does not automatically become eligible for the support applicable to electricity generated by the renewable plant. (LEXPERA)

This prevents a battery from simply purchasing grid electricity and later presenting that electricity as subsidized renewable generation.

Battery Storage and YEKDEM

This distinction deserves particular attention in financial modelling.

Suppose a solar project participates in a renewable support mechanism.

The investor installs a battery and charges it partly from the grid.

Electricity later discharged from the battery should not automatically be assumed to receive the same support applicable to electricity genuinely produced by the renewable generation facility.

The current storage regulation expressly addresses this distinction. (LEXPERA)

Accordingly:

Renewable Generation Revenue ≠ Automatically Battery Discharge Revenue.

The investor’s financial model should separately analyze the treatment of stored electricity.

Battery Storage and Existing Connection Capacity

Another common misconception is that installing a battery automatically creates additional export capacity.

It does not.

The project’s permitted electrical and grid configuration remains critical.

The investor should distinguish:

Generation Installed Capacity

Battery Power Capacity

Battery Energy Capacity

Electrical Capacity

Grid Connection Capacity

These figures should be separately verified.

Battery Storage and Capacity Increase

Where storage is being installed together with a proposed increase in wind or solar capacity, the transaction becomes more complex.

The project may require coordinated analysis of:

Storage Commitment → Generation Capacity Increase → License Amendment → Connection Opinion → Additional Generation Units → Construction → Acceptance.

The licensing framework expressly connects certain storage commitments with capacity-increase applications for existing wind and solar projects. (LEXPERA)

Foreign investors should therefore evaluate the battery and generation expansion as a single regulatory strategy rather than two unrelated investments.

Battery Storage and Land Requirements

Utility-scale battery installations require physical space.

A BESS project may require:

battery containers,

power conversion systems,

transformers,

switchgear,

control systems,

internal roads,

security infrastructure,

and fire-safety separation areas.

The project company must therefore have legally sufficient rights over the relevant land.

The investor should determine whether the existing generation site includes adequate space or whether additional land is necessary.

Existing Land Leases

Where the power plant operates on leased land, the lease should be reviewed carefully.

A lease drafted years before battery storage became commercially common may permit only electricity generation from a specific renewable source.

Installing a substantial BESS facility may require landlord consent depending on the contractual wording.

The buyer should therefore review:

Permitted Use → Construction Rights → Additional Equipment → Landlord Consent → Rent Adjustment → Lease Duration.

A regulatory approval does not override contractual limitations in the project’s land arrangements.

Project Coordinates

If the battery is installed outside the existing licensed project site, coordinate issues may also arise.

The investor should compare the proposed battery location with the coordinates appearing in existing project documentation.

Where additional land must be incorporated into the facility, corresponding license and project amendments may become necessary.

This should be resolved before the battery site is purchased or leased.

Zoning Requirements

Battery installations can create separate planning issues.

The investor should determine whether the existing zoning status of the generation site permits the proposed storage infrastructure.

This is especially important where the BESS occupies a substantial area or additional parcels are required.

The fact that land is already used for a solar or wind project does not automatically establish that every additional storage structure can be constructed without further planning analysis.

Construction Permits

Battery containers and associated infrastructure can also create construction-permit requirements.

The investor should therefore review the proposed physical configuration with both energy-regulatory and construction-law requirements in mind.

A common mistake is obtaining the energy-side approval and assuming that construction can immediately begin.

The safer approach is to coordinate:

EMRA → Grid → Land → Zoning → Construction → Technical Approval → Acceptance.

Environmental Requirements

Battery projects should also be reviewed under the environmental framework applicable to the particular installation.

The investor should determine whether the existing project’s environmental documentation adequately covers the proposed storage facility or whether additional procedures are required.

This becomes particularly important for large-scale battery projects.

The legal team should compare the project described in existing environmental documents with the facility that will exist after the BESS is installed.

Fire Safety Is a Major BESS Issue

Battery storage introduces risks that differ from conventional solar and wind equipment.

Depending on battery chemistry and design, issues can include thermal runaway, fire propagation and emergency-response requirements.

Accordingly, the investor should investigate:

Battery Chemistry → Container Design → Fire Detection → Fire Suppression → Separation Distances → Emergency Access → Monitoring Systems → Applicable Technical Standards.

For acquisition purposes, fire-safety compliance should form part of technical and legal due diligence.

Insurance Coverage

Existing power plant insurance may not automatically provide adequate coverage for a new BESS facility.

The investor should review whether existing policies cover:

battery equipment,

fire,

business interruption,

machinery breakdown,

electrical damage,

and potential third-party liabilities.

Insurers may also impose specific technical conditions before providing coverage.

The insurance analysis should therefore begin during project development rather than after commissioning.

EPC Contract for Battery Storage

Adding BESS to an existing operating plant creates substantial construction-interface risk.

The battery EPC contract should clearly allocate responsibility for:

Design → Procurement → Installation → Grid Integration → Testing → Commissioning → Performance → Delay → Defects.

The contractor’s responsibilities should correspond with the regulatory and technical requirements imposed on the project company.

Battery Performance Guarantees

BESS transactions require warranties that differ from conventional generation projects.

Important performance concepts can include:

Usable Capacity

Round-Trip Efficiency

Availability

Degradation

Cycle Life

State of Health

Response Time

The EPC or battery supply contract should establish how these metrics are tested.

A battery can remain physically operational while its commercial value deteriorates because usable capacity has degraded substantially.

Battery Degradation

Battery degradation should therefore be incorporated into long-term financial modelling.

A 100 MWh battery will not necessarily provide the same usable capacity throughout its entire operating life.

The investor should review:

manufacturer warranties,

expected degradation curves,

cycle assumptions,

temperature assumptions,

and replacement obligations.

Overly optimistic degradation assumptions can materially inflate project valuation.

Warranty Claims

Foreign investors purchasing an existing BESS-equipped project should obtain all manufacturer and EPC warranties.

The buyer should verify whether warranties are transferable following a share or asset transaction.

It should also investigate:

Previous Warranty Claims → Battery Replacements → Performance Failures → Software Problems → Fire Events → Manufacturer Notices.

A project containing recently installed batteries can still have substantial latent technical risk.

Software and Energy Management Systems

Modern battery projects depend heavily on software.

The Energy Management System controls charging and discharging decisions and can be essential to the project’s commercial strategy.

Foreign investors should therefore review:

Software Ownership → License Duration → Cybersecurity → Remote Access → Data Ownership → Vendor Dependence → Termination Rights.

The physical battery should not be valued separately from the software required to operate it effectively.

Cybersecurity

Battery systems are digitally controlled infrastructure.

Remote access, cloud platforms and automated dispatch systems can create cybersecurity risks.

The investor should determine who can remotely control the BESS and what happens if the software provider’s services become unavailable.

Cybersecurity provisions should also be addressed in vendor and O&M contracts.

O&M Agreement

Battery maintenance requirements differ from wind and solar generation equipment.

The investor should establish who is responsible for:

battery monitoring,

thermal management,

software updates,

cell replacement,

preventive maintenance,

and emergency response.

The O&M agreement should also coordinate with manufacturer warranty conditions.

Failure to follow prescribed maintenance procedures can potentially affect warranty coverage.

Existing Project Finance

A power plant subject to project finance may require lender involvement before storage is added.

Financing agreements can restrict:

additional indebtedness,

material construction,

changes to project assets,

changes to project contracts,

and modifications to the generation facility.

The investor should therefore review lender-consent requirements before entering into a BESS EPC contract.

Existing Security Package

Battery equipment may also become part of the lender’s security package.

The investor should determine whether existing mortgages, commercial-enterprise pledges or other security arrangements extend to newly installed storage assets.

This becomes particularly important where separate financing is proposed for the battery project.

Different lenders may seek competing security rights.

Acquiring a Power Plant With Battery Storage

Foreign investors buying an existing BESS-equipped project should conduct separate storage due diligence.

The buyer should identify:

BESS MW → BESS MWh → Battery Technology → Installation Date → License Status → Grid Status → Accepted Capacity → Warranty → Degradation → EPC → O&M → Insurance → Software → Land → Permits.

The storage system should not simply appear as one line in the general technical asset list.

Buying a Plant With a Planned Battery Addition

A different issue arises where the seller has not yet installed the battery.

Suppose a foreign investor is buying a 100 MW wind farm and the seller states that the project is capable of adding a 100 MW battery.

The buyer should determine whether this means:

Battery Technically Possible

or

Battery Regulatory Application Filed

or

License Amendment Obtained

or

Grid Opinion Obtained

or

Battery Fully Permitted.

These are completely different stages of development.

The acquisition price should reflect the actual stage.

Battery Approval as a Condition Precedent

If storage represents a significant part of the investment thesis, obtaining the necessary regulatory position can potentially become a condition precedent to closing.

For example:

Required License Amendment → Grid Position → Land Rights → Closing.

This protects the buyer from paying for storage potential that later proves impossible to implement.

Deferred Consideration

Another solution is to separate the purchase price.

The buyer can pay for the existing operating plant at closing and pay additional consideration when the battery project reaches agreed milestones.

For example:

Existing Power Plant → Initial Purchase Price

Storage License Amendment → Additional Payment

Grid Approval → Additional Payment

BESS Commissioning → Final Payment

This can significantly reduce development-risk disputes between buyer and seller.

Unauthorized Battery Storage

A serious due diligence issue arises where the seller has already installed storage without completing the necessary regulatory procedures.

The buyer should establish:

whether a license amendment was required,

whether grid approval exists,

whether construction permits exist,

whether the battery has completed acceptance,

and whether historical operation creates regulatory exposure.

The investor should not assume that physical operation proves legal compliance.

2026 Regulatory Development

Turkey’s storage rules continued to evolve immediately before 2026.

Amendments published on December 29, 2025 expanded the Electricity Market Storage Activities Regulation, including new provisions concerning storage associated with unlicensed electricity generation facilities. The consolidated storage regulation currently reflects changes effective from January 1, 2026. (LEXPERA)

Foreign investors should therefore ensure that storage due diligence is based on the current 2026 framework, rather than transaction reports prepared several years earlier.

Example: Existing Solar Plant Adds BESS

A foreign investor owns an operating solar facility and proposes adding a 50 MW / 100 MWh battery.

Before ordering the equipment, the project should determine the licensing structure, grid requirements, land availability, construction position, environmental implications, fire-safety requirements and treatment of electricity charged from and discharged to the grid.

The battery’s commercial model should be prepared only after these regulatory assumptions have been verified.

Example: Wind Farm Adds Storage and Additional Wind Capacity

An operating wind farm proposes installing a 40 MW battery while also increasing wind generation capacity.

This can fall within the specific regulatory framework linking storage commitments with capacity increases for existing wind and solar projects. (LEXPERA)

The investor should analyze the storage unit and additional wind capacity together, including connection opinions and license amendments.

Example: Foreign Investor Buys a “Battery-Ready” Solar Plant

A seller markets a solar project as “battery ready” and attributes substantial value to future storage revenues.

Due diligence reveals that no license amendment has been obtained and the proposed battery area is located on land outside the existing project site.

The buyer should treat the battery as development potential rather than an approved project.

The purchase price should reflect that distinction.

Example: BESS Already Installed but Not Accepted

A foreign investor acquires a power plant containing newly installed battery containers.

The equipment exists physically, but the regulatory and commissioning process is incomplete.

The buyer should distinguish:

Installed BESS → Commissioned BESS → Accepted BESS → Legally Operational BESS.

Physical completion alone should not determine acquisition value.

Major Battery Storage Red Flags

Foreign investors should investigate carefully where there is storage installed without a clear license amendment, unclear grid approval, BESS capacity inconsistent with regulatory documentation, additional generation capacity dependent on unresolved storage approval, insufficient land, missing construction permits, inadequate fire-safety documentation, expired battery warranties, abnormal degradation, weak performance guarantees, non-transferable software licenses, missing insurance coverage or acquisition valuations based on unapproved storage revenues.

Any of these issues can materially affect investment value.

Battery Storage Due Diligence Checklist

Before adding storage to or acquiring an existing Turkish power plant, the investor should verify:

Generation License → Storage Structure → EMRA Amendment → BESS MW → BESS MWh → Grid Connection → Charging Rights → Discharging Rights → Generation Capacity Increase → Land → Coordinates → Environmental Position → Zoning → Construction Permits → Fire Safety → EPC → Manufacturer Warranty → Degradation → O&M → Software → Cybersecurity → Insurance → Financing → Acceptance → Commercial Operation.

The legal, technical and financial reviews should be performed together.

A technically excellent battery can still represent a poor investment if its grid or licensing structure prevents the commercial strategy assumed in the financial model.

Frequently Asked Questions

1. Can battery storage be added to an existing licensed power plant in Turkey?

Yes. Turkish electricity-market regulation expressly recognizes electricity storage units integrated into licensed generation facilities. (LEXPERA)

2. Is an EMRA license amendment required?

Depending on the project structure, adding integrated storage can require amendment of the existing preliminary license or generation license. EMRA has established specific amendment procedures for integrated storage. (EPDK)

3. Can a solar plant add battery storage?

Yes, subject to the applicable licensing, grid, technical and project-permitting requirements.

4. Can a wind farm add battery storage?

Yes. Existing wind facilities may also have additional opportunities under the regulatory provisions connecting storage commitments with renewable capacity increases. (LEXPERA)

5. Does installing a battery automatically increase grid capacity?

No. Battery capacity and grid connection capacity are different concepts.

6. Can a battery charge electricity from the grid?

The applicable framework recognizes grid charging in relevant structures, but the regulatory and settlement consequences must be examined carefully.

7. Does electricity charged from the grid receive YEKDEM support when discharged?

It should not automatically be treated as supported renewable generation. The storage regulation specifically excludes grid electricity stored and subsequently returned from benefiting from the support applicable to the generation facility’s own renewable production in the relevant circumstances. (LEXPERA)

8. Can adding storage allow a wind or solar project to increase generation capacity?

Potentially. The Electricity Market Licensing Regulation contains a mechanism allowing qualifying operating wind and solar license holders committing to storage to seek capacity increases up to the committed storage capacity, subject to applicable conditions. (LEXPERA)

9. Should a foreign buyer pay extra for a “battery-ready” project?

Only after determining what “battery ready” actually means. Regulatory approval, grid position, land rights and permits should be verified before assigning substantial value to future storage capacity.

10. What is the biggest risk when adding battery storage to an existing plant?

Assuming that because the existing generation facility is fully licensed, the battery can automatically be installed and commercially operated under the same approvals.

Legal Support for Battery Storage Projects in Turkey

Battery storage can significantly increase the strategic value of an existing renewable energy asset, particularly where it is combined with wind or solar generation and a valuable grid connection. However, the investment should be assessed across licensing, grid, land, construction, contractual and technical requirements before equipment is purchased.

Firat Fesih Kaya Law Office assists foreign investors, international energy companies and renewable-energy developers with battery storage and power plant investments in Turkey. Firat Fesih Kaya can assist with storage regulatory due diligence, generation-license amendments, BESS project acquisitions, capacity-increase structures, grid-risk analysis, EPC and battery supply agreements, SPA negotiations and acquisition due diligence.

For a foreign investor, the key question is not simply “Can a battery be installed at this power plant?” The correct question is: “Can this battery be licensed, connected, constructed, accepted and operated in the exact commercial structure assumed by the investment model?”

Phone: +90 312 434 22 22
Mobile Phone: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yildirim Tower, Balgat, Cankaya / Ankara, Turkey