Self-consumption PV system
Table of contents
Explanation of terms: Photovoltaic self-consumption
Are you considering purchasing a self-consumption PV system? In general, when looking at photovoltaics and photovoltaic systems, it is important to consider the various options, from self-sufficiency to self-consumption and feed-in. These differ in particular depending on what your personal goal is with your photovoltaic system.
- Feed-in PV system
The electricity produced is fed into the public grid. In most cases, you not only receive the state-guaranteed minimum remuneration under the Renewable Energy Sources Act (EEG ), but can also benefit from high electricity prices through direct marketing.
- Self-consumption PV system
The electricity generated by your own PV system is not fed into the public grid, but is used to power your own business. This makes you a little less dependent on the public power supply.
- Self-sufficient PV system
The installed PV system should achieve the greatest possible independence from the energy supplier. The so-called degree of self-sufficiency is used to indicate this value. Example: If your degree of self-sufficiency is 83%, you only need to draw 17% of your electricity from the public grid.
Which roofs for large self-consumption PV systems?
Solar Direktinvest GmbH specializes in PV systems for large roof areas. We offer the construction of photovoltaic systems for self-consumption on roof areas from 800m². It does not matter which business is located under this roof area: Stables, barns and warehouses are just as suitable as office buildings or vehicle halls.
The most important factor for self-consumption is that the building houses a business that can and wants to use the electricity generated.
Please send us an inquiry and we will check together with you whether a self-consumption PV system is suitable for you and your business!
Components of the PV system Self-consumption
Three different components are essential for a self-consumption PV system. As these components also have a significant influence on the yield of the PV system, you should pay particular attention to the quality of the components. This is often reflected not only in the longevity, but above all in the performance.
These three main components can be supplemented by various other components, some of which can increase the self-consumption of the PV system. We would be happy to advise you on whether and which additions would make sense for you personally. We look forward to your questions!
- PV modules: Monocrystalline modules are particularly suitable here. We mainly install modules from the market-leading companies LONGi and Canadian Solar, which impress with their performance.
- Inverter: The direct voltage generated by the sun must be converted into the alternating voltage required for the power supply. The Chinese manufacturer Huawei is the market leader here, which is why we mainly use inverters from Huawei.
- Solar charge controller: This type of charge controller ensures that the battery is charged with the correct current. Charging voltages that are too high or even too low are intercepted by the solar charge controller.
- Battery storage: Storage systems help to ensure that the electricity produced is still available for self-consumption when the sun is not shining. However, these storage systems are very expensive and therefore hardly economical for larger roofs.
- Energy management system: The system is used to optimize electricity consumption within the building supplied by the self-consumption PV system. This is only worthwhile if technical devices are available that can be used flexibly over time.
- Heat pump: With heat pumps, surplus electricity that is not used for photovoltaic self-consumption can be fed into the hot water and/or heating system.
How does photovoltaic self-consumption work?
How a self-consumption PV system generally worksis quickly explained, because self-consumption of a solar system takes place in 3 simple steps:
- Your photovoltaic system produces solar power - even if the sun is not shining directly, electricity yields can still be achieved.
- The electricity produced, which is made usable by the inverter, is fed into the building 's electricity grid and used. In the case of large roof areas, the entire business can be supplied with solar power.
- If there is too little/too much solar power:
- If not enough electricity is produced to cover the company's own requirements, electricity is purchased from the public grid.
- If a lot of electricity is produced, for example during midday in spring or summer, and this is not fully consumed by the company, excess electricity is fed into the grid.
Advantages of a self-consumption PV system
- Independence through solar system self-consumption
Businesses in particular are struggling with rising electricity prices, as the magnitude of their electricity consumption is completely different to that of a single-family home. The more solar power you generate yourself, the less dependent you are on energy suppliers and rising electricity prices.
- The electricity from a self-consumption PV system is sustainable
Photovoltaic systems are CO2-neutral after just a few years. If you use this green electricity in your company, it is not only good for the environment: it also has a lasting impact on your company's image.
- Cost savings through photovoltaic system self-consumption
Electricity prices have risen by well over 30 cents per kWh in some cases over the past year. If you decide to consume your own electricity, you will save the costs of purchasing electricity from the public grid. Self-consumption of electricity is much more profitable.
Disadvantages of a self-consumption PV system
There are hardly any disadvantages to self-consumption with a PV system. One of these few disadvantages is that the state-guaranteed feed-in tariff, which is set out in the EEG, has continued to fall in recent years. If overproduced electricity is fed into the public grid, you will receive a small payment. However, if you need electricity from the public grid on days when there is no sun, you will have to buy it at a higher price than the electricity you fed in when there was overproduction.
However, something will change here from 2023: the feed-in tariffs will be increased again, and the degression of the feed-in tariffs will even be suspended until the beginning of 2024. The perfect time to install your own PV system on your roof!
PV system self-consumption - Is it worth it?
Would you like to find out whether a photovoltaic system for self-consumption is really worthwhile for you? Then you need to consider the so-called electricity production costs. These include all costs incurred for the production of electricity from renewable energies. This includes acquisition costs, installation costs and operating costs. With Solar Direktinvest, the first two costs are combined, while the operating costs are mainly covered by our all-round carefree package.
Add these costs together. The greater the difference between these electricity production costs and the current electricity price, the more worthwhile it is to consume the PV electricity yourself.
Self-consumption PV systems - Conclusion
A self-consumption PV system has many advantages that you can use for yourself and your business. After installing your own PV system, your business will be less dependent on the current electricity price trend. Another advantage: your PV system will have paid for itself in full after just a few years, so that you can then use the electricity generated by the sun completely free of charge.
With Solar Direktinvest, you have a strong partner at your side.
If your roof is in need of renovation, we will carry out a professional roof renovation for a small additional charge, which will ensure that your PV system runs flawlessly for the next 40 years.
In addition, we not only have years of experience in the construction of large-scale photovoltaic systems, but we also do not leave you alone after the possible renovation and construction of your PV system. With our all-round carefree package, which includes monitoring and maintenance of the PV system as well as various important insurances, we ensure that you always have an optimally running photovoltaic system that generates as much electricity as possible, even after construction.
Contact us if you are interested in a self-consumption photovoltaic system
Photovoltaic system for own consumption: Are you interested in having a PV system installed on the roof of your company? Then get in touch with us! We will check whether a self-consumption PV system is suitable for your roof!
Please feel free to write to us using the contact form below. We look forward to hearing from you!
