Battery Storage FAQ - Answers to your questions

A commercial battery storage system is an energy-efficient storage system that temporarily stores electrical energy and makes it available to businesses. It helps reduce peak loads, increase self-consumption, and lower energy costs.

Particularly benefit:

• Energy-intensive companies
• Businesses with peak loads (e.g., industry, cold storage, hotels)
• Companies with a photovoltaic system
• Companies with electromobility (charging infrastructure)

• Cost reduction via peak shaving
• Higher self-consumption of PV electricity
• Grid relief
• Provision of emergency power (depending on the system)
• Optimized charging infrastructure for EVs

The storage system supplies energy as soon as power consumption spikes sharply for a short period. This prevents so-called peak loads, which lead to high capacity charges. Depending on consumption, this often saves several thousand euros per year.

Systems of type are typically 30 kWh to several MWh, depending on company size and use case.

Modern lithium-ion storage systems achieve:

• 8,000 – 15,000 cycles
• Lifespan of 10–15 years

Depending on the region, subsidies may be available, for example:

• Demand response programs
• Subsidies for charging infrastructure
• If applicable, in conjunction with photovoltaic systems, so-called innovation tenders
• Country-specific grants
  (The actual programs must be checked regionally.)

Commercial energy storage systems:

• stabilize the power grid
• enable greater use of renewable energy
• support the development of intelligent energy systems

Yes – many systems offer an optional backup power or emergency power function. However, this must be specifically planned for.

The economic efficiency depends on:

• Load profile of the company
• PV generation
• capacity charges
• Storage capacity

Systems often pay for themselves in 4 to 8 years.

The battery system shuts down automatically and safely disconnects from the grid. In this case, the necessary power is automatically drawn from the public power grid. 

The storage delivers less charging or discharging power; the system automatically throttles the power.

BESS are maintained through regular inspections, software updates, and functional tests.
Typical OPEX costs: approx. 2% from CAPX per year, depending on size and manufacturer.

Create modern systems 6,000 to 12,000 full cycles. It should be noted that well-designed battery storage systems operate within a charge range of 10 to 90 %, and full cycles thus accumulate.  

In many cases yes, especially for outdoor installations or container solutions.

The following factors must be taken into account:

• Fire Safety Requirements
• Ventilation and Temperature Requirements
• Escape routes and safety exits
• Standards such as VDE-AR-N 4105 / 4110

There are various ways and stages involved in insuring a storage system:

• Planning phase:
  • Planning Liability

• Construction phase:
  • Builder's Liability Insurance
  • Erection insurance
  • Transportation Insurance

• Operational phase:
  • Operator Liability
  • Fire and Property Insurance
  • Electronics insurance
  • business interruption insurance