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Required Materials and Components

Every component you need to set up a solar energy system is important for the system to work efficiently and safely. In this section, we will discuss in detail the main hardware parts we will use in the project, their basic functions and their connections to the system.

Solar Panels (Photovoltaic Modules)

Solar panels are the basic building blocks of solar energy systems. They convert sunlight directly into electrical energy and directly affect the overall efficiency of the system. Therefore, choosing the right panel is critical to system performance and return on investment.

📌Solar Panel Working Principle

Solar panels consist of photovoltaic cells. The sunlight falling on these cells is converted directly into direct current (DC) by the semiconductor material (usually silicon) inside. This energy obtained is converted into alternating current by the inverter and can be used at home.

🔍Panel Types and Features

Today, three basic types of panels stand out:

1. Monocrystalline Panels

  • It has a high efficiency rate (usually 18% - 22%).

  • It is aesthetically black in color and provides higher production in more compact areas.

  • Its cost is slightly higher than polycrystalline, but it is more efficient in the long run.

  • Ideal for users with limited roof space.

2. Polikristal Paneller

  • Its efficiency is lower (between 15% and 17%).

  • It is usually in shades of blue and costs less.

  • It is preferred when cost-effective energy production is desired in large areas.

  • Performance degradation in hot weather is slightly greater than monocrystalline.

3. Thin Film Panels

  • Thanks to their flexible structures, they are suitable for special applications.

  • Their efficiency is low (10% - 13%), but they are more resistant to hot weather conditions.

  • Thanks to their lightweight structure, they offer ease of transportation and installation.

🔧 Things to Consider When Choosing a Panel

  • Total Electricity Consumption: Your daily or monthly energy needs determine the number of panels to be installed.

  • Available Area: Roof or land size has a direct impact on panel type and placement.

  • Panel Power (Watt): A typical panel is in the range of 400–600 W.

  • Efficiency Value: Indicates how much the panel converts light into electricity.

  • Manufacturer Warranty: Quality panels typically offer a 10–15 year product warranty and a 25 year performance warranty.

  • Temperature Coefficient: Shows how much efficiency the panel loses under high temperatures. The lower the coefficient, the better.

☀️ Panel Placement and Mounting Angle

  • The panels should be positioned so that they receive the most efficient sunlight throughout the day.

  • The ideal angle of inclination for Türkiye is generally 5–10 degrees higher than your latitude (for example, 35–40° for Istanbul).

  • The south facade provides the highest efficiency. Installation should be done in an area that is not shaded.

🛡️ Durability and CertificatesDurability and Certificates

  • Solar panels are designed to withstand outdoor conditions (IP65 and above protection level is ideal).

  • International standards such as IEC 61215 and IEC 61730 should be sought for quality panels.

📈 Sample Calculation

  • Your monthly consumption: 450 kWh

  • Average sunshine duration: 5 hours/day

  • Required daily production: 15 kWh

  • An average of 2.75 kWh is produced per day with a 550 W panel.

  • Number of panels required ≈ 6 pieces (rounded up to 7 is recommended)

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