Learn how customs disputes involving solar panels, wind turbines, battery systems, and renewable energy equipment are resolved in Turkey. This 2026 legal guide explains customs valuation, tariff classification, origin disputes, anti-dumping measures, customs penalties, post-clearance audits, and legal remedies for foreign investors.

Turkey’s renewable energy sector has experienced remarkable growth over the past decade, with significant foreign investment in solar power plants (GES), wind farms (RES), battery energy storage systems (BESS), hydrogen facilities, hybrid renewable energy projects, substations, and electric vehicle charging infrastructure. Most of these projects rely on imported equipment, making customs compliance one of the most critical legal issues for international investors.

Disputes with Turkish Customs authorities may arise at any stage of the import process—from customs declaration and tariff classification to post-clearance audits and administrative penalties. A single customs dispute involving high-value equipment such as solar panels, wind turbine components, transformers, or battery systems can delay project completion, increase financing costs, and jeopardize contractual obligations under EPC Contracts and Power Purchase Agreements.

Customs disputes involving renewable energy equipment are generally governed by:

• Customs Law No. 4458
• Turkish Commercial Code No. 6102
• Turkish Code of Obligations No. 6098
• Electricity Market Law No. 6446
• Renewable Energy Law No. 5346
• Foreign Trade Legislation
• Product Safety and Technical Regulations
• EMRA (EPDK) Regulations
• International customs agreements applicable to Turkey.

This 2026 Updated Legal Guide explains the most common customs disputes affecting renewable energy projects in Turkey and the legal remedies available to foreign investors.

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Why Customs Disputes Matter

A customs dispute can lead to:

• Delayed customs clearance.
• Additional customs duties.
• Administrative fines.
• Equipment detention.
• Project construction delays.
• Increased financing costs.
• EPC contractor claims.
• Loss of contractual incentives.
• Insurance complications.

Because renewable energy projects operate under strict construction schedules, even short customs delays may have significant financial consequences.

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Common Renewable Energy Equipment Subject to Customs Disputes

Disputes frequently involve:

• Solar photovoltaic (PV) panels.
• Wind turbine generators.
• Rotor blades.
• Towers.
• Inverters.
• Transformers.
• Battery Energy Storage Systems (BESS).
• High-voltage switchgear.
• Medium-voltage equipment.
• Power cables.
• SCADA systems.
• EV charging stations.
• Hydrogen production equipment.

These products often require extensive technical documentation.

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1. Tariff Classification (HS Code) Disputes

One of the most common customs disputes concerns tariff classification.

Incorrect classification may result in:

• Additional customs duties.
• Administrative penalties.
• Delayed customs release.
• Post-clearance reassessments.

Technical specifications, product catalogs, engineering drawings, and laboratory reports are often required to support the declared classification. Customs authorities have broad powers under the Turkish Customs Law to examine declarations and reassess tariff classifications where necessary.

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2. Customs Valuation Disputes

Turkish Customs authorities may challenge:

• Declared purchase price.
• Freight charges.
• Insurance costs.
• Royalty payments.
• License fees.
• Related-party transactions.
• Assists.

Post-import valuation adjustments are common in renewable energy projects involving multinational corporate groups. Under Turkish customs valuation rules, certain post-import costs—such as construction, assembly, maintenance, or technical assistance performed after importation—are generally excluded from customs value when separately identified.

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3. Origin Disputes

Origin-related disputes often involve:

• Certificate of Origin.
• Preferential origin claims.
• Supplier declarations.
• Manufacturing location.
• Substantial transformation.

Loss of preferential treatment may significantly increase project costs.

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4. Additional Customs Duties

Importers may face:

• Additional customs duties.
• Anti-dumping duties.
• Countervailing duties.
• Safeguard measures.

Before signing procurement contracts, investors should verify whether the equipment is subject to any trade defense measures.

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5. Anti-Dumping Investigations

Renewable energy equipment imported from certain jurisdictions may become subject to:

• Anti-dumping investigations.
• Retroactive duty assessments.
• Import restrictions.

Supply contracts should allocate responsibility for unexpected trade remedies.

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6. Product Safety Disputes

Turkish authorities may question:

• CE conformity.
• Technical documentation.
• Safety certifications.
• Product labeling.
• User manuals.

Many renewable energy products must comply with applicable CE marking and technical conformity requirements before they may be placed on the Turkish market.

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7. Technical Compliance

Imported equipment should comply with:

• IEC standards.
• EN standards.
• Grid connection requirements.
• Manufacturer specifications.
• EMRA technical requirements.

Technical incompatibility may delay project commissioning.

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8. Customs Seizure and Detention

Customs authorities may temporarily detain goods due to:

• Documentation deficiencies.
• Classification disputes.
• Valuation concerns.
• Product safety issues.
• Regulatory investigations.

Prompt legal intervention often helps minimize storage costs and project delays.

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9. Post-Clearance Audits

Turkish Customs authorities regularly conduct:

• Valuation audits.
• Classification reviews.
• Origin verification.
• Documentation inspections.

Importers should maintain complete customs documentation because post-clearance audits may occur after the equipment has already entered the project.

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10. Customs Administrative Penalties

Penalties may arise from:

• Incorrect declarations.
• Undervaluation.
• Incorrect tariff classification.
• False documentation.
• Failure to maintain records.

Administrative fines may be challenged through the appropriate legal procedures.

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11. Import Documentation

Foreign investors should preserve:

• Commercial invoices.
• Packing lists.
• Bills of lading.
• Certificates of Origin.
• Technical specifications.
• Insurance certificates.
• Purchase contracts.
• Payment records.

Accurate documentation significantly reduces customs disputes.

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12. EPC Contract Implications

Customs delays may affect:

• Construction schedules.
• Milestone completion.
• Commercial Operation Date (COD).
• Delay damages.
• Contractor claims.

EPC Contracts should allocate customs-related risks clearly.

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13. Project Finance Considerations

Project lenders often require:

• Evidence of customs compliance.
• Updated project schedules.
• Delay notifications.
• Revised financial forecasts.

Failure to manage customs disputes promptly may affect financing arrangements.

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14. EMRA Compliance

Delays involving imported equipment may affect:

• Generation licensing.
• Grid connection deadlines.
• Technical inspections.
• Regulatory compliance.

Developers should coordinate customs strategy with regulatory obligations.

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15. Product Liability

Imported equipment may generate disputes involving:

• Manufacturing defects.
• Design defects.
• Product recalls.
• Warranty claims.

Supply agreements should contain robust indemnity provisions.

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16. Warranty Protection

Importers should verify:

• Manufacturer warranties.
• Performance guarantees.
• Replacement procedures.
• Cross-border enforcement.

Warranty rights should survive customs clearance.

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17. Insurance Claims

Relevant insurance policies include:

• Marine Cargo Insurance.
• Construction All Risk (CAR).
• Delay in Start-Up (DSU).
• Product Liability Insurance.

Insurers should be notified promptly if customs disputes affect project delivery.

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18. Customs Appeals

Foreign investors may challenge:

• Additional duty assessments.
• Administrative fines.
• Tariff classification decisions.
• Customs valuation adjustments.
• Origin determinations.

Because customs decisions are administrative acts, they are subject to judicial review under Turkish law.

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19. Alternative Dispute Resolution

Commercial disputes between importers and suppliers may be resolved through:

• Negotiation.
• Mediation.
• ICC Arbitration.
• LCIA Arbitration.
• SIAC Arbitration.
• ISTAC Arbitration.

Customs disputes with public authorities generally follow administrative objection and judicial review procedures rather than commercial arbitration.

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20. Litigation Before Turkish Courts

Where administrative remedies do not resolve the dispute, importers may seek judicial review of customs decisions before the competent courts in accordance with Turkish administrative and customs law.

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Top 30 Legal Checks Before Importing Renewable Energy Equipment

1. Verify HS Code.
2. Review customs valuation.
3. Confirm origin documentation.
4. Check preferential tariff eligibility.
5. Verify CE conformity.
6. Review technical standards.
7. Conduct supplier due diligence.
8. Review anti-dumping measures.
9. Confirm import permits.
10. Review customs declarations.
11. Verify insurance.
12. Review Incoterms®.
13. Analyze EPC obligations.
14. Review financing documents.
15. Preserve customs records.
16. Verify warranty documentation.
17. Conduct sanctions screening.
18. Review product safety rules.
19. Confirm environmental compliance.
20. Verify EMRA compatibility.
21. Prepare for customs audits.
22. Establish document retention procedures.
23. Assess tax implications.
24. Review dispute resolution clauses.
25. Monitor customs deadlines.
26. Prepare expert technical reports.
27. Coordinate logistics.
28. Notify lenders if delays occur.
29. Develop a customs compliance program.
30. Obtain specialist Turkish legal advice.

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Common Mistakes Made by Foreign Investors

Foreign investors frequently:

• Declare incorrect HS Codes.
• Underestimate customs valuation risks.
• Fail to verify origin documentation.
• Ignore CE conformity requirements.
• Use incomplete customs documentation.
• Accept weak warranty provisions.
• Delay responding to customs inquiries.
• Ignore post-clearance audit obligations.
• Fail to coordinate customs strategy with EPC schedules.
• Delay obtaining legal advice.

These mistakes often lead to avoidable penalties and costly project delays.

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Best Practices Before Importing

Before importing renewable energy equipment into Turkey:

• Conduct comprehensive customs due diligence.
• Verify tariff classification.
• Review customs valuation methodology.
• Confirm product conformity documentation.
• Coordinate procurement and EPC schedules.
• Preserve complete customs records.
• Review insurance and financing implications.
• Develop a customs compliance strategy.
• Obtain specialist Turkish legal advice.

Early legal planning significantly reduces the likelihood of customs disputes.

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Why Professional Legal Assistance Is Essential

Renewable energy customs disputes require expertise in:

• Turkish Customs Law.
• Foreign Trade legislation.
• Turkish Commercial Code.
• Turkish Code of Obligations.
• Electricity Market Law.
• EMRA regulations.
• International trade law.
• Administrative litigation.

An experienced Turkish energy and customs lawyer can:

• Review import structures.
• Challenge customs duty assessments.
• Defend post-clearance audits.
• Resolve tariff classification disputes.
• Advise on customs valuation.
• Protect warranty and contractual rights.
• Represent importers before customs authorities and courts.
• Coordinate customs compliance with renewable energy investments.

Professional legal assistance helps foreign investors avoid costly delays while ensuring full compliance with Turkish customs and energy legislation.

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Frequently Asked Questions

1. What are the most common customs disputes involving renewable energy equipment?

The most common disputes involve tariff classification (HS Codes), customs valuation, origin of goods, additional customs duties, anti-dumping measures, product conformity, and post-clearance audits.

2. Can Turkish Customs reassess import duties after the equipment has been released?

Yes. Turkish Customs authorities may conduct post-clearance audits and reassess customs value, tariff classification, origin, or other declaration elements if they identify potential non-compliance.

3. Can imported solar panels or wind turbines be detained by customs?

Yes. Equipment may be temporarily detained if customs authorities identify deficiencies in documentation, valuation, tariff classification, origin, or compliance with applicable product safety regulations.

4. How can foreign investors reduce customs risks?

By conducting customs due diligence before shipment, verifying HS Codes, maintaining complete documentation, confirming product conformity, negotiating comprehensive supply contracts, and obtaining legal advice before importation.

5. Can customs penalties be challenged?

Yes. Importers may object to customs assessments and administrative fines and, where appropriate, seek judicial review before the competent Turkish courts.

6. Are customs disputes linked to EPC project delays?

Frequently. Delayed customs clearance may postpone delivery of critical equipment, affecting construction milestones, Commercial Operation Dates (COD), financing obligations, and contractual performance.

7. Do renewable energy imports require compliance with Turkish technical regulations?

Yes. Depending on the equipment, compliance with applicable technical regulations, product safety rules, and CE conformity requirements may be necessary before the goods can be lawfully placed on the Turkish market.

8. Why should foreign investors hire a Turkish energy and customs lawyer?

A Turkish energy and customs lawyer can review import structures, verify customs compliance, resolve tariff classification and valuation disputes, defend post-clearance audits, challenge administrative penalties, coordinate customs strategy with EPC and financing documentation, and represent investors before customs authorities and Turkish courts.

Legal Support – Contact Our Energy and Customs Lawyers

Customs disputes involving renewable energy equipment can delay construction, increase project costs, and disrupt financing. Early legal intervention, thorough customs compliance, and effective dispute management are essential to protect investment value and maintain project schedules.

Fırat Fesih Kaya and our legal team advise foreign investors, renewable energy developers, EPC contractors, infrastructure funds, multinational corporations, equipment manufacturers, suppliers, and institutional investors on customs disputes, import compliance, customs audits, renewable energy investments, EMRA compliance, international supply agreements, administrative litigation, international arbitration, and all aspects of Turkish energy and commercial law.

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Office Phone: +90 312 434 22 22

Email: info@firatfesihkaya.av.tr

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