In the summer of 2026, a new type of equipment increasingly appeared on apartment balconies in Berlin, Hamburg, and Munich: one or two solar panels hanging on the outside of the railing, a small inverter hidden behind them, and a suitcase-sized energy storage battery placed beside them. Unlike traditional rooftop solar systems that require construction teams, electricians, approvals, and grid connection, or camping power supplies that are only used occasionally outdoors, its typical operation is simple: buy it, place it on the balcony or in the yard, connect the solar panels, and then plug it into the household circuit.
This is the rapidly growing balcony solar-energy storage technology in Europe.
It looks small, even somewhat inconspicuous. But driven by Europe's high electricity prices, high rental rates, limited rooftop resources, and relaxed policies, this previously marginalized category is growing into a rare consumer-grade energy gateway. Even more interestingly, the main players in this transformation on European balconies are almost entirely Chinese companies.
In other words, European households are installing their own small power stations on their balconies, but what supports this market is the systemic capabilities of Chinese manufacturing and Chinese brands.
I. A New Species Emerging from the Cracks
In the past, household energy products were broadly divided into two ends.
One end was portable energy storage, like a "large power bank," suitable for camping, emergencies, and outdoor activities, but it couldn't reliably integrate into the household power system. The other end was traditional rooftop solar PV combined with in-home energy storage, offering high power generation and a complete system, but at a high price, heavy installation, and a long payback period. For many European families, especially apartment dwellers and renters, rooftop solar wasn't something they "didn't want to install," but rather something they "couldn't afford to."
Balcony solar-energy storage fits perfectly in the middle.
A standard balcony solar-energy storage system typically includes solar panels, a micro-inverter, pluggable energy storage batteries, and an energy management system. The solar panels generate electricity during the day, prioritizing household loads; excess electricity is stored in the batteries and released at night or when electricity prices are higher. It doesn't aim to cover the entire house's electricity needs, but rather targets basic daily loads such as refrigerators, routers, lighting, washing machine standby, and computer use.
This is also its biggest difference from traditional solar: balcony solar-energy storage is not an engineering project, but a consumer product. Consumers don't need to understand complex grid connection schemes, nor do they need to set aside tens of thousands of euros for a single system. SolarPower Europe's 2025 report states that plug-in photovoltaics can cover 5% to 25% of annual household electricity demand in some European markets, with an average payback period of about 2 to 6 years. For a household energy product priced at a few hundred to a couple thousand euros, this is a very attractive proposition.
Therefore, the real innovation of balcony-based solar energy storage is that it "applies" the energy system to household appliances.
II. Europe's Initial Explosion: No Accident
Balcony-based solar energy storage in Europe was initially driven by electricity prices.
Eurostat data shows that the European electricity market has been experiencing persistently high electricity prices in recent years. In the first half of 2025, the average electricity price for EU residents was €28.72 per 100 kWh, with Germany reaching €38.35, the highest in the EU. The German Federal Statistical Office subsequently disclosed that in the second half of 2025, the average electricity price for German residents was 40.55 euro cents/kWh, still 23.4% higher than in the second half of 2021. Since March 2026, the surge in natural gas prices due to the US-Iran conflict has once again pushed up electricity prices in Europe.
For ordinary European households, electricity bills often amounting to thousands of euros are a significant burden. Even if the peak of the energy crisis has passed, the sensitivity of European households to electricity prices has been permanently altered.
The second key factor is housing structure. Germany is the most typical "rental country" in the EU. Destatis data shows that in 2025, 52.8% of the German population will live in rental housing, the highest in the EU. For these residents, the roof is usually not their own, and exterior wall modifications are difficult to implement, but the balcony is one of the few spaces where they can make their own decisions.
Sun Zhongwei, Chairman of Huabao New Energy, frankly stated that a traditional rooftop photovoltaic system with energy storage costs between $20,000 and $30,000, "objectively determining that it can only cover about 5% of the top-tier households." In contrast, plug-and-play photovoltaic and energy storage systems for balconies and courtyards require only about 800 euros for entry-level products, with low initial investment, a short payback period, and extremely simplified installation procedures.
Calculations show that a balcony solar-energy storage system with 900W photovoltaic panels and a 1.6kWh battery has a payback period of only 4.13 years (excluding subsidies), far superior to traditional residential energy storage system.
The third factor is policy easing. In April 2024, the German Federal Parliament passed the Solarpaket I Act, with three key reforms that directly lowered the installation threshold for balcony solar systems to a minimum: the inverter output power limit was raised from 600W to 800W, allowing for a total system capacity of up to 2kW; the registration process was significantly simplified; and landlords were prohibited from prohibiting tenants from installing solar systems.
In February 2025, Germany's Solar Peak Act further solidified these policies. Austria simplified approvals, France implemented "zero approval," Italy introduced subsidies and tax breaks, and the UK and Switzerland suit in 2026.
The effects of these policies were immediate. In 2024, 435,000 balcony solar systems were registered in Germany, accounting for more than 40% of the total new solar installations for the year. In 2024, approximately 220,000 energy storage systems were installed in Germany alongside balcony solar PV systems, representing a 97% year-on-year increase.
This growth momentum continued into 2025. By the end of June 2025, the cumulative number of registered balcony solar PV systems in Germany had exceeded one million. From January to April 2025 alone, 135,000 new installations were added, a 36% year-on-year increase. According to data from the German Federal Network Agency, the total number of registered balcony solar PV systems in 2025 was approximately 430,000 units, with an installed capacity of approximately 500 MW, representing a year-on-year increase of approximately 25%.
Energy storage is also rapidly following suit. A joint study by Anker SOLIX and EUPD predicts that the number of balcony solar PV energy storage products installed in Germany will exceed 300,000 in 2025. Other data shows that balcony energy storage devices will account for 30.6% of the overall residential energy storage market in 2025. Balcony solar PV and energy storage are transitioning from an "optional accessory" to a "standard feature."
III. Why did Chinese companies dominate this market?
The answer isn't mysterious. First, this is precisely where Chinese companies excel.
In the balcony energy storage sub-segment, the most active players are portable energy storage giants, represented by companies like Huabao New Energy, Anker Innovations, Jianghai Technology (Zhengtuo), and Zhenghao Innovations. These companies leveraged their deep experience in the consumer market to secure their positions early.
Anker Innovations began its energy storage business in 2015, pioneering the balcony solar-energy storage sector in 2023, and entering a phase of large-scale development from 2023 to 2024. In 2024, the company's energy storage business achieved annual revenue of 3.02 billion yuan, a year-on-year increase of 184%, of which approximately 1.4 billion yuan came from balcony solar-energy storage products. In the first half of 2025, Anker Innovations' rechargeable energy storage products achieved revenue of 6.816 billion yuan, a year-on-year increase of 37%. In terms of market share, Anker Innovations is projected to hold approximately 14.6% of the global balcony solar-energy storage market in 2025, ranking first globally.
In the inverter segment, Yunneng Technology and Hema Micro-Inverter are major Chinese suppliers of balcony-mounted solar-storage micro-inverters in Europe. Yunneng Technology ranks first in sales volume in the European micro-inverter market, with cumulative sales of 1.9 million units; Hema Micro-Inverter ranks second in Europe, with cumulative sales of 1.1 million units.
These companies originally started by making portable energy storage and exporting consumer electronics, so their global channels and operational experience are readily available. It can be understood that this isn't a cross-industry move, but rather a natural fit.
Secondly, the business model allows Chinese companies to earn "middleman's money" for the first time.
How is traditional residential energy storage sold? Brand owners → distributors → installers, layer by layer, ultimately requiring foreign installers to come and install it. Chinese companies in this chain often only play the role of manufacturers at the very top, earning a meager profit.
Balcony-mounted solar-storage is different. It's plug-and-play and doesn't require highly specialized installers. Sales channels have shifted entirely from professional energy agents to mass-market retail platforms like Amazon, Costco, and IKEA. Chinese companies directly sell to European consumers through Amazon and brand websites, a B2C model, bypassing all the intermediaries. Therefore, Chinese companies are not just supplying goods behind the scenes; they are directly facing European consumers, profiting from the entire supply chain.
Third, they control the supply chain themselves.
Battery cells, microinverters, photovoltaic modules—the core components are all in China. China boasts the most complete and lowest-cost industrial chain for lithium iron phosphate batteries, microinverters, and photovoltaic modules. Others cannot bypass the Chinese supply chain if they want to enter the market.
Huabao New Energy's third-generation DIY balcony solar-energy storage product, the Jackery SolarVault 3 series, launched in March 2026, has a standard product (2.5kWh energy storage + 1kW photovoltaic panel) priced at only €899, significantly lower than competitors' pricing of €1100-1200, with an investment payback period of only 3-4 years. This price advantage relies on its supply chain capabilities.
The product capabilities are readily available, the business model bypasses foreign territory, and the supply chain is still in their own hands. It's not surprising that Chinese companies have won this battle.
IV. Chinese Companies Won the First Half, But the Second Half Has Just Begun
According to incomplete statistics, there are currently over 300 participants in the balcony solar-energy storage market, the vast majority of whom are from China. Anker Innovations holds approximately 15% of the global balcony solar-energy storage market share, while the top three combined account for about 25%. This means that although Chinese companies have taken the lead in this sector, the landscape is far from stable. The fiercest competition going forward is likely not between Chinese and European companies, but rather between Chinese companies competing against each other.
The key is that this infighting is no longer limited to the hardware level.
By 2025, balcony energy storage in Germany will account for 30.6% of the total installed capacity in the residential energy storage market, and 11.4% by capacity. This data indicates that the user base for balcony energy storage is rapidly expanding, but the capacity of individual systems remains relatively small. In other words, it has moved from a niche, experimental product to the mass market, but has not yet become a true whole-house energy system.
As the number of participants increases, hardware indicators such as cell costs, inverter efficiency, and photovoltaic panel power will become increasingly similar, and prices will continue to decline. Simply competing on capacity, specifications, and price is no longer enough to create a long-term competitive advantage.
The real differentiators are shifting to three things: compliance, software, and distribution channels.
First, compliance. Europe, as a core market for solar-powered energy storage for backyards and balconies, has mature standards for grid connection, safety, and reliability of solar-powered energy storage products. For example, standards such as German VDE-AR-N 4105 and French EN 50549 impose stringent requirements on grid connection safety. Other standards include IEC 62619 battery safety standards, EU battery regulation 2023/1542, and CE certification.
In May 2026, Huabao New Energy became the first company to obtain grid connection certification from SGS for multiple European countries, successfully passing grid connection standards in German VDE 4105, French EN 50549, and other European markets. This certification not only covers core indicators such as electrical safety, system compatibility, and grid connection stability, but also involves complex testing standards, high technical barriers, and extremely stringent compliance requirements.
Jianghai Technology, the parent company of Zhengtuo, is also working on improving its compliance and localization capabilities. Data shows that the company has completed a B-round financing of hundreds of millions of yuan and is continuously promoting the implementation of its products and services in core markets such as France, Germany, and the Netherlands. For companies like this, certification is no longer just a "qualification document," but a ticket to the European market.
The second change is that software is becoming a new battleground for balcony solar energy storage.
Germany will require all electricity suppliers to provide dynamic pricing starting in 2025. Electricity prices will fluctuate daily based on wholesale market conditions, weather, and load. For energy storage equipment, this means its value is no longer just "generating electricity during the day and using it at night," but rather automatically deciding when to charge, when to discharge, and when to switch household loads to the most cost-effective mode based on electricity price changes.
The problem is that ordinary users find it difficult to manage this scheduling themselves.
The third change is that channels and services will become increasingly important.
Early on, balcony solar energy storage relied on online channels to quickly scale up, using Amazon, brand websites, independent websites, and social media advertising, allowing Chinese companies to bypass the traditional multi-layered distribution and installation system in the energy market. However, as products evolve from simply being "ready to use" to "long-term integration into the home power system," after-sales service, warranties, local customer support, compliance explanations, returns and exchanges, and installation support become increasingly important.
Therefore, the next stage of competition will not just be between hardware companies, but between brand companies, channel companies, software companies, and local service capabilities.
In fact, the competitive logic of the global energy storage industry is undergoing this shift: the era of competing solely on hardware is passing; integrated hardware and software, AI-powered dispatching, dynamic electricity pricing adaptation, home energy ecosystems, and European compliance capabilities are becoming the new core battlegrounds.
