Home storage systems for photovoltaics and energy utilisation

The use of photovoltaics is increasingly developing in the direction of integrated energy systems. Power generation alone is no longer enough; the key question is how energy is stored and made available for everyday use.

This is precisely where modern home storage systems come in, mediating between generation and consumption. Such a system is designed to temporarily store self-generated solar energy and utilise it at different times. This not only changes self-sufficiency, but also the role of households and businesses in the energy system as a whole.

Byd combines battery cells and home storage systems

Byd is one of the world's largest manufacturers of battery cells and pursues a comprehensive approach along the entire energy chain. In addition to photovoltaic modules, the portfolio also includes stationary storage solutions and electromobility applications. The Shenzhen-based company is internationally active and focuses on a concept that combines the generation, storage and utilisation of energy. The development ranges from small home storage systems to large-scale battery systems for commercial applications. A central element of this approach is the so-called Battery Box, which is designed as a modular energy storage system and is used in both private and commercial environments.

High-voltage series for flexible home storage applications

The high-voltage series of the Battery Box is designed for the intermediate storage of solar energy. The design is modular so that the capacity can be gradually expanded. Users can start with a smaller configuration and adapt the system later to increasing requirements. Expansion is achieved by simply stacking additional modules. This allows the storage system to grow in line with actual demand without the need for a complete replacement. This gives installers the opportunity to design customised systems. Another aspect is compatibility with different inverters. Systems can be combined with solutions from different manufacturers, which makes integration into existing systems easier.

Lithium iron phosphate as cell chemistry for safety

The cell chemistry used is based on lithium iron phosphate. This technology is considered particularly stable within lithium-ion batteries. It is characterised by a high level of thermal safety and reduces the risk of critical conditions during operation. The importance of this property is particularly evident in everyday life. Home storage systems are permanently installed in buildings and must function reliably for many years. Stability and safety are therefore at the centre of development. The performance of the systems results directly from the battery cells used, which are produced by the manufacturer itself. This allows control over the quality and properties of the storage systems.

Scaling and system integration in everyday life

A key feature of the systems is their scalability. Storage systems are not over-dimensioned, but are customised to suit requirements. In practice, this often means a design that covers the energy demand overnight. This strategy takes into account the use of resources. Batteries contain raw materials whose use must be optimised. Too much storage would tie up unnecessary capacity without providing any additional benefit. The most important properties of the systems at a glance:

• modular design for flexible expansion
• Use in the private and commercial sector
• Compatibility with various inverters
• Cell chemistry with high thermal stability
• Designed for real everyday energy requirements

Classification in the context of electromobility and the energy system

Byd combines stationary storage with other applications in the energy sector. This includes electromobility in particular, where stored energy can be used directly. The company is one of the largest manufacturers of electric vehicles in the world. The connection between photovoltaics, storage and utilisation thus becomes part of a more comprehensive system. Energy is generated, stored and then used in various areas - from households to vehicles. At the same time, the company is working on new battery technologies. However, approaches such as sodium-ion or solid-state batteries are still under development and are not currently in widespread use.

Development towards integrated energy systems

The systems presented show a shift in the way energy is handled. Photovoltaics are no longer viewed in isolation, but as part of a larger context. Storage systems play a central role in this. They make it possible to shift energy over time and become less dependent on external sources. At the same time, a more networked system is emerging in which various applications are linked together. This development indicates that future solutions will rely less on individual components and more on integrated concepts that combine generation, storage and utilisation.