Safe, fast and ready for the future
Always ready for energy security
Independent of electricity prices
Storing your own energy means paying less to your energy supplier. This leaves you with more money each month for what really matters.
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Stylish design
Sleek, stylish and space-saving – the design fits seamlessly into any home, without compromising on performance.
Smart investment
A SAX battery pays for itself in a short time and then delivers profits for years to come.
Future-proof
Protect yourself against rising prices and prepare your home for the energy of tomorrow.
70 %
Maximum savings
Save up to 70% on your energy bill with your own generated and stored electricity.
< 25 dB
Whisper-quiet performance
Whisper-quiet – quieter than a library, unobtrusive in your daily life.
Europe's No. 1 battery
Independently tested and awarded best-in-class performance in the HTW storage test. With SAX, you're choosing the highest performance and reliability.
Batteries at a glance
Two models – one goal: energy independence
Maximum independence starts with the right battery. Compare SAX models and choose the solution that optimally protects your home.
5,76 kWh
7,68 kWh
5,2 kWh
7,0 kWh
17,3 kWh
total 23 kWh
LiFePO4
LiFePO4
3.2V; 15Ah
3.2 V; 20 Ah
230 V AC, 1-phase
230 V AC, 1-phase
4,6 kW
4,6 kW
3,68 kW
3,68 kW
up to 2.5 kW
1.4 kW to 3.5 kW
20 A
20 A
16 A
16 A
53 kg
72 kg
530 x 530 x 250 mm
620 x 620 x 250 mm
passive cooling
passive cooling
< 25 dB
< 25 dB
Your energy, your freedom
Save smart and remain independent of rising electricity prices.
With a SAX home battery, you can make the most of your solar energy. Pay less to your energy supplier, save more for yourself – today and in the future.
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For a greener future
With every kilowatt hour saved, you contribute to the climate and ensure a livable future for future generations.
The SAX Power Home Plus – 7.7 kWh Home battery is the smart choice for anyone striving for true energy independence. This advanced storage system safely and efficiently stores the energy generated by your solar panels during the day, so you can use it exactly when you need it most – in the evening, at night, or during peak energy tariff periods.
Thanks to its high efficiency and compact design, you'll not only benefit from lower energy costs but also from a reliable and future-proof solution that fully adapts to your household's energy needs. This saves you hundreds of euros per year, reduces your dependence on energy suppliers, and actively contributes to a more sustainable future.
In the current HTW ranking, SAX Power clearly demonstrates that it stands out and holds a leading position.
The world's first storage with integrated inverter function in battery management – without a hybrid inverter.
Thanks to innovative multi-level technology, the SAX Power Home Plus delivers top performance with 98.0% discharge efficiency.
The highest efficiency performance in the entire 5 kW category – SAX Power sets new standards.
The direct 230V output control avoids the expensive hybrid inverter – installation made easy
The beginning
A vision takes shape
The idea for a completely new storage system is born. The goal is to develop a system that is not only more efficient, but also more sustainable, safer, and easier to integrate than all existing solutions. With this vision, SAX Power lays the foundation for a technology that will transform the energy market.
Technological breakthrough
The Multi-Level technology
After intensive years of research and development, the major breakthrough arrives: Multi-Level technology becomes a reality. This unique concept enables maximum efficiency and the highest level of safety through the intelligent switching of individual cells. This creates a clear advantage over conventional battery technologies.
Market introduction
The first SAX Power battery
The introduction of the SAX Power 5.8 kWh storage system marks a new era for households and businesses. Compact in design, powerful in operation, and future-proof in technology – this storage system sets new standards. Customers benefit from a solution that integrates seamlessly into existing energy systems.
Strong market position
Efficiency at the highest level
SAX Power impresses with excellent efficiency values in the renowned HTW storage inspection. The technology proves its strength in direct comparisons with leading manufacturers and sends a clear signal to the market: SAX Power is among the top European energy storage companies.
Test winner
Number 1 in Europe
SAX Power reaches a milestone: the storage system is declared the test winner in the HTW storage inspection. This sets a new standard for efficiency and reliability, establishing SAX Power as the number one in Europe. This confirms not only its technological leadership but also the trust of thousands of customers.
FAQ
Frequently Asked Questions – We have the answers for you
View our customers' most frequently asked questions. Still have questions? Please contact our customer service.
Does a home battery make sense for private individuals?
You can also use a photovoltaic system without storage and only consume the electricity when it's generated. However, a home battery offers several advantages:
- Independence: both regarding energy supply and independent of rising energy prices. Safety during power outages (emergency power).
- Economic return: the battery is an investment that pays for itself once it is written off.
- Sustainability: You can utilise a greater share of your self-generated solar energy – generated in an environmentally friendly way and consumed directly on site.
How big is the battery?
Because SAX systems lack a separate inverter for the battery – unlike conventional systems – the entire system is very compact. In the 5.8 kWh version, the battery is only the size 53 × 53 × 25 cm and can be easily integrated.
How is the battery controlled?
The battery is controlled by a smart meter, ideally installed by an electrician behind the electricity meter. This smart meter measures both the generated power that is fed back into the grid and the power drawn from the grid. The smart meter optimizes operation so that excess PV power is stored and used when needed. No power is fed back into the public grid, nor is any power drawn from the grid, as this is not economically viable.
What do I benefit from this new technology, besides not needing an inverter?
With SAX storage, you get an extremely high level of safety: the system can be shut down within 0.2 milliseconds, after which the entire storage falls below the safe voltage of 40V – so you can touch it anywhere! This prevents accidents due to high voltage or overheating. The service life also benefits: conventional battery systems with series connections are only as strong as their weakest cell, and production variations and, above all, aging always result in losses. With the SAX circuit, the cell blocks are controlled individually, so that each cell can be optimally utilized. Even if one cell fails completely, the rest of the battery remains usable. The system is also extremely robust, because thanks to the special circuit, the electronic components are only exposed to a low voltage – significantly reducing the risk of failure.
Who can tell me for sure that SAX's claims about their storage are also correct?
The revolutionary approach of SAX technology has been confirmed by independent bodies such as the Fraunhofer Institute – the accompanying documents are available upon request. American investor Walden International also thoroughly tested SAX and its technology before investing a seven-figure sum in 2021. Furthermore, SAX received recognition through awards at renowned competitions: the German Innovation Award in May 2021 and the ees Award in July 2021, presented by Intersolar, the world's leading trade fair series for the solar energy industry. SAX will again be presenting its storage systems at this year's Intersolar trade fair in Munich in October.
How can I operate and check the SAX battery?
A clear dashboard allows you to monitor the battery in your web browser and a smartphone app. Data such as charge status can be viewed, measurement data is displayed graphically, and the battery can be switched on and off. After delivery, you can create an account using the battery's serial number (website: app.sax-power.net). The SAX batteries are connected to the SAX Power web server via a LAN interface. The values are also stored in a database and are therefore available for maintenance purposes.
Do I also have an emergency power supply with a SAX battery?
Yes, there's a separate connection on the housing next to the regular power connection. If the mains power fails, the battery automatically detects this and switches to backup power. This means devices connected to the backup power connection are always powered.
Can I start with one battery and add an extra later?
The battery can easily be expanded to power two or three devices, even at a later date. Because we manage each cell block individually and utilize it optimally, devices installed later are not affected by older batteries whose capacity has diminished due to natural aging. You can always utilize the full capacity of each device.
I don't have a PV system. Can I still use the battery, for example, as an emergency power source?
Not in the standard application, as this provides "zero control" of the battery, meaning no power consumption and no feed-in to the public grid. However, the battery does support Modbus RTU and Modbus TCP/IP. Technically savvy customers can therefore control the battery according to their own requirements via an external control unit, provided they program it accordingly.
