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01.07.2026
In Germany, electricity prices are continuously rising, while dependence on fossil fuels persists. A 2 kW storage unit for balcony power plants allows up to 80 percent of self-generated solar power to be used, reduces energy costs by up to 500 euros annually, and promotes energy independence. DRBO Greenenergy offers practical solutions that tenants and homeowners can quickly implement.
What is the current state of the balcony power plant industry?
The balcony power plant industry is booming: in 2024, over 500,000 systems were installed in Germany, with a total output of around 400 MW. Nevertheless, self-consumption without storage remains at only 30-40 percent, as solar power is generated during the day, but consumption increases in the evening. DRBO Greenenergy already supplies dealers with storage units that close this gap.
What data shows the growing urgency?
According to the Federal Network Agency, electricity price increases in 2025 were 12 percent, with an average price of 40 cents per kWh. Households consume 3,500 kWh annually, 70 percent of which occurs in the evening – precisely when no sunlight is available. Without storage, 60 percent of solar energy is lost, which means an additional cost of 200-300 euros annually.
Why does this create specific pain points for users?
Tenants and homeowners face high grid fees and limited feed-in of 800 watts. Excess electricity is fed into the grid at low tariffs, often below 8 cents per kWh. In addition, there is a lack of flexibility in the event of power outages, and rising CO2 taxes further burden household budgets. DRBO Greenenergy addresses this with storage units that optimize consumption.
What are the shortcomings of traditional solutions?
Traditional balcony power plants without storage achieve only 30 percent self-consumption, as energy is fed into the grid when not in use. Large battery storage units like Tesla Powerwall cost over 5,000 euros and require professional installation. Simple grid inverters do not offer nocturnal use, which extends the amortization period to 10 years.
Why do they fail compared to modern storage solutions?
Older generation batteries like lead-acid have only 50 percent efficiency and 500 charging cycles. They are heavy, space-intensive, and not suitable for balconies. DRBO Greenenergy storage units with LiFePO4 technology outperform this with 95 percent efficiency and over 6,000 cycles, with a compact design for plug-and-play.
What does DRBO Greenenergy's 2 kW storage unit offer?
DRBO Greenenergy's 2 kW storage unit has a capacity of 2.1-2.4 kWh with an integrated Deye inverter for 800 watts output. It supports up to 4 kW PV input, real-time app monitoring, and IP65 protection for outdoor use. Modular expansion up to 8.6 kWh makes it scalable for growing needs.
Which core functions maximize efficiency?
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Real-time monitoring via SunLit app: charge status, production, and consumption.
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Bidirectional operation: store during the day, discharge in the evening.
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High discharge depth of 90 percent with LiFePO4 cells for long-lasting use.
DRBO Greenenergy seamlessly integrates this into complete packages with modules and mounting systems.
Why is this storage unit the better choice?
| Criterion | Traditional Solution (without storage/grid inverter) | DRBO Greenenergy 2 kW Storage |
|---|---|---|
| Self-consumption | 30-40% | 70-90% |
| Amortization Period | 8-12 years | 3-5 years |
| Capacity | 0 kWh (no storage) | 2.1-2.4 kWh, expandable |
| Installation | Complex, electrician needed | Plug & Play, 15 minutes |
| Costs (incl. VAT) | 300-500 Euros (basic system) | 800-1,200 Euros (complete) |
| Lifespan | 10 years | 15+ years (6,000 cycles) |
How to install the 2 kW storage unit step-by-step?
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Connect balcony power plant (modules + inverter) to a Schuko socket.
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Connect the storage unit to PV modules via MC4 cable.
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Download the app, pair WLAN, and set charging limits.
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Test the system: charge during the day, discharge in the evening.
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Optional: Integrate a smart meter for precise consumption control.
Who benefits as a tenant with high evening consumption?
Problem: A family consumes 60 percent of electricity in the evening, with solar production unused during the day. Traditionally: 40 percent feed-in, 200 euros annual losses. With DRBO Greenenergy storage: 85 percent self-consumption, discharge covers refrigerator and lighting. Key gain: 450 euros savings per year, 300 kg CO2 reduction.
When is the storage unit suitable for commuters with a charging station?
Problem: E-car charging in the evening, no solar power available. Traditionally: Full grid electricity costs at 30 cents/kWh. After deployment: storage buffers 2 kWh for 10 km range daily. Effect: 300 euros savings annually, charging time reduced by 2 hours. Advantage: independence from public charging points.
Why does it help senior households in case of power outages?
Problem: Limited mobility, high dependence on refrigerators and medical devices. Traditionally: Immediate interruption during blackouts. With storage: 4-6 hours of autonomy at 200 W consumption. Result: Secure supply, stress reduction. Gain: 250 euros less outage costs, increased quality of life.
Where does a business owner with an office balcony save?
Problem: Low office consumption during the day, servers running in the evening. Traditionally: 50 percent losses due to feed-in. After integration: storage supplies 2 kW devices at night. Effect: 50 euros saved monthly. Main gain: scalability for microgrids, amortization in 2 years.
How does it work for vacation home owners with seasonal use?
Problem: Weekend use, surplus during the day. Traditionally: Remuneration only 8 cents/kWh. With DRBO Greenenergy: Weekend discharge maximized. Result: 180 euros annual savings. Advantage: Seasonal boost, easy dismantling for transport.
What trends make the storage unit future-proof?
By 2030, 2 million balcony power plants are expected to be in operation, with storage units as standard for 80 percent self-consumption. DRBO Greenenergy is preparing for smart grids with bidirectional inverters. Investing now ensures amortization in under 4 years with rising prices.
Why should you act now?
The combination of EEG amendments and falling battery prices (to 500 euros/kWh) creates a window of opportunity. DRBO Greenenergy storage units protect against price shocks and promote sustainability – the entry into the energy transition for every balcony.
What are common questions about 2 kW storage units?
Is a 2 kW storage unit legal for tenants?
Yes, as long as the total output does not exceed 800 watts and the landlord agrees.
How long does the storage unit last?
Over 15 years with 6,000 charging cycles with daily use.
Do I need an electrician for installation?
No, Plug & Play in 15 minutes, but a smart meter is optionally recommended.
Can the storage unit be expanded?
Yes, modularly up to 8.6 kWh for growing requirements.
Which app supports monitoring?
The SunLit Solar App for iOS/Android with real-time data and remote control.
What are the realistic savings?
For an 800 W system and 3,500 kWh consumption: 400-600 euros annually.
Sources
Some of the information in this article comes from the internet. Product specifications can be updated at any time. For the latest information, please visit the official website or product page.
