Cat builds a 5 kW photovoltaic system

One of the most frequently asked questions about solar energy technology concerns the amount of electricity that a solar panel system can produce. This curiosity becomes even greater as there are significant variations in the production of electricity provided by the various configurations of photovoltaic panels.

Among the many solar energy capture systems, 5 kW photovoltaic systems have attracted the attention of both individual households and businesses by offering an efficient way to convert sunlight into useful electricity. Typically a 5 kW solar system can produce around 20 kWh per day, or 600 kWh per month. However, photovoltaic energy production differs from season to season. Find out in the lines below what we are talking about!

How does a 5kW photovoltaic system work?

A 5 kW photovoltaic system works on the principle of converting sunlight into electricity. This process, known as the photovoltaic effect, occurs in solar panels. Solar panels are made up of photovoltaic cells, made of semiconductor materials, usually crystalline silicon. When sunlight hits the semiconductor material, electrons are released and generated direct current (CC).

The direct current produced by the solar panels is then converted into alternating current (AC) from the inverter. Alternating current is the form of electricity used in homes and the electrical grid. The inverter converts direct current into alternating current so that it can be used in real time or transmitted to the electrical grid.

The components of a 5 kW solar system include:

• solar panels;
• the inverter;
• accumulators;
• the fixing system;
• charge regulator;
• solar cables and battery cables;
• connectors;
• in the case of off-grid systems, batteries for energy storage.

Advantages of 5 kW solar panels

1. Electricity bill reduction: a 5 kW solar panel system can produce a significant amount of electricity, depending on the efficiency of the solar panels.
2. Energy independence: with a solar panel system the family becomes less dependent on fluctuations in electricity prices and energy suppliers. If accumulators are also used, the house can function independently for a certain period.
3. Reduced ecological impact: Using solar energy reduces greenhouse gas emissions and helps protect the environment.

Calculation of solar energy production

Let’s take the example of a family with household energy consumption the 400 kWh. Let’s calculate how much of this consumption could be covered by a 5 kW solar system:

Estimate of photovoltaic electrical production:

• let’s assume that the family is located in an area with an average annual solar radiation of 1,200 kWh/kW installed;
• the annual energy production of the solar system would be:

5 kW × 1,200 kWh/kW = 6,000 kWh

Monthly consumption coverage:

• the annual consumption of the family is: 400 kWh/month × 12 months= 4,800 kWh;
• Therefore, a 5 kW solar system could cover the entire energy consumption of the family, with a surplus of: 6,000 kWh/year − 4,800 kWh/year= 1,200 kWh/year;
• this surplus could be resold to the grid or used to power other electrical equipment (e.g. an electric car).

Do you want to know more? Access the article on solar system efficiency!

How much energy does a 5 kW photovoltaic system produce?

A 5 kW photovoltaic system can produce, on average, approx 20 kWh per day under ideal conditions and per year can generate between 4,500 kWh e 6000 kWh. This amount varies depending on location, weather conditions and orientation of the panels. However, the advantages of renewable energy cannot be ignored, and the power produced by a 5 kW system can be sufficient to satisfy the needs of a medium-large family.

The size of the system plays a key role in determining the number of solar panels needed to achieve a given output. TO examplea 5 kW solar system could involve the use of approximately 10 photovoltaic panels, each with a nominal power of 280 W. In this context, each solar panel will have a size of approximately 1.9 meters in length and 1 meter in width. Therefore, to ensure adequate space for this system, you will need to have at least 20 square meters of surface area available on the roof of your home or building.

How much does a 5 kW photovoltaic system produce depending on the months of the year?

The production of solar energy in Romania and implicitly of a 5 kW photovoltaic system can vary greatly depending on the months of the year and the quality of the photovoltaic system installation. These variations are determined by several factors, including the average number of sunny days per year, the average air temperature and the average soil temperature.

According to studies, in Romania, it is recommended that solar panels have a south orientation and inclination of 34-35 degrees. As a reference point, the optimal tilt angle is calculated by adding 15 degrees to the latitude in winter and subtracting the same number of degrees in summer. [1]

How much does a 5 kW solar system produce in winter?

Depending on the region, a photovoltaic system can produce on average:

• between 202 and 276 kWh in December;
• between 217 and 295 kWh in January;
• between 300 and 339 kWh in February.

How much does a 5 kW domestic photovoltaic system produce in spring?

Depending on sunlight, region and weather conditions, a 5 kW solar system can produce on average:

• between 479 and 540 kWh in March;
• between 549 and 635 kWh in April;
• between 572 and 682 in May.

How much does a 5 kW solar system produce in summer?

Taking into account the same coordinates we talked about above, a photovoltaic system of this type can produce, on average:

• between 586 and 669 kWh in June;
• between 634 and 732 kWh in July;
• between 640 and 748 kWh in August.

However, it must be kept in mind that temperature has an impact on solar production! Solar panels have a temperature coefficient, which shows how much their efficiency decreases when the temperature rises above a reference value (usually 25°C). This coefficient is expressed as a percentage decrease in efficiency for each degree Celsius above this value.

How much does a 5 kW photovoltaic system produce in autumn?

On average, solar panels for a home can produce:

• between 541 and 602 kWh in September;
• between 445 and 480 kWh in October;
• between 263 and 346 kWh in November. [2]

Factors that influence the efficiency of solar panels

Factors that affect the efficiency of solar panels can directly influence the energy production of a 5 kW photovoltaic system. Here they are:

1. Technical characteristics of photovoltaic panels: Efficiency of a solar panel is defined as the ratio between the energy produced and the solar energy received. Technical features such as type of solar panel AND the technologies usedcan influence its efficiency. Solar panels using technology Half a cell AND PERC cells They are known for their increased efficiency due to their advanced mode of operation. The costs of the photovoltaic system with these technologies can be higher.
2. Installation of photovoltaic panels: Orientation and inclination of solar panels can have a significant impact on their efficiency. In the Northern Hemisphere, solar panels should face south for maximum efficiency, while in the Southern Hemisphere, northern exposure is preferred.
3. Inverter efficiency: The inverter is the key component that converts the direct current produced by solar panels into alternating current that can be used in the electricity grid. The efficiency of an inverter refers to the amount of energy it can convert without being wasted as heat. An inverter with a higher efficiency will ensure more efficient conversion and, consequently, greater electricity production.
4. Solar cables: The quality and type of solar cables used in the system can affect its efficiency. The cables must be thick enough to carry the electrical current without significant losses. The use of quality cables and their correct sizing will minimize energy losses and help increase the efficiency of the system.

Take advantage of green energy and purchase a 5 Kw solar system through the Casa Verde program!

Green House Program 2024 represents an excellent opportunity for those who want to adopt clean and sustainable energy sources. With a generous budget of 2 billion lei, the program aims to support Romanians in installing photovoltaic panels, thus helping to reduce dependence on fossil fuels and fight climate change.

Through Casa Verde 2024, you can benefit from financing of 30,000 lei for the installation of a minimum 3 kW solar systemand a 5 kW system will give you significant long-term savings. To access these funds you will have to contribute with an actual amount of 3,000 leiand after completion of the installation and receipt of the works, the Environmental Fund Agency (AFM) will pay the amount of 30,000 lei, according to the financing contract.

With such a system you will be able to generate a significant part of the energy needed for your home, significantly reducing the costs of your electricity bill and actively contributing to environmental protection. Don’t miss this opportunity! Check the registration details and make sure you are among them 60,000 beneficiaries who will be able to benefit from green energy in 2024!

Investing in a 5 kW photovoltaic system can make a significant difference in the energy savings you can achieve. With a wide range of options, our team can guide you in making the best choice for your needs. Gain energy independence and discover the pleasure of using green energy! Choose electronic accumulators for efficient and sustainable solutions!