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With the right energy storage system, you become more independent of your energy provider.
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During the day, your photovoltaic system generates more energy than you currently consume – and that’s exactly where the energy storage system comes into play. It stores your surplus solar power and makes it available again in the evening or at night. This allows you to optimize your energy use, lower your electricity costs, and become more independent of rising energy prices.
In combination with smart energy management, your storage system can do even more: it operates in a way that supports the grid and maximizes cost-efficiency. This means that – especially in winter – it can charge cheap electricity from the grid and discharge it when prices are higher. This process is based on weather, consumption, and electricity tariff forecasts. As a result, your system doesn’t just react to current conditions, but manages energy proactively.
Wondering when an energy storage system pays off or what size is right for your home? Don’t worry – we’ve already asked ourselves these questions and have the right answers for you.
Why use an energy storage system?
Energy storage systems bridge the time gap between power generation and energy consumption. During the day, your photovoltaic system often produces more energy than is currently needed. An energy storage system captures this surplus and makes it available precisely when you need it – such as in the evening or at night.
Combined with intelligent energy management, the stored electricity can be used efficiently and purposefully. This allows you to increase your self-consumption, stabilize your energy costs, and become more independent of rising electricity prices.
This makes a modern energy storage system far more than just a battery – it is a core component of a well-thought-out, self-sufficient energy supply.
Natur Energietechnik is a certified specialist partner of sonnen.
sonnenBatterie 10
Experience Europe’s best-selling battery storage system for maximum independence.
The sonnenBatterie stores the solar power you generate and provides it exactly when you need it – day and night. This allows you to reduce your electricity costs, become more independent from your energy supplier, and sustainably power your home with your own energy. The integrated energy manager intelligently controls consumption and ensures maximum efficiency. With sonnen’s flexible storage models, you will find the system that perfectly matches your energy needs.
Highlights
- Safe & long-lasting: Lithium iron phosphate technology
- Quality: Made in Germany
- Smart home ready: Controls for heat pumps, charging stations, and heating elements
- Access: Access to the sonnenFlat X
- Optional add-ons: sonnen Charger | sonnen Protect 4000 | sonnen Protect 8000
Technical Details:
- Nominal battery capacity: From 5.5 kWh to 198 kWh (up to 9 units in cascade!)
- Max. inverter efficiency: 95.4%
- Max. battery efficiency: 95.9%
- Durability: 10,000 charging cycles, battery lifespan designed for 20 years
- Warranty: 10-year manufacturer warranty
sonnenBatterie 10 hybrid
sonnenBatterie 10 peformance
sonnenBatterie 10 perfromance+
Additional Solutions in the sonnenBatterie 10 Series
Not every household has the same requirements regarding power output, backup power, or system integration.
That is why sonnen offers the sonnenBatterie 10 in various configurations – ranging from hybrid solutions to performance variants with increased power output.
Together, we will find the solution that perfectly matches your home, your consumption behavior, and your future plans.
For more information on the available variants, please visit sonnen:
Huawei FusionSolar
Intelligent storage solution with the new LUNA2000 S1 series
With Huawei FusionSolar, you receive a fully integrated energy system consisting of an inverter, battery storage, power optimizers, and a monitoring app. At its core is the new LUNA2000-7/14/21-S1 series—a modular storage solution designed for demanding residential households.
Highlights
- Safety & Intelligence: Secure lithium iron phosphate (LFP) technology with intelligent battery management (cell monitoring).
- High Efficiency: Direct DC-coupling for optimal synchronization with Huawei hybrid inverters, ensuring minimal conversion losses.
- Backup Capability: Emergency/backup power solutions available.
- Ease of Control: Monitoring and management via the FusionSolar app.
Technical Details
- Usable capacity: 7 kWh, 14 kWh, or 21 kWh per tower.
- Design: Modular tower system for flexible expansion and a compact footprint.
- Warranty: 10-year manufacturer warranty.
Tesla Powerwall 3
Integrated high-performance solar and battery system.
The Tesla Powerwall 3 is a fully integrated solar and battery system with a built-in hybrid inverter. It stores excess solar power or low-cost grid electricity and makes it available automatically whenever needed—for example, in the evening, during periods of high electricity prices, or for backup power operation. With a usable energy capacity of 13.5 kWh and high peak power, the Powerwall 3 is also suitable for power-intensive households. Depending on the system design, an emergency power supply can be implemented via the Backup Gateway 2. The system is monitored and controlled conveniently via the Tesla app.
Highlights
- Capacity: 13.5 kWh usable energy capacity
- Integrated Technology: Hybrid inverter with 3 MPPTs
- Peak Power: High starting power (up to 185 A) for larger appliances
- Grid Connection: Single-phase connection (230 V)
- Scalability: Scalable with up to 4 Powerwall 3 units + expansions
- Warranty: 10-year manufacturer warranty
Technical Details
- AC output power: 4.6 kW
- PV input: Up to 13 kWp
- Installation: Indoor and outdoor use (IP55)
Is a energy storage system actually worth it – and how quickly does it pay for itself?
A energy storage system is worth it if you want to make the most of your own solar power. Instead of feeding it into the grid for only a few cents, you use the energy exactly when you really need it – making you more independent from your energy supplier. This noticeably reduces your electricity costs. We will show you when and how your storage system pays off for you – individually and clearly.
What is the right energy storage size for my household?
The right energy storage size depends on how much electricity you consume daily and the size of your photovoltaic system.
As a rule of thumb, the storage system should cover about one-third to one-half of your average daily consumption – which is usually between 10 and 20 kWh for a single-family home. An energy storage system that is too small can limit your self-consumption, while one that is too large is often not cost-effective.
Our experts at Natur Energietechnik will provide you with individual advice to ensure your energy storage system perfectly matches your energy needs – both today and in the future.
Can I retrofit my existing energy storage system or expand it at a later date?
Yes. The energy storage systems we install feature a modular design and can be expanded as your energy needs grow. For example, if you add a Wallbox, a heat pump, or additional appliances, the storage system can be adjusted accordingly.
We will assess whether and to what extent an expansion makes sense on an individual basis—taking both technical and economic factors into account. This ensures your energy system remains flexible and grows along with your requirements.
What happens if there is little sunshine or the energy storage system is empty?
Don’t worry, your home will remain reliably supplied with electricity at all times. As soon as the energy storage system is empty or the photovoltaic system provides too little energy, electricity is automatically drawn from the public grid. This transition is seamless—you won’t even notice it.
In combination with intelligent energy management, your energy system is not just controlled reactively, but proactively. Based on weather forecasts, consumption data, and—if applicable—dynamic electricity tariffs, the system decides when to store energy, when to charge, and when to draw power from the grid.
Natur Energietechnik ensures the intelligent coordination of your PV system, energy storage, and the grid—providing maximum supply security and economically optimized energy usage in any weather.
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4 steps to sustainable energy
Whether it’s a photovoltaic system, energy storage, or a wallbox – we will show you how to cleverly generate, store, and use your own energy. Step by step toward more independence, sustainability, and a sense of well-being in your everyday life.
On-Site Appointment
Our experts evaluate your situation personally and in detail, ensuring a tailored approach for your energy project.
Installation
We manage the entire installation process, ensuring meticulous attention to every detail—down to the smallest component.
Maximize Solar Energy
Produce your own solar power, benefit from flexible storage, and take control of your energy consumption with intelligent management.