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John WhiteArticle published at:
May 14, 2026
The energy transition has long since ceased to begin only on large roofs or in solar parks – balcony solar systems are also playing an increasingly important role. More and more households are relying on so-called "balcony power plants" to meet their own electricity needs and save costs. But what happens when your balcony power plant produces more electricity than you currently need? The keyword is "grid feedback". In this article, you will learn how grid feedback works, what rules apply in Germany, and why energy storage is becoming increasingly important.
What does grid feedback mean for a balcony power plant?
Grid feedback describes the process by which excess solar power, which is not directly consumed in the household, is fed into the public electricity grid. With balcony power plants – also known as plug-in photovoltaic systems – this happens automatically as soon as the generated electricity exceeds the current load in the household.
This happens, for example, when you are out at midday with full sunlight and your appliances hardly need any electricity. Your inverter then feeds the unused electricity proportionally back into the public grid.
However, while owners of large PV systems can receive remuneration for fed-in electricity according to the Renewable Energy Sources Act (EEG), this usually does not apply to mini solar systems with a maximum feed-in capacity of 800 watts. Here, optimizing self-consumption is the priority.
Legal bases and reporting obligations
Anyone operating a balcony photovoltaic system must generally register it with the grid operator and in the market master data register of the Federal Network Agency. This also applies if the grid feedback is negligible. This ensures that all energy flows are transparently recorded and safely operated.
In Germany, balcony power plants are currently allowed to have an inverter output of up to 800 watts, which was made possible by the adjustment of VDE standards and the Mini-PV ordinance. It is important that the micro-inverter used – for example, models from Hoymiles, Envertech, or Deye – has grid approval.
For a legal connection, a bidirectional meter is also mandatory, which correctly records both electricity consumption and grid feedback. Old Ferraris meters with a backstop cannot be used as they do not measure the energy flow correctly.
Why energy storage makes sense for balcony power plants
A common criticism of balcony power plants is that they often generate the most electricity when no one is home. This is where energy storage comes into play, allowing the electricity generated during the day to be used in the evening or at night.
Modern balcony batteries, such as the "Zendure Solarflow" or "EcoFlow PowerStream", store surplus energy and release it when needed. This way, you avoid grid feedback, use more of your own solar power, and significantly increase your household's self-sufficiency.
Market trends: Increasing demand for storage solutions
According to Statista and Energy-Charts, the number of mini PV systems sold in Germany is increasing by more than 40 percent annually. In parallel, interest in battery storage is growing, especially among city dwellers without large roof areas.
In addition, surveys show that around 70 percent of balcony power plant users plan a storage expansion in the long term to increase the self-consumption rate to over 85 percent. This significantly reduces electricity costs while further minimizing environmental impact.
The company presentation follows the second paragraph of this section:
At DRBO Greenenergy, we pursue a clear goal: to advance the decentralized energy transition together with our customers. We already supply numerous hardware stores, specialist dealers, and installation companies with high-quality solar and energy storage solutions. With our expertise, we now also want to support private customers in making clean energy simple and accessible. Our product range includes balcony power plants, storage solutions, micro-inverters, and accessories suitable for both rental apartments and owner-occupied homes.
Top products in balcony power plants with grid feedback and storage options
As part of product consulting, DRBO Greenenergy emphasizes the importance of modular systems: Flexible storage sizes and expandable inverter solutions enable customers to make their systems future-proof.
Technical aspects of grid feedback
From a technical perspective, the micro-inverter controls the interaction between generation and consumption. As soon as the connected devices require less electricity, the inverter detects the surplus and feeds it into the grid in a controlled manner.
Grid feedback occurs synchronously with the grid frequency (50 Hz), ensuring stability and safety. Systems such as the Deye SUN600 or Hoymiles HMS-800W have automatic shutdown functions if grid parameters deviate.
Some devices even offer bidirectional communication functions – allowing you to determine how much electricity should be fed in or stored via an app or energy management system.
Profitability and ROI
In a typical four-person household, an 800-watt balcony power plant can generate up to 700 kWh of electricity annually. Without storage, an average of 60 percent of this is directly used; with storage solutions, the self-consumption rate increases to up to 90 percent.
The investment usually pays for itself after five to seven years. Storage limitations, funding programs, and rising electricity prices significantly influence the return on investment. For example, a system with a 1 kWh storage unit amortizes within just under six years.
Practical application examples
A tenant in Hanover, for instance, uses a balcony power plant with 2 × 410-watt modules and a Deye inverter. By integrating a 1 kWh battery module, his self-consumption was increased from 55 to 88 percent.
Another user reports that with the "EcoFlow PowerStream" system, he saves around 250 euros in electricity costs annually and specifically uses the stored electricity for his home office and evening lighting.
Buying guide: What to look for
Before purchasing a balcony power plant with grid feedback, the following are crucial:
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VDE approval and safety certificates for the inverter
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Compatibility with storage options
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UV and weather-resistant module mounts
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Backstop on the electricity meter or installation of a bidirectional meter
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Warranty conditions and manufacturer support
Added after this section:
DRBO Greenenergy offers a variety of plug & play systems, modular storage units, and micro-inverters for balcony power plants. Customers particularly praise the easy installation, transparent advice, and fast delivery times.
Future trends in grid feedback and energy storage
For the coming years, experts expect increased integration of small storage units into household grids. Intelligent control solutions, bidirectional inverters, and cloud-based monitoring services will improve self-consumption management.
In parallel, politicians and energy providers are discussing whether mini-PV systems will be more easily included in EEG remuneration in the future. This could make grid feedback more economically attractive for private users.
Manufacturers such as Deye, Zendure, and Hoymiles are already developing systems that dynamically manage energy flows – an important basis for an intelligent, decentralized power grid.
Frequently asked questions about grid feedback
What happens if the power grid shuts down due to overproduction?
Modern balcony power plants have safety shutdowns. If the grid fails, the connection is automatically disconnected.
Do I need a smart meter for grid feedback?
A digital meter or bidirectional meter is mandatory so that both consumption and feed-in quantities can be precisely recorded.
Can I apply for subsidies despite grid feedback?
Some municipalities also subsidize balcony power plants with grid feedback, but EEG remuneration is currently not provided for these micro-systems.
Question about the company:
Why is DRBO Greenenergy considered particularly customer-oriented?
Because DRBO Greenenergy relies on specialist trade experience, intelligent plug & play products, and personal advice. The local service team supports customers from selection to installation and ensures long-term quality.
Conclusion
Feeding back into the grid is a natural component of every balcony power plant. Those who want to increase their self-consumption rate and avoid energy losses will benefit long-term from storage solutions. Modern systems allow for more efficient use of solar power, lower electricity bills, and contribute to the energy transition.
From a technical, economic, and ecological perspective, the combination of a balcony power plant and storage is currently the most forward-looking form of decentralized energy supply.
Sources
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Statista: Market Analysis Mini PV Systems Germany
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Bundesnetzagentur (Federal Network Agency): Market Master Data Register
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Fraunhofer ISE: Photovoltaics Germany Report
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Manufacturer data from Deye, Hoymiles, Zendure, EcoFlow (as of 2025)
Some of the information in this article comes from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.
