How Many MegaW Can Your Factory Roof Generate? Industrial Rooftop Solar Power Facts in 2026
The metal roof on your factory might still be going to waste today. Yet, that same roof, if properly designed... industrial rooftop solar power With this project, you can generate hundreds of thousands of kWh of energy annually, bring your electricity bill close to zero, and provide guaranteed income for 25 years. As of 2026, Türkiye's energy costs have created the most attractive period for renewable energy investments. In this guide, we answer the question clearly: How many megawatts does your factory roof generate, and when will this investment pay for itself?
CONTENTS
1. Global Solar Energy Potential: Why Now?
Solar energy will surpass coal in global electricity production for the first time by 2025. According to data from the International Energy Agency (IEA), this figure will be reached worldwide in 2025 alone. Over 400 GW New solar capacity has been commissioned. This figure is close to the total installed capacity of all nuclear power plants. But the real question for you is: How can Turkish industrialists benefit from this global transformation?
As seen on the map, Türkiye, 1,400–1,600 kWh/m²/year With GHI values between these figures, Turkey has almost twice the solar energy potential of Germany. While Germany is projected to reach 90 GW of installed solar capacity in 2024, Turkey is still only utilizing a small fraction of this potential. This gap presents a challenge for industrial investors. a historic window of opportunity This means...
The continuous rise in electricity prices means that solar energy is no longer a "green choice,", a necessary cost optimization tool haline getirmiştir. 2023-2026 arasında Türkiye sanayi elektrik tarifelerindeki kümülatif artış %180’i aştı. Bu dinamik, çatı GES yatırımlarının geri ödeme süresini dramatik biçimde kısalttı.
2. Türkiye Solar Atlas: Where is your factory located?
Türkiye's solar potential is not evenly distributed. The Ministry of Energy and Natural Resources... GEPA (Solar Energy Potential Atlas) The data reveals that annual sunshine hours vary between 1,971 and 3,017 hours from region to region.
Regional Solar Radiation Data and Production Potential
| Area | Annual Sunshine | GHI (kWh/m²/year) | 1 kWp Production | Example Provinces |
|---|---|---|---|---|
| Southeastern Anatolia ★★★★★ | 2,900–3,017 hours | 1.900+ | 1,700–1,900 kWh | Konya, Adana, Gaziantep |
| Mediterranean Region ★★★★★ | 2,900–3,017 hours | 1.850+ | 1,650–1,850 kWh | Antalya, Mersin, Hatay |
| Aegean Region ★★★★ | 2,600–2,746 hours | 1,600–1,750 | 1,450–1,600 kWh | Izmir, Manisa, Aydin |
| Central Anatolia ★★★★ | 2,553–2,600 hours | 1,550–1,700 | 1,400–1,550 kWh | Ankara, Kayseri, Eskişehir |
| Marmara Region ★★★ | 2,409–2,500 hours | 1,400–1,550 | 1,250–1,400 kWh | Istanbul, Bursa, Tekirdağ |
| Black Sea Region ★★ | 1,886–1,971 hours | 1,100–1,300 | 1,000–1,200 kWh | Trabzon, Rize, Samsun |
3. How Many kW Can Be Generated from Your Factory Roof? Realistic Calculation
“The question, "How much solar energy would my roof produce if I installed solar panels?", is the product of a much more technical calculation than it appears. However, this is especially true for industrial roofs. a practical rule Available: Every 1 m² of roof area corresponds to approximately 0.1 kWp of capacity, taking into account the net installable area.
Parameters Behind the Calculation
- Net Available Area: Brüt çatı alanının %60-70’i panel kurulumuna uygundur. Havalandırma bacaları, çatı geçişleri, yangın güvenliği koridorları ve gölgeleme tampon zonları için alan ayrılır.
- Panel Efficiency: 2026 itibarıyla monokristalin paneller %21-23 verimle çalışmaktadır. Her 5 m² = yaklaşık 1 kWp.
- Specific Production (PR): Sistem performans oranı endüstriyel montajda %78-85 arasındadır. Kablo kayıpları, inverter verimliliği ve kirlenme kayıpları dahildir.
Net Area = Gross Roof Area × 0.65
Capacity (kWp) = Net Area ÷ 5 m²/panel × 0.55 kWp/panel
Annual Production (kWh) = Capacity × Regional Specific Production
Sectoral Comparison
4. Will Industrial Rooftop Solar Power Plant Investment Pay Off? ROI Analysis
In the economic conditions of 2026, industrial rooftop solar power investments in Turkey are achieving the shortest payback periods in Turkish history. Those investing today, at the intersection of rising electricity prices and falling panel costs, 3.5–5.5 years They encounter repayment periods that vary.
Realistic Cost and Revenue Projection for 2026
| Parameter | 100 kWp | 500 kWp | 1,000 kWp |
|---|---|---|---|
| Required Roof Space | ~750 m² | ~3,750 m² | ~7,500 m² |
| Estimated Investment Cost | ~1,800,000 TL | ~7,500,000 TL | ~14,000,000 TL |
| Annual Energy Production (Ankara) | 140,000 kWh | 700,000 kWh | 1,400,000 kWh |
| Annual Savings (3 TL/kWh) | 420,000 TL | 2,100,000 TL | 4,200,000 TL |
| Refund Period | ~4.3 years | ~3.6 years | ~3.3 years |
| 25 Years of Net Profit | ~8,700,000 TL | ~44,000,000 TL | ~91,000,000 TL |
*Based on electricity prices in 2026 and an assumption of %5 annual increases. Actual values will vary depending on location, roof orientation, shading, and system design.
Financing Options and Incentives
- Grants and low-interest loans for SMEs.
- Renewable energy project support
- Regional investment incentives
- %15-25 hibe oranı (bölgeye göre)
- Unlicensed production rights for less than 1 MW
- Net-metering system
- VAT exemption for investment goods.
- I-REC green certificate revenue
5. Technical Requirements: Which Roof is Suitable?
The most critical technical parameters in industrial rooftop solar power installation. roof support system and load capacity. Modern roofing systems offer solutions suitable for different roof types.
Pre-installation Checklist
- Static calculation: Can the roof support system bear the additional load? (Panel + assembly ≈ 15 kg/m²)
- Roof orientation: South-facing surface? South ±30° deviation is ideal.
- Shading analysis: Baca, klima, komşu bina gölgeleri yıllık üretimi %10-25 düşürebilir.
- Electricity infrastructure: Is the transformer capacity sufficient? The connection point location needs to be determined.
- Roof age and condition: Roofs that are 10 years old or more should be inspected before installation.
- Permissions and connection: A connection application from the distribution company and a municipal building permit may be required.
6. 2026 Regulatory Guide: Legal Framework for Industrial Rooftop Solar Power Plants
Industrial rooftop solar power investments in Türkiye are addressed at multiple regulatory levels. Understanding the basic legal framework accelerates the project process and protects against unexpected obstacles.
Basic Legal Regulations
- Electricity Market Law No. 6446: It distinguishes between unlicensed production (≤1 MW) and licensed production.
- Renewable Energy Sources Regulation: The connection application regulates the principles of measurement and reconciliation.
- Regulation on Unlicensed Electricity Generation: Essential reference document for rooftop solar power systems under 1 MW.
- Energy Efficiency Law No. 5627: It includes energy efficiency audit regulations for industrial facilities.
Connection Application Process
- Technical Feasibility: Determine the connection point and submit a preliminary application to the distribution company (~1-2 weeks)
- Connection Request: Official application via TEDAŞ/relevant distribution company web portal (~1-3 months)
- Project Approval: Electrical project preparation, municipal building permit (if required)
- Setup: Installation within the scope of the approved project (2-8 weeks, depending on capacity)
- Provisional Acceptance and Metering: Distribution company inspection, bidirectional meter installation and commissioning.
7. Conclusion: Your Roof Can Be Transformed into a Power Plant
2026 itibarıyla endüstriyel çatı GES yatırımları, Türk sanayiciler için en güçlü maliyet azaltım araçlarından biri haline gelmiştir. Güneş paneli maliyetlerinin son on yılda %90 düşmesi, elektrik fiyatlarının ise aynı dönemde 6 kata çıkması, eşitsizliği yatırımcı lehine dönüştürmüştür. 10.000 m² metal trapez çatısı olan bir fabrika, bugün yatırım kararı alsa; 4 yıldan kısa sürede geri dönüş, 25 yıl boyunca net kazanç ve “yeşil üretim” sertifikasyonu elde eder.
Get a Free Feasibility Analysis
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ISOTEC Industrial Rooftop Solar Power Solutions
ISOTEC is specially developed for metal trapezoidal roofs. the ISOS and ISOTRAP With its mounting systems, it is Türkiye's leading manufacturer of industrial solar power plant mounting systems. Our aluminum profile-based systems offer quick installation, leak-proof guarantee, and 30 years of structural durability.
- ✅ Selection of a mounting system specific to the roof type
- ✅ Static load calculation and engineering support
- ✅ ISOTEC certified installation teams
- ✅ 30-year structural warranty, 15-year leak-proof warranty
- ✅ Nationwide service network in Türkiye
Bibliography and References
- Turkish Ministry of Energy and Natural Resources — GEPA Solar Energy Potential Atlas (2024)
- IEA — Renewables 2025: Analysis and Forecast to 2030
- IRENA — Renewable Power Generation Costs in 2024
- EPDK — Electricity Market Sector Report 2025
- Solargis — Global Solar Atlas 2.0 Turkey Data
- EMO (Chamber of Electrical Engineers) — Solar Energy Technical Guide
