Solar panel comparison tests: Honest reviews for your 2023 purchase decision

Types of solar panel

Seven relevant questions about solar panels

How is a solar panel installed?

The installation of a solar panel can vary depending on the type and intended use. Usually, the solar panel is installed on a suitable surface, such as a roof or a solar mounting frame. It is important that the panel is optimally aligned to the sun in order to achieve the best possible energy yield. Installation usually requires specialist knowledge and can be carried out by a qualified installer.

What advantages does a solar panel offer as a renewable energy source

Solar panels use the sun's energy as a renewable energy source. By using solar energy, you reduce your dependence on fossil fuels and help reduce greenhouse gas emissions. Solar panels offer you the opportunity to generate your own clean electricity and can result in long-term cost savings as you are less dependent on expensive mains electricity.

There are inexpensive solar panels on the market

Yes, there are a variety of inexpensive solar panels on the market. Solar panel prices vary by manufacturer, size and power. It is important that when choosing a cheap solar panel you not only look at the price but also at the quality and efficiency of the panel. Compare different offers and pay attention to reviews and experiences of other customers to find a high-quality, yet inexpensive solar panel.

How efficient are solar panels in generating electricity

The efficiency of solar panels can vary depending on the model and technology. Modern solar panels can achieve efficiencies in excess of 20 percent, which means they can convert a significant portion of the sun's energy into electrical energy. However, the efficiency of solar panels also depends on environmental factors such as solar radiation, panel orientation and possible shading. It is important to choose a panel with high efficiency to ensure optimal power production.

In which areas of application are solar panels used?

Solar panels are used in various application areas. They can be installed in homes to meet their own electricity needs and reduce dependence on the public grid. Solar panels are also used in businesses, schools and other public facilities to generate clean energy. In addition, solar panels are used to power outdoor devices such as garden lights, fountains or charging stations for electronic devices. The possible applications are diverse and range from small solar panels for personal use to large solar power plants.

Are solar panels also suitable for outdoor use?

Yes, there are special solar panels that have been developed for outdoor use. These panels are typically rugged and weather resistant to meet the demands of outdoor environments. For example, they can be used to illuminate garden paths, operate outdoor cameras or power camping equipment. Outdoor solar panels are designed to work reliably even in adverse weather conditions such as rain or snow.

Important factors when choosing a solar panel

When choosing a solar panel, you should consider several factors. These include panel performance, efficiency, size, durability, warranty, price and compatibility with your intended use. It is advisable to seek advice from a professional to choose the most suitable solar panel for your individual needs and local conditions.

What alternatives to solar panels are there?

There are various alternatives to solar panels, which also serve to use renewable energies. Some of these alternatives are:

wind turbines: Wind turbines convert the wind's energy into electrical energy and can be an effective solution in regions with sufficient wind resources.

hydroelectric power plants: Hydroelectric power plants use the power of flowing water to generate electrical energy. They are often used in rivers or on coasts.

Biomass plants: Biomass plants generate energy from organic materials such as wood, plant residues or animal manure. These materials are burned or anaerobically digested to heat or to generate electricity.

Geothermal: Geothermal energy uses the natural thermal energy from the interior of the earth. Drilling uses hot water or steam to generate energy.

How are solar panels tested

Solar panels are usually tested in specialized laboratories or test facilities. Various performance and efficiency parameters are measured during these tests to assess the quality and performance of the panels. These include performance under standard test conditions (STC), efficiency measurement, resistance to environmental influences such as temperature, humidity and UV radiation, as well as the reliability and longevity of the panels. The tests also include security checks to ensure compliance with standards and regulations.

Where are solar panels tested

Solar panels are tested by various trade magazines and institutes to evaluate their performance, efficiency and quality. Some well-known testing facilities are:

Photovoltaic institutes: Here, solar panels are tested for their electrical properties, efficiency and long-term stability.

MOT: TÜV carries out safety tests and certifies compliance with norms and standards.

Trade magazines: Specialist magazines such as "Photovoltaik" or "Solarzeitalter" carry out independent tests and regularly publish test reports on various solar panel brands and models.

How do specialist magazines evaluate
solar panels

Trade magazines typically rate solar panels based on a variety of criteria, including: Performance, efficiency, quality, reliability and value for money. They carry out tests under standardized conditions to determine the actual performance and efficiency of the panels. They also take customer ratings and experiences into account to provide a comprehensive review. The results are published in reviews detailing the pros and cons of each model.

Well-known manufacturers or brands for solar panels

There are many reputable manufacturers and brands of solar panels. The most well-known include:

• SunPower
• LG Electronics
• Panasonic
• Canadian Solar
• Trina Solar
• JinkoSolar
• Hanwha Q Cells
• RECSolar
• yingli-solar
• Solarworld

You should consider this before buying a solar panel

Before you buy a solar panel, you should consider the following points:

Power: Check the performance of the solar panel. The higher the wattage, the more energy the panel can generate. Select the power according to your energy needs.

Efficiency: Pay attention to the efficiency of the solar panel. Higher efficiency values ​​mean that the panel can convert more sunlight into electricity. This is especially important if you have limited installation space.

Quality: Check the quality of the solar panel. High-quality panels are more durable and more resistant to environmental influences. Also check the manufacturer's warranty conditions.

Assembly: Note the mounting requirements of the solar panel. Check that it is suitable for the desired installation, e.g. B. for roof mounting or floor mounting.

Price: Compare the prices of different solar panels. However, pay attention not only to the price, but also to the quality and performance of the panel.

Why it is worth buying a solar panel

You can reduce your energy costs: Solar panels allow you to generate your own electricity, reducing your dependence on expensive grid energy.

You are environmentally friendly: Solar panels use the sun's energy, a clean and renewable energy source. By using solar power, you can reduce your ecological footprint and help reduce greenhouse gas emissions.

You are independent: With a solar panel you can become more independent from power supply companies. You are in control of your own energy production and are less vulnerable to power outages or rising electricity prices.

You can save money in the long term: Although the initial purchase price for solar panels can be higher, you can save money in the long run because you pay less for electricity consumption.

You make a contribution to the energy transition: By relying on solar power, you support the expansion of renewable energies and contribute to the global energy transition.

What you should know about the solar panel

There are some important things you should know about solar panel:

Functionality: Solar panels consist of photovoltaic cells that convert sunlight into electricity. This electricity can either be used immediately, stored in batteries or fed into the grid.

Installation: Solar panels are typically installed on the roof of a building to capture the most sunlight. Installation requires specific expertise and should ideally be carried out by a qualified installer.

Maintenance: Solar panels require little maintenance. However, they should be checked regularly for dirt such as dust or leaves and cleaned if necessary. Also regularly check the performance of the panels to ensure they are performing optimally.

Lifespan: The lifespan of solar panels can vary depending on the manufacturer and quality. As a rule, however, they have a lifespan of 25 to 30 years.

Subsidies and feed-in tariffs: Find out about possible subsidies and feed-in tariffs for the installation of solar panels. In some countries and regions, you can receive financial support or feed the excess solar power into the grid and be compensated for it.

Conclusion on solar panel

Solar panels are an effective and environmentally friendly way to generate electricity from sunlight. By installing solar panels, you can lower your energy bills, reduce your dependency on utility companies, and help reduce greenhouse gas emissions. However, be aware of individual requirements and learn about the best models and installation options for your needs. A solar panel purchase recommendation is based on your specific requirements and the evaluation of test winners and experiences of other users. It is advisable to compare different options and seek professional advice if necessary to make the best choice for your solar panel.