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As a leading provider in the field of renewable energy, we offer a wide selection of high-quality components for your custom photovoltaic system. Our extensive range includes solar panels, mounting systems, inverters, storage solutions, and much more. Whether you’re planning a small solar system for your home or a large-scale commercial installation, you’ll find the right individual components with us to bring your project to life successfully.

FAQ

Frequently Asked Questions

Which individual components do I need for a photovoltaic system?

For a photovoltaic system, you need several individual components to convert solar energy into electricity and make it usable. The most important components are

Solar modules:
These consist of photovoltaic cells and convert sunlight into electrical energy (direct current).
Mounting system:
The mounting system is used to attach the solar modules to the roof or substructure. It should be secure and stable in order to protect the solar modules from the weather.
Inverter:
The inverter is a central element of the system and converts the direct current generated by the solar modules into the alternating current required for household use.
Cables and wiring:
Cables are used to connect the solar modules to the inverter and the power grid.
Battery storage (optional):
A battery storage system can store the excess solar power that is not used directly in the household. This means that the electricity can be used at a later time, for example at night or in bad weather.
DC circuit breakers and fuses:
These components are used to protect the system from overloads and short circuits.
AC circuit breakers and residual current circuit breakers:
These components protect the inverter and the power grid from possible faults.
Smart Meter (optional):
A special meter can measure the electricity produced and self-consumption. This is important if you want to receive a feed-in tariff for the surplus electricity.
Monitoring system:
A monitoring system allows you to monitor the performance of your photovoltaic system and detect possible faults at an early stage.

As a qualified and certified specialist company, we can help you select and procure high-quality individual components for your photovoltaic system. Tailor-made advice enables you to obtain an efficient and reliable solar system that meets your individual needs and requirements.

What role do solar modules play in a photovoltaic system?

The solar modules play a central role in a photovoltaic system. They are the heart of the system and have the main task of converting sunlight into electrical energy. This conversion takes place through the so-called photovoltaic effect, in which the sunlight releases photons on the surfaces of the solar cells in the modules, which in turn set electrons in motion and thus generate a direct current. The solar modules consist of many small solar cells that are connected in series or parallel to achieve the desired output. The output of a solar module is given in watts (W) and depends on the size and efficiency of the solar cells it contains. Depending on how many solar modules are installed in a photovoltaic system, the total power generated can vary greatly. In larger systems, several modules are often combined in one solar generator in order to achieve a higher output. The solar modules are usually mounted on the roof or in another suitable location to capture the most sunlight. A good location and the right angle of inclination are important to maximize the efficiency of the solar modules and ensure optimal power generation. In a photovoltaic system for self-consumption, the direct current generated by the solar modules is converted into the alternating current required for household use via the inverter. Surplus electricity can either be stored in a battery storage system or fed into the public grid. The quality and performance of the solar modules have a direct influence on the overall performance and efficiency of your photovoltaic system. As a qualified and certified specialist company, we will be happy to advise you on the selection of high-quality solar modules that meet your requirements and needs and ensure efficient power generation.

What types of solar modules are there?

There are various types of solar modules that differ in their technology and application. The most important types of solar modules are

Crystalline silicon solar modules (monocrystalline and polycrystalline):
These are the most commonly used solar modules and consist of monocrystalline or polycrystalline silicon cells. Monocrystalline modules have a higher efficiency and a darker color, while polycrystalline modules are usually cheaper and have a slightly bluish color.
Thin-film solar modules:
These modules use thin layers of amorphous silicon, copper indium gallium selenide (CIGS) or cadmium telluride (CdTe). They are more flexible and lighter than crystalline modules, but are generally less efficient.
Bifacial solar modules:
These modules can capture sunlight from both sides, using both direct sunlight and reflected light from the back. This allows them to achieve a higher output in some situations.
PERC solar modules:
PERC stands for “Passivated Emitter Rear Cell” and refers to a technology in which the rear side of the solar cells is passivated to increase efficiency.

Each type of solar panel has its own advantages and disadvantages, and choosing the right type of panel depends on your specific needs, available space and budget.

What should be considered when selecting solar modules?

When selecting solar modules for your photovoltaic system, there are some important factors to consider in order to achieve the best possible performance and efficiency. Here are the most important aspects:

Efficiency:
The efficiency of the solar modules indicates how much sunlight is converted into electrical energy. Highly efficient modules generate more electricity per surface area and are particularly advantageous when available space is limited.
Output:
The output of a solar module is given in watts (W) and determines the amount of electricity generated. The total output of the system depends on the number and output of the solar modules used.
Module type:
There are various module types, such as monocrystalline, polycrystalline, thin-film or bifacial modules. Each type has specific advantages and disadvantages that should match the individual needs and site requirements.
Space requirements:
Consider the space available on your roof or site. Depending on the area, different module types or sizes may be more suitable.
Longevity and warranty:
Pay attention to the longevity and warranty conditions of the solar modules. High-quality modules often have a longer lifespan and are offered with longer warranty periods.
Certifications:
Check that the solar modules meet the necessary certifications and standards. This ensures the quality and safety of the modules.
Price-performance ratio:
Consider the price-performance ratio of the solar modules. A good balance between quality and cost is important in order to make a long-term profitable investment.

As a qualified and certified specialist company, we will be happy to assist you in selecting the right solar modules for your system. We take your individual requirements and site conditions into account in order to offer you high-quality components that guarantee optimum performance and long-term reliable power generation.

Which mounting systems are suitable for photovoltaic systems?

There are various mounting systems for photovoltaic systems that are suitable depending on the location and roof type. Here are the most common mounting systems:

On-roof mounting system:
With this type of mounting, the solar modules are mounted directly on the roof surface. There are different variants, such as pitched or flat roof mounting. The on-roof mounting system is well suited for new buildings or roofs with sufficient space and stability.
In-roof mounting system:
Here, the solar modules are integrated directly into the roof cladding, which also serves as a roof covering. In-roof mounting systems offer an aesthetic solution, as the modules are flush with the roof surface. They are ideal for new buildings or major roof renovations.
Flat roof mounting system:
These systems allow the solar modules on flat roofs to be inclined in order to optimize solar radiation. Flat roof mounting systems can be installed at different angles to ensure the best possible orientation.
Façade mounting system:
In some cases, solar modules can also be mounted on the façades of buildings in order to utilize additional space for power generation. This offers an innovative way to generate solar power without taking up additional space on the roof.
Ground mounting system:
These systems are used to install solar modules in open areas such as meadows or agricultural land. Ground-mounted systems are ideal for larger solar installations and solar parks.

When selecting a suitable mounting system for your photovoltaic system, factors such as roof type, statics, alignment, angle of inclination and wind loads must be taken into account.

How does an inverter work in a photovoltaic system?

An inverter is a crucial component in a photovoltaic system. Its main function is to convert the direct current (DC) generated by the solar modules into grid-compliant alternating current (AC) so that it can be fed directly into the electricity grid or used in your own household. The inverter plays a central role in the efficiency and control of the photovoltaic system. The conversion process in the inverter takes place in several steps:

Rectification:
The solar cells in the solar modules generate direct current, which is first directed to the optimum current path by so-called bypass diodes in the modules themselves.
Maximum power point tracking (MPPT):
The inverter has several so-called MPPT trackers that scan the maximum power of the solar modules. The inverter then continuously adjusts the operating voltage and operating current to achieve the highest possible energy yield.
Direction of alternation:
Once the optimum point has been found, the inverter converts the direct current into alternating current. In doing so, it adjusts the frequency and voltage of the alternating current to the usual values in the power grid.
Grid synchronization:
The generated alternating current is fed into the power grid and synchronized with the existing grid voltage. This means that the self-generated electricity is used directly in the household or in the grid.
Monitoring and communication:
Modern inverters have intelligent monitoring systems and communication technologies. They can monitor and record the operating status of the photovoltaic system and transmit important data to the system operator or the grid operator.

A high-quality and efficient inverter is crucial for the performance and cost-effectiveness of your photovoltaic system.

What types of inverters are there?

There are different types of inverters that are used depending on the area of application and technical requirements. The most common types are

String inverters:
String inverters are the most common type of inverter in photovoltaic systems. They are generally used for systems with a series of solar modules (so-called strings) that are connected in series. The inverter converts the direct current of all modules in a string into alternating current.
Central inverters:
Central inverters are mainly used in larger photovoltaic systems, such as solar parks. They can connect several strings of solar modules in parallel and convert them into alternating current. By centralizing the inverters, the system output is optimized and efficiency is increased.
Micro inverters:
Micro inverters are installed on each individual solar module and convert the direct current of each module directly into alternating current. This technology offers the advantage that each module works independently, which can improve the overall yield of the photovoltaic system.
Hybrid inverters:
Hybrid inverters are versatile devices that not only convert the direct current from the solar modules into alternating current, but also offer the option of charging and discharging battery storage and interacting with other energy sources such as a generator or the power grid.

Each type of inverter has its advantages and disadvantages and is suitable for certain applications.

What is the importance of storage system in a photovoltaic system?

The storage system, also known as battery storage, plays an important role in a photovoltaic system, as it temporarily stores surplus electricity generated by the solar modules and keeps it available for later use. Without storage, the surplus electricity would be fed into the power grid and possibly not used optimally. The most important functions of the storage system in a photovoltaic system are

Self-consumption optimization:
with a storage system, excess solar power can be stored during the day for use in the evening and night hours when solar radiation is insufficient. This can increase self-consumption and reduce the amount of electricity purchased from the public grid.
Energy self-sufficiency:
By using a storage system, a higher degree of energy self-sufficiency can be achieved. This means that most of the solar power generated is used directly in your own household without having to purchase additional electricity from the grid.
Grid independence:
In combination with an appropriately dimensioned photovoltaic system, a battery storage system enables a certain degree of independence from the public grid. In certain situations, such as power outages or in remote areas without a stable power supply, the system can operate autonomously.
Grid serviceability:
Storage systems can also contribute to grid serviceability by storing surplus energy and feeding it into the grid when required. This can relieve the power grid and contribute to stabilization.
Flexibility in energy use:
With a storage system, the electricity generated can be used in the household or business as required. This is particularly advantageous if the electricity tariffs are time-dependent or peak loads are to be avoided.

The choice of a suitable battery storage system depends on various factors such as the desired degree of independence, the storage requirements and the available budget.

Which battery systems are available for storage solutions?

Various battery systems are available for storage solutions in photovoltaic systems. The most common types are

Lead-acid batteries:
Lead-acid batteries are a proven and cost-effective technology. They are well suited for smaller storage solutions and are often used in older systems. However, they have a limited lifespan and require regular maintenance.
Lithium-ion batteries:
Lithium-ion batteries are the most widely used technology for storage solutions. They are characterized by high energy density, low weight and a long service life. They are also maintenance-free and offer good performance with high efficiency.
Redox flow batteries:
Redox flow batteries are more suitable for larger storage solutions. They are characterized by high flexibility and a long service life. A major advantage is the ability to scale the storage capacity independently of the power.
Sodium-ion batteries:
Sodium-ion batteries are a promising alternative to lithium-ion batteries. They offer similar performance and lifespan, but may be more environmentally friendly as they do not use expensive lithium.
Battery storage systems for home power plants:
In addition to the battery types mentioned above, there are also complete systems that combine battery, inverter and energy management in one device. Such home power plants offer simple integration and are often very user-friendly.

The choice of battery system depends on various factors, including the required storage capacity, the desired degree of self-sufficiency, service life, environmental compatibility and budget.

Which cabling is used in a photovoltaic system?

Various types of cabling are used in a photovoltaic system to ensure the safe and efficient flow of electricity between the individual components. The most important types of cabling are

DC cabling:
DC cabling is responsible for connecting the solar modules to each other and to the inverter. Special solar cables are used here that are UV-resistant and suitable for outdoor use. The cabling is usually carried out in so-called strings, whereby several solar modules are connected in series.
AC cabling:
AC cabling transports the converted electricity from the inverter to the power distribution system in the building or to the public power grid. Conventional installation cables that comply with local electrical installation standards are used for the AC cabling.
Cabling to the battery storage system:
If the photovoltaic system is equipped with a battery storage system, additional cabling is required for the current flow between the inverter and the battery storage system. These cables must be suitable for direct current and, depending on the system type, must also be designed for bidirectional current transmission.
Connecting cables and connectors:
Special connectors and connecting cables are used to connect the various components to each other. These ensure a reliable and safe electrical connection.
Monitoring cables:
Monitoring cables are used to monitor and control the photovoltaic system and transmit data between the individual components, such as the inverter, battery storage system and energy management system.

When installing a photovoltaic system, it is important to use high-quality cabling that meets local requirements in order to ensure that the system functions safely and efficiently in the long term.

Can I install the photovoltaic system myself or should I hire a professional?

It is possible to install a photovoltaic system yourself, but it is advisable to hire a qualified professional or specialist company. Installing a photovoltaic system requires specialist knowledge, experience and compliance with certain standards and regulations in order to ensure that the system functions safely and efficiently. Important reasons for hiring a professional are

Safety:
Installing solar panels and electrical components can be dangerous, especially if you don’t have the necessary expertise and equipment. A professional installer knows the safety precautions and will ensure a safe installation.
Optimal design:
A specialist company can optimally design the photovoltaic system according to the local conditions, energy requirements and individual needs. This maximizes the efficiency and performance of the system.
Approvals and regulations:
The installation of a photovoltaic system is subject to certain legal regulations and official approvals. A specialist company is familiar with the necessary regulations and ensures that all legal requirements are met.
Guarantee and warranty:
Many manufacturers only grant a guarantee and warranty on their products if the installation has been carried out by a certified specialist company.
Feed-in tariff:
For systems that feed electricity into the public grid, certain technical requirements must be met in order to receive a feed-in tariff. A specialist company is familiar with these requirements and ensures that the system meets the specifications.
Expert advice:
A qualified specialist company can provide you with comprehensive advice, answer your questions and help you find the best solution for your individual needs.

We therefore recommend leaving the installation of your photovoltaic system to a certified specialist company to ensure a smooth and professional implementation. As a professional installation company for photovoltaic systems, we will be happy to assist you with the planning, installation and commissioning of your system.

What are the advantages of buying individual components as opposed to complete packages?

The purchase of individual components for a photovoltaic system offers several advantages over the purchase of complete packages:

Flexibility:
purchasing individual components allows greater flexibility in the design of the photovoltaic system. You can select the components specifically and adapt them to your individual circumstances, energy requirements and financial possibilities.
Higher quality:
Individual components often offer higher quality than prefabricated complete packages. You can select branded products and proven technologies to ensure a long-lasting, high-performance system.
Customized solutions:
Buying individual components makes it possible to tailor the photovoltaic system and take specific requirements into account. This allows you to achieve an optimal system design and maximize energy efficiency.
Price comparison:
When purchasing individual components, you have the opportunity to compare prices and benefit from favorable offers. You can search specifically for discounts and special offers for certain components and thus potentially save costs.
Compatibility:
By specifically purchasing individual components, you ensure that all components are compatible with each other and work together smoothly.
Expandability:
If you want to expand your photovoltaic system in the future, buying individual components is advantageous. You can easily add more modules or a larger inverter to increase the size of the system and meet the growing energy demand.

However, buying individual components requires careful planning and knowledge of the various components and how they interact. It is advisable to seek advice from a qualified specialist company in order to obtain an optimally coordinated and efficient photovoltaic system.

What guarantees apply to the individual components?

The guarantees for the individual components of a photovoltaic system can vary depending on the manufacturer and product. In general, however, the following guarantees apply:

Solar modules:
The warranty for solar modules is usually 10 to 25 years. It usually includes a performance guarantee, which ensures that the modules deliver a certain minimum output during the guarantee period. The warranty typically also covers defects in materials and workmanship.
Inverters:
The warranty for inverters is usually 5 to 10 years. It can also be extended up to 20 years, depending on the manufacturer and model. The warranty usually covers defects in materials and workmanship.
Battery storage:
The warranty for battery storage can vary depending on the type of battery and manufacturer. It is often between 5 and 10 years. The warranty typically covers a minimum capacity and material defects.
Mounting systems and cabling:
Mounting systems and cabling are usually covered by warranties of 5 to 10 years, covering defects in materials and workmanship.

It is important to check the exact warranty terms and duration for each component at the time of purchase as they can vary from manufacturer to manufacturer. High quality and reputable manufacturers generally offer longer warranties and better coverage. In addition to the manufacturer’s warranty, it may also make sense to obtain a so-called “functional warranty” or “system warranty” from the installation company when installing the photovoltaic system. This guarantee ensures that the system will achieve certain performance values and function properly. Such guarantees can offer additional protection and increase confidence in the overall performance of the system.

How big should my photovoltaic system be?

The size of your photovoltaic system depends on several factors, including

Energy requirements:
calculate your average daily electricity consumption to get an idea of how much electricity the system should generate to meet your needs.
Available space:
Consider how much space is available on your roof or property to install the solar panels.
Roof orientation and pitch:
The orientation and pitch of the roof will affect the efficiency of the solar system. An optimal orientation is south-facing with an inclination of around 30 to 45 degrees.
Location:
The geographical location plays a role as it influences the solar radiation. In sunny regions, smaller systems may be sufficient, while in less sunny areas a larger system is required.
Financial possibilities:
Consider your budget and how much you want to spend on the photovoltaic system investment.

Usually, the size of the photovoltaic system is given in kilowatt peak (kWp), which indicates the maximum power the system can generate under ideal conditions. A typical photovoltaic system for a single-family home has an output of around 4 to 20 kWp.

Can I expand my photovoltaic system?

Yes, you can usually extend your photovoltaic system to increase the output and energy yield. An extension can be useful if your electricity requirements increase or if you have not yet used the full roof area for the original system. There are two ways to expand a photovoltaic system:

Adding additional modules:
You can install more solar modules on your roof to increase the overall output of your system. Here it is important to ensure that the inverter is sufficiently dimensioned to handle the additional power.
Parallel-connected systems:
In some cases, it may make sense to install a separate photovoltaic system next to the existing system and operate both systems in parallel. This can be a good option if there is not enough space available to expand the existing system.

Before you consider expanding your photovoltaic system, you should carry out thorough planning and seek advice from a qualified specialist company. An expert can check the structural requirements, analyze the existing system and recommend the best solution for your individual situation. You can also check whether state subsidies or incentives are available for the expansion of your photovoltaic system to reduce costs and improve the profitability of the project.

Are subsidies available for the purchase of photovoltaic systems?

Yes, subsidies for photovoltaic (PV) systems are often available, depending on the location and type of program. In the U.S., there are federal, state, and local incentives that can help reduce the cost of installing a solar system. Here are some examples:

Federal Incentives

Federal Investment Tax Credit (ITC): Homeowners and businesses can claim 30% of the cost of installing a solar system on their federal taxes. This applies to systems installed through 2032, after which the percentage begins to decrease.

State and Local Incentives

Rebates: Some states, utilities, or municipalities offer rebates for purchasing or installing PV systems.
Tax Credits and Exemptions: States like Florida provide property tax exemptions for solar installations and sales tax exemptions on solar equipment.
Net Metering: This allows you to sell excess energy your system generates back to the grid for credits, reducing your utility bill.

Programs and Grants

Renewable Energy Certificates (RECs): In some states, you can earn RECs for generating solar power, which can be sold to utilities.
USDA Rural Energy for America Program (REAP): Provides grants and loans for renewable energy projects in rural areas.

What is the service life of a photovoltaic system?

The service life of a photovoltaic system is usually between 25 and 30 years. Modern solar modules are designed to function reliably and generate electricity from sunlight for many decades. During this time, the solar modules can still retain a considerable proportion of their original output, usually around 80% to 90%. The actual lifespan of a photovoltaic system depends on various factors, including

Quality of components:
High quality solar panels and other components tend to last longer and perform better than cheaper alternatives.
Maintenance and care: Regular maintenance and care can extend the life of the system and maintain its efficiency.
Environmental conditions:
The environment in which the system is installed will affect its durability. Extreme weather conditions, such as strong storms or high humidity, can affect the system.
Installation: Professional installation by a qualified installer ensures optimal performance and longevity of the photovoltaic system.
Technological development:
The technology of solar modules and inverters is constantly improving, which can lead to a longer service life and higher efficiency.

It is important that you monitor your photovoltaic system regularly and have maintenance work carried out if necessary in order to optimize the service life and performance of the system. A regular inspection by a qualified specialist company can help to identify and rectify potential problems at an early stage to ensure the long-term functionality of your photovoltaic system.

Are photovoltaic systems environmentally friendly?

Yes, photovoltaic systems are considered an environmentally friendly energy generation technology. They produce electricity from sunlight, a renewable energy source, without causing harmful emissions. Compared to traditional fossil fuels such as coal, oil or gas, photovoltaic systems contribute significantly to reducing CO2 emissions and combating climate change. Here are some reasons why photovoltaic systems are considered environmentally friendly:

Renewable energy:
Solar energy is an inexhaustible source of energy, as the sun is a permanent and free source of energy.
Reduction of greenhouse gases:
Generating electricity from photovoltaic systems does not cause direct greenhouse gas emissions such as carbon dioxide (CO2), nitrogen oxides (NOx) or sulphur dioxide (SO2), which are responsible for climate change and air pollution.
Conservation of natural resources:
The use of photovoltaic systems helps to reduce dependence on limited fossil fuels, which have a negative impact on the environment when extracted and burned.
Low environmental impact:
The construction and installation of solar panels cause a low environmental impact compared to conventional energy generation technologies.
Decentralized energy generation:
Photovoltaic systems enable decentralized energy generation by producing electricity where it is needed. This avoids long transmission lines and minimizes energy losses.
Promoting the energy transition:
Photovoltaic systems play an important role in the transition to a sustainable and renewable energy supply, promoting a green and low-carbon future.

However, it is important to note that energy and resources are also consumed in the production of solar panels and other components. Nevertheless, the environmental benefits of photovoltaic systems far outweigh the negative impacts, making them an important pillar of environmentally friendly energy production.

Can I feed surplus electricity into the grid?

Yes, you can feed surplus electricity from your photovoltaic system into the electricity grid. This concept is known as “grid feed-in” or “solar power feed-in”. If your photovoltaic system generates more electricity than your household currently needs, the surplus electricity can be fed into the public electricity grid. The feed-in is usually carried out via a special feed-in meter that records the amount of electricity you feed into the grid. Depending on the legal framework in your region, you may receive a payment for the electricity you feed into the grid, which is known as a “feed-in tariff”. The amount of this remuneration can vary and is often determined by legal regulations or feed-in contracts with your energy supplier. The option of feeding electricity into the grid offers an additional economic component for your photovoltaic system, as you can not only cover your own electricity consumption, but also sell some of the electricity you generate. This allows you to amortize your investment in the solar system more quickly and possibly even make a profit. However, it is important to note that not all countries or regions allow feed-in tariffs or unrestricted grid feed-in. Sometimes there are limits to the amount of electricity that can be fed into the grid or there are technical requirements for the feed-in. As a qualified specialist company, we can inform you about the applicable laws, regulations and requirements in your region and help you to operate your photovoltaic system efficiently and in compliance with the law.

What is the return on investment of a photovoltaic system?

The return on a photovoltaic system depends on various factors and can therefore vary. The most important influencing factors include

Investment costs:
The total cost of purchasing and installing the photovoltaic system, including solar modules, inverters, mounting systems and battery storage, plays a decisive role in calculating the return on investment.
Feed-in tariff or electricity cost savings:
If you feed surplus electricity into the grid and receive a feed-in tariff for it, this can increase your return. Alternatively, you can consume the generated electricity yourself and thus reduce your electricity costs.
Electricity consumption and generation:
The amount of electricity generated by your photovoltaic system and your actual electricity consumption will affect your return. A larger system that generates more electricity can potentially achieve higher savings.
Energy prices:
Current energy prices for electricity from the grid also have an impact on returns. Rising electricity prices can make the return on a photovoltaic system more attractive.
Hours of sunshine and location:
The location of your photovoltaic system and the number of hours of sunshine influence the efficiency of the system and therefore also the yield.
Financing and subsidies:
The type of financing and possible government subsidies or tax incentives can influence profitability.

In general, photovoltaic systems can offer an attractive return in the long term, especially if the solar energy is used for self-sufficiency and a feed-in tariff is granted. The average return on photovoltaic systems is often in the range of 5% to 10% per year.

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Solar Batteries (26)

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Mounting Systems (83)

Inverters (93)

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