EEG Energy Engineering Germany GmbH

Battery energy storage system

Reliable energy storage for every application

Which battery technologies are used?

Whether in private households or on an industrial scale, battery storage systems play a central role in modern energy supply. Different technologies are used, each with specific strengths depending on the requirements:

 

Accumulators

Despite its limitations, this classic technology continues to be widely used.

Its typical features are:

  •  Proven technology with comparatively low investment costs
  • Limited service life (approx. 300–500 charging cycles) and lower efficiency
  • Ideal for emergency power systems, smaller stand-alone solutions, or as starter batteries in vehicles

 

Lithium-ion batteries (LIB)

Lithium-ion systems are currently the most widely used storage solutions on the market.

Their typical features are:

  • High energy density and efficiency with efficiency levels of up to 95%
  • Long service life and versatile applications, for example in solar systems, battery storage containers, or in the home
  • Flexible scalability for a wide range of applications, from home batteries to large-scale storage

 

Sodium-ion batteries (NIB)

Sodium-ion systems are becoming increasingly important as a sustainable alternative to lithium-ion.

Their typical characteristics are:

  • More environmentally friendly materials and cheaper production
  • Solid performance in stationary storage and potentially also in electromobility
  • Lower energy density, which makes them particularly interesting for applications with sufficient space

 

Redox flow batteries 

This innovative technology is particularly suitable for long-term energy storage.

Their typical characteristics are:

  • Flexibly scalable and suitable for both short-term and long-term storage processes
  • Currently still in the development stage and not widely used
  • Applications include: as a buffer for wind turbines or backup for mobile phone stations

 

Commercial storage Lithium iron phosphate batteries (LFP) 

Lithium iron phosphate systems are a particularly safe and durable variant within lithium-ion technology.

Their typical features are:

  • High thermal and chemical stability, particularly safe in operation
  • Long service life with up to 10,000 charging cycles
  • Lower energy density compared to other lithium-ion systems, but very robust
  • Versatile applications: ideal for stationary storage solutions in the private sector, in industrial applications, or with photovoltaic systems

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