FAQs
Here you’ll find answers to the most frequently asked questions about our products and services.
From technical details to ordering – we’ve put together the most important topics for you.
If you still have questions, feel free to reach out to us using the contact form at the bottom of the page or book a consultation with us.
Frequently asked questions
Over 10,000 cycles – exceptionally long-lasting.
Our salt battery storage systems based on sodium-ion technology achieve a service life of over 10,000 charging cycles when used at 90% capacity.
Even with full utilization of the storage capacity (100% DoD – Depth of Discharge), at least 5,500 cycles to 80% residual capacity are still possible.
This makes Salzstrom storage one of the most durable and robust energy storage solutions on the market.
Compatible via AC coupling with Fronius inverters.
Our salt battery storage systems can be easily integrated into your system with a Fronius inverter via a proven AC coupling – flexible, reliable, and easy to implement.
DC coupling is currently not supported.
Contact us to discuss the specific implementation of your project. We’re happy to advise you.
Compatible via AC coupling with Huawei inverters.
Our salt battery storage systems can be easily integrated into your system with a Huawei inverter using a proven AC coupling – flexible, reliable, and easy to implement.
DC coupling is currently not supported.
Contact us to discuss the specific implementation of your project. We’re happy to advise you.
Compatible via AC coupling with Kostal inverters.
Our salt battery storage systems can be easily integrated into your system with a Kostal inverter using a proven AC coupling – flexible, reliable, and easy to implement.
DC coupling is currently not supported.
Contact us to discuss the specific implementation of your project. We’re happy to advise you.
Compatible via AC coupling with Sungrow inverters.
Our salt battery storage systems can be easily integrated into your system with a Sungrow inverter using a proven AC coupling – flexible, reliable, and easy to implement.
DC coupling is currently not supported.
Contact us to discuss the specific implementation of your project. We’re happy to advise you.
Compatible via AC coupling with SolarEdge inverters.
Our salt battery storage systems can be easily integrated into your system with a SolarEdge inverter using a proven AC coupling – flexible, reliable, and easy to implement.
DC coupling is currently not supported.
Contact us to discuss the specific implementation of your project. We’re happy to advise you.
Easy and flexible retrofitting – thanks to AC coupling.
With AC coupling, the salt battery storage system is connected to your overall system via the alternating current (AC) grid – typically using its own inverter.
This solution is particularly flexible and ideal for retrofitting existing systems or when different inverter types are being used.
The key difference lies in the voltage level:
Low-voltage batteries operate at voltages up to 60 volts
Above this threshold, we speak of high-voltage batteries
Low-voltage systems (e.g., 48 V) are easier to handle, safer, and usually more cost-effective. They are ideal for small to medium-sized residential applications.
High-voltage batteries operate at higher voltages and enable lower currents at the same power – reducing power losses and increasing efficiency. Especially useful for larger systems with higher energy demands.
A saltwater battery uses an electrochemical reaction with saltwater as the electrolyte. It is considered especially eco-friendly, but has some limitations:
low energy density: therefore more suitable for niche applications with low energy demand.
limited performance: makes them less suitable for applications with high energy demand or fast charging cycles.
Our salt battery storage, by contrast, is based on sodium-ion cells with an organic electrolyte. This technology offers performance comparable to conventional lithium systems, while being significantly safer and more environmentally friendly than traditional battery technologies.
No, Greenrock offered saltwater batteries based on a different electrochemical principle than our Salzstrom storage using sodium-ion technology.
They are therefore two fundamentally different technologies.
The company behind Greenrock, BlueSky Energy, is now insolvent.
Although the technology was considered eco-friendly, it showed technical weaknesses in practice and failed to gain a long-term foothold in the market.