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Published on: September 27, 2021 / Updated on: September 27, 2021 – Author: Konrad Wolfenstein
A solar power system pays for itself faster the more solar power you consume directly. Electricity from your roof costs significantly less than electricity from the grid. The point at which a photovoltaic system becomes economically viable depends on several factors. For a single-family home with a 4 to 10 kWp system, the payback period is typically 8 to 12 years. Adding a battery storage system can extend this to approximately two more years. For businesses and industry, it's worthwhile simply because of the CO2 tax and the need for an independent power supply .
Add green energy to your life
Solar energy is only part of the solution. Adapting and expanding the infrastructure to renewable energies is a major challenge, but one that will ultimately pay off for us and future generations. In the future, innovations and ideas will no longer be developed in the conventional way, consciously or unconsciously, based on existing standards, but will always be geared towards energy efficiency and, for the most part, solar energy. This applies to everything from mechanical engineering to commerce. Moving away from everyday products, almost all of which were developed and produced using oil, the future will be exactly the opposite. It's not just about saving energy, but about the sustainable use of our environment and the inexhaustible energy provided by the sun.
With over 1,000 specialist articles, we cannot present all topics here. Therefore, you will find a small excerpt from our work here and we would be pleased if we have piqued your interest in getting to know us better:
Plan solar systems with photovoltaic solutions for freight forwarding and contract logistics
The EU Green Deal is the centerpiece of the new climate protection law and is driving developments and measures forward. In some German states, legal regulations already mandate the installation of photovoltaic systems in new logistics buildings. The requirement for solar panels in existing logistics buildings and centers will follow. Initial announcements regarding this have already been made by politicians, as the EU aims to be the world's first climate-neutral continent by 2050.
What will be crucial for the future will be how we continue to secure the infrastructure of our key industry! Key industries in Germany today include the automotive industry, construction industry, food, chemical industry, electrical industry, energy production, mechanical engineering and shipyards.
The COVID-19 pandemic, in particular, has demonstrated that the functioning supply chain management of trade and industry is largely due to the logistical expertise of freight forwarders and contract logistics providers. The fact that there were "only" shortages like the "toilet paper crisis" will remain a humorous footnote in the future.
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Photovoltaics is outperforming traditional power plants
The importance of photovoltaics for domestic electricity generation continues to grow unabated. A recent analysis by the Fraunhofer Institute revealed that solar and wind energy shared the top spot in net electricity generation in Germany for the first time in June. According to the analysis, photovoltaic systems in Germany contributed 7.04 terawatt-hours (TW) to electricity generation.
This put them just slightly behind wind turbines, which reached 7.09 TW. In comparison, gas-fired power plants (6.5 TW) and lignite-fired power plants (6.4 TW) performed significantly worse. The 18.3 percent share for photovoltaics thus clearly demonstrates why it is rightly considered by many to be the preferred technology for the energy transition.
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The solar gold of 68 terawatt hours in North Rhine-Westphalia
Nationwide, around one in ten terawatt hours of electricity from renewable energies comes from North Rhine-Westphalia, according to the State Agency for Nature, Environment and Consumer Protection (LANUV).
With over 288,000 renewable energy installations and a capacity of 23.3 terawatt-hours, renewable energy sources supplied over 16 percent of North Rhine-Westphalia's electricity consumption in 2019. This amount alone could completely power Bremen, Hamburg, and Mecklenburg-Western Pomerania.
The approximately eleven million rooftops in North Rhine-Westphalia have an estimated potential for 68 terawatt-hours of solar power. So far, only about 4 terawatt-hours have been realized, representing just three percent of the current electricity consumption in North Rhine-Westphalia.
Particularly high potential for solar power generation exists in densely populated regions such as Cologne, Düsseldorf, and the Ruhr area. Realizing this potential could result in savings of approximately 30 million tons of CO2. This corresponds to roughly ten percent of North Rhine-Westphalia's current greenhouse gas emissions.
The largest increase in installed capacity, approximately 470 megawatts, was recorded in the photovoltaic sector last year. This marks the fourth consecutive year that photovoltaic capacity has exceeded the previous year's increase.
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Solar carports as the key component in e-mobility?

Convert company parking spaces or shopping centers to solar carports - Image: Xpert.Digital / PATSUDA PARAMEE|Shutterstock.com
Now everything should happen very quickly: the turnaround in mobility. The way we move. For decades it was said that oil reserves were becoming scarce and would not last much longer. There was always talk of 40, 50 to 100 years. Nevertheless, not much happened here in terms of traffic policy, because there was apparently still plenty of fuel coming from the pump at the gas station. It is all the more astonishing that this argument is no longer brought up. Actually, it was always clear to us that our current form of transportation with combustion engines needed an alternative. That we can no longer continue like this in the long term, regardless of the environmental impact of our beloved gasoline and diesel vehicles. Electromobility is still in its infancy. She still has many flaws. But it also cannot rely on decades of development like with combustion engines, where improvements and optimizations have constantly gone hand in hand, from exhaust gases to consumption. Apart from Dieselgate, the diesel and emissions scandal.
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Solar parks – benefits for biodiversity
A study commissioned by the German Association of New Energy Industries (bne) concludes that solar parks have a positive effect on biodiversity.
The aim of the study was to show whether and to what extent solar parks can contribute to floristic and faunistic biodiversity.
For this purpose, documentation on the vegetation and fauna of 75 solar parks in Germany was evaluated. The studies and investigations available for the parks, which are spread across nine federal states, were mostly conducted during the permitting phases and are highly heterogeneous. Nevertheless, documentation from almost 40% of the solar parks eligible for evaluation could be used. For some parks, intensive studies also exist, in some cases comparing the federal states before and after the parks were built, allowing for meaningful conclusions to be drawn. These conclusions suggest that solar parks generally have a positive effect on biodiversity and identify structures that can contribute to increasing biodiversity, particularly with regard to the spacing between the module rows and maintaining these spacings.
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EU: Waste incineration is renewable energy
A group of NGOs and companies from the recycling, forestry and chemical industries are calling for the burning of non-recyclable waste to generate energy to no longer be considered renewable energy.
Non-renewable energy can only be used once. It is limited and not available at will. This also includes nuclear power. Nuclear power plants require enriched uranium, which must first be produced industrially. Depleted uranium is produced as a waste product. What happens to this and to the fission products caused by nuclear fission, i.e. highly toxic radioactive waste, is a different topic. On the other hand, fossil fuels cause environmental pollution and global warming by releasing greenhouse gases.
Until then, everything is logically understandable: renewable energy is freely available and does not harm the environment.
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2019: In Germany, 47% of the electricity mix is renewable.
According to the Fraunhofer Institute for Solar Energy Systems, 47 percent of the electricity generated in Germany this year comes from renewable sources. Up to and including mid-July, wind and solar power plants in Germany produced almost 100 terawatt-hours (TWh) of electricity. By comparison, lignite and hard coal produced 84 TWh. According to a report in the Handelsblatt newspaper, the share of coal-fired power plants in German electricity generation fell surprisingly sharply in the first half of the year. "Wind, solar, and even gas-fired power plants have largely displaced hard coal power plants from the market, but increasingly also lignite-fired power plants."
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- Warehouses, production halls and industrial halls with their own power source from a photovoltaic roof system - Image: NavinTar|Shutterstock.com
- Industrial plant with its own power source from an outdoor photovoltaic system - Image: Peteri|Shutterstock.com
- Plan solar systems with photovoltaic solutions for freight forwarding and contract logistics
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- Plan photovoltaics for warehouses, commercial halls and industrial halls
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- Plan solar systems with photovoltaic solutions for freight forwarding and contract logistics
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Xpert.Solar offers consulting and planning services for solar solutions, solar systems, solar fences, balcony solar systems or ground-mounted solar installations in Ulm, Neu-Ulm, Stuttgart and Augsburg.
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Xpert.Digital – Konrad Wolfenstein
Xpert.Digital is a hub for industry with a focus on digitalization, mechanical engineering, logistics/intralogistics and photovoltaics.
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