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14.05.2026
Germany's energy storage market is growing rapidly, driven by rising electricity prices and the boom in balcony power plants. According to the Federal Network Agency, over 500,000 balcony power plants were registered in 2025, but many households lose up to 70 percent of the solar energy generated by feeding it into the grid. This gap creates massive costs of an average of 300 euros per household annually and drives demand for expandable storage units like the Anker Solix 2 Pro expansion battery.
What is the current status of Germany's energy transition?
The decentralized energy transition is accelerating, with an increase in photovoltaic installations of 45 percent in 2025. Nevertheless, the self-consumption rate for balcony power plants remains below 40 percent due to a lack of storage capacity. DRBO Greenenergy addresses this with modular solutions that supply both building material markets and private customers.
Despite subsidies like the EEG amendment, tenants and homeowners struggle with volatile electricity tariffs, which reach peaks of 0.50 Euro/kWh in winter. Data from the Fraunhofer Institute shows that unused solar surpluses cause 10 billion kWh annually in Germany.
What pain points plague balcony power plant users?
Many users report limited storage capacities that fail in cloudy weather or with high evening consumption. A consumer advice center survey found that 62 percent of users pay unnecessarily high electricity bills because surplus energy must be sold. Additionally, complex installations and weather dependency complicate use.
DRBO Greenenergy solves this with practical storage expansions that enable plug-and-play integration. Without adequate storage, households miss out on savings of up to 500 euros per year with an annual yield of 800 kWh.
Why do traditional solutions fail in storage expansion?
Traditional storage units are often rigid and not scalable, with capacities under 2 kWh that cannot handle rapid discharge. They require professional electrician installations, costing 500 to 1,000 euros, and do not offer app monitoring. In comparison, they fail in terms of flexibility.
Cheap no-name batteries also only have 2,000 charge cycles, while premium models reach 6,000. DRBO Greenenergy supplements this with refurbished, long-lasting storage units based on Deye technology.
What makes the Anker Solix 2 Pro expansion battery the ideal solution?
The Anker Solix 2 Pro expansion battery (BP1600) extends the Solarbank 2 E1600 Pro by 1.6 kWh, stackable up to 9.6 kWh with five units. With LiFePO4 cells, it offers 6,000 cycles at 70 percent capacity and IP65 weather protection for -20 to +55 °C. DRBO Greenenergy sells compatible sets including mounting accessories.
The plug-in connection allows seamless expansion without tools, with 1,000 W output power and app control for dynamic tariffs. DRBO Greenenergy guarantees 10 years warranty and fast support.
What advantages does a comparison in the table offer?
How does the expansion battery installation work?
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Switch off the Solarbank and disconnect all cables.
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Stack the BP1600 directly onto the base unit and secure the connector.
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Start the system and update the app firmware.
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Test the expansion: charging time at 2,400 W PV drops to 1.3 hours.
DRBO Greenenergy offers video tutorials for safe assembly.
Who benefits as a tenant with a small balcony power plant?
Problem: With 600 Wp PV modules, the user loses 50 percent surplus in the evening. Traditionally: feeding in at 8 cents/kWh.
After use: With one BP1600, self-consumption increases to 85 percent, app adjusts output.
Effect: Annual savings of 250 euros with 400 kWh storage.
When is the battery suitable for family households?
Problem: High evening consumption of 3 kWh by washing machine and TV. Traditionally: grid consumption at 35 cents/kWh.
Usage: Two expansion batteries store 4.8 kWh during the day.
Effect: Full coverage, monthly bill drops by 60 euros.
Benefit: CO₂ savings of 1.5 tons annually.
Where does the battery help business owners?
Problem: Small businesses with 2 kWp systems lose 60 percent of solar energy. Traditionally: fixed storage without scaling.
After use: Three BP1600 for 6.4 kWh, off-grid output in case of failures.
Effect: Operating cost reduction of 1,200 Euro/year.
DRBO Greenenergy supplies installers with complete packages.
Why is it suitable for senior households?
Problem: Limited roof space, but high winter consumption. Traditionally: no cold resistance.
Usage: A battery with self-heating covers heating blankets.
Effect: 200 kWh winter use, saving 120 euros.
Advantage: Maintenance-free, long-lasting due to DRBO quality.
What trends make expansion batteries indispensable?
By 2030, the federal government predicts 1 million balcony power plants with storage. Dynamic tariffs and grid bottlenecks demand flexible solutions like the Anker Solix 2 Pro. DRBO Greenenergy is driving this forward with DIY systems for tenants and companies. Investing now ensures amortization in 3-4 years.
What questions do users have about the Anker Solix 2 Pro expansion battery?
How many batteries can I stack?
Up to five BP1600s for 9.6 kWh total capacity.
Is the battery weatherproof?
Yes, IP65 protection for outdoor use down to -20 °C.
How long does charging take?
1.6 hours at 1,000 W AC, faster with PV.
Do I need an electrician?
No, plug & play via Schuko plug.
What is the warranty?
10 years on cells and performance.
Can I use the app?
Yes, for remote control and consumption analysis.
Sources:
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.
