Weatherproof, non-flammable battery housing for Varta lithium batteries

combined with 2x 18 kW SMA inverters

Robust weather protection & maximum safety

This weatherproof and non-flammable enclosure was specially developed for the safe use of Varta batteries (see VdS 3103 guidelines). The fully closable design reliably protects against weather and external influences and is ideally suited for outdoor use.

Optimal temperature control & insulation

Thanks to the high-quality, non-combustible 50 mm mineral wool insulation, the batteries always remain within their optimal temperature range. An integrated heater, a fan, and intelligent temperature control ensure constant operating conditions – regardless of the outside temperature. This keeps the batteries operating at their best.

Well-designed equipment for immediate use

The housing is internally illuminated and features its own ventilation openings with robust aluminum grilles for temperature regulation. In addition to device plugs and sockets, fuse boxes and two powerful SMA 18 kW inverters are also integrated, enabling immediate commissioning. This capacity ensures sufficient power supply for a single-family home and charging for an electric vehicle.

Practical handling & flexible installation

For easy transport and flexible setup, the enclosure is equipped with M16 sockets welded into the roof for lifting eyes and forklift pockets. These well-thought-out details simplify installation and make the system particularly user-friendly.

NOTES VdS 3103:

Requirements for lithium storage systems in buildings

The guideline VdS 3103 is a Technical information sheet of the German Insurance Association (GDV) It describes the most important requirements for the safe use of lithium batteries and is a key benchmark, especially for large storage systems for photovoltaic installations. Although it is not a legal requirement, it is frequently requested by insurers in practice and serves as a basis for the planning, installation, and operation of battery storage systems in buildings.

Significance of VdS 3103 for PV storage

Especially with larger lithium storage systems, there are no one-size-fits-all standard solutions. Instead, insurers require an individual risk analysis and case-by-case coordination. The requirements depend on the size, capacity, and installation situation of the storage system.

For operators and planners, this means: Failure to comply with the VdS guideline may result in limitations on insurance coverage or additional requirements.

Safe installation of lithium storage systems

A key aspect of VdS 3103 is the safe installation of battery systems within buildings. Large lithium storage systems should:

be installed in a separate, fire-resistant room
alternatively, be housed in a separate fire compartment
They must be placed at a sufficient distance from other uses and flammable materials.

These measures serve to minimize the risk of fire spreading and to limit damage to the building.

Battery capacity limitations

To reduce potential fire loads, the VdS guideline recommends:

Limitation of installed capacity per fire compartment
Division of large storage systems into multiple units
spatial separation of individual battery systems

This prevents a single event from causing widespread damage.

Requirements for operation and installation

In addition to structural and technical safety, VdS 3103 sets clear requirements for operation:

Compliance with all manufacturer specifications
Protection against short circuits and mechanical damage
Avoidance of overheating and unsuitable environmental conditions
Use of tested and approved battery systems

These measures contribute significantly to long-term operational reliability.

Handling defective lithium batteries

Damaged or conspicuous batteries pose an increased risk and must be:

be taken out of service immediately
must be stored in a secure area
be disposed of or tested properly

Improper handling can cause significant safety risks.

Conclusion: VdS 3103 as a standard for secure battery storage systems

VdS 3103 has established itself as the central standard for the safe operation of large lithium storage systems in buildings. It requires a combination of structural, technical, and organizational measures, as well as close coordination with the insurer.

For operators of PV systems, this means: Those who focus on standards-compliant planning early on not only increase safety, but also ensure long-term insurance coverage.