Our Promise
Battery Storage for Utilities, Grid Operators, and Energy Providers
Grid congestion and limited connection capacity increasingly present technical, economic, and regulatory challenges for the energy sector. Battery storage offers a flexible, economical, and future-proof solution to utilize existing grid infrastructure more efficiently and unlock new economic potential.
Our battery storage solutions combine grid-supportive operation, commercial flexibility marketing, and flexible grid connection models according to § 17 para. 2b EnWG, without costly grid expansion.
Typical utilization of a distribution grid (HV/MV)
ESTABLISHED PROJECT PARTNER
Reference Projects and Experience
FBS-Systems is the market leader in flexible grid connections according to § 17 para. 2b EnWG
Already 4 different FCAs concluded with grid operators in different grid situations (load/feed-in dominated).
37 MW of battery storage grid-neutral or grid-supportive through an FCA solution from FBS under construction.
Standardized and proven contract frameworks for utilities and energy providers.
The reference project Balzhausen was part of the feed-in socket of LEW Verteilnetz (LVN), a practical model for the flexible integration of feed-in systems, as also reported by pv magazine:
Image source: StMWi / F. Wachtveitl
Flexible Grid Connection Models According to § 17 Para. 2b EnWG
A key lever for the integration of battery storage is the flexible grid connection according to § 17 para. 2b EnWG. These connection models enable the operation of storage systems even with limited grid capacity, without costly grid expansion.
Instead of permanent expansion measures, the following are used:
- temporary restrictions
- intelligent operating modes
- flexible operating models
adapted to load- or feed-in-dominated grid situations.
For these situations, the legislator provided a remedy in spring 2025. With § 17 para. 2b EnWG, it provides project developers and utilities with a powerful tool.
How Battery Storage Works in Grid Operation and Energy Supply
Reducing Grid Congestion Without Grid Expansion
A key advantage of battery storage for grid operators and utilities is the ability to utilize existing grids more efficiently. Through targeted storage and time-shifted feed-in, overloads are avoided before they occur.
Battery storage enables:
- grid-supportive relief at local congestion points
- intermediate storage of solar and wind peaks
- smoothing of load peaks from industry and commerce
- reduction of redispatch measures
- higher supply security at lower grid operating costs
Co-Ownership
Utilities & FBS-Systems as Partners
Optional grid-supportive partition for local congestion (consumption and feed-in) or intermediate storage of own solar generators.
Grid-neutral and commercially marketed partition with attractive returns.
Keep value creation local. Of course, FBS also offers partnership models for utilities, grid operators, or energy providers. We are happy to actively take the leadership role as majority owner to keep processes lean.
Example of a 7.5 MW storage system:
Can also be connected to different cable systems in the grid area.
This way, the battery storage combines grid stabilization and attractive revenue optimization in one system.
Possible ownership structures 7.5 MW storage system
With 4.5 MW grid-neutral and 3 MW grid-supportive
Attractive Returns Through Partnership
The energy provider rents an optional grid-neutral partition as a co-shareholder of the battery storage special purpose entity. Alternatively, to cover consumption peaks of local industry.
The energy provider participates in attractive returns from flexibility marketing of the grid-neutral partition.
Illustrative representation -
Impact on battery storage operation
Outlook: Reducing distribution grid charges and smoothing grid load peaks with battery storage.
In addition to technical grid relief, battery storage offers significant economic advantages for energy providers and utilities. By reducing load and consumption peaks, grid charges decrease noticeably compared to the upstream grid operator and free grid connection capacity increases locally.
Distribution Grid Peak Shaving
BESS intercepts load peaks and ensures a reduction in grid charges
Example
- In a load profile, power increases from 6:00 PM for 45 minutes from 39 MW to 43 MW, then drops to 41 MW and falls below 39 MW again after another 75 minutes
- The upstream grid operator calculates the capacity price at €140/kW per year based on the highest quarter-hour
Without battery storage
- Highest peak load = 43 MW Capacity costs = 43,000 kW * €140/kW = €6.02 million p.a.
With battery storage (peak shaving)
- A BESS supplies power during peak load times (3 MWh + 2.5 MWh = 5.5 MWh) and reduces peak load from 43 MW to 39 MW
- New capacity costs = 39,000 kW * €140/kW = €5.46 million p.a.
Grid charge savings
- €560,000 per year
Battery Storage for Your Use Case – Start a Non-Binding Conversation
Are you a utility, energy provider, or grid operator looking for grid infrastructure that relieves you? Battery storage with flexible grid connection models according to § 17 para. 2b EnWG offers a future-proof alternative to conventional grid expansion.
We would be happy to analyze your grid and supply situation together and demonstrate how battery storage can be deployed in a technically and economically viable manner.
Take advantage of the opportunity for a non-binding exchange with our expert team.
We look forward to meeting you
Why do BESS make sense for utilities?
Utilities combine grid operation, energy supply, and generation. Battery storage acts as a central infrastructure asset that connects grid stabilization and economic viability.
This makes battery storage a high-yield investment for utilities and a strategic instrument to address increasing regulatory, technical, and economic requirements in the long term.
How can intelligent, flexible solutions avoid local grid congestion caused by growing load peaks?
What are the advantages of battery storage for utilities?
Battery storage enables utilities to reduce grid congestion, lower grid charges, and market flexibility economically by connecting grid operation and energy supply in an integrated system.
Grid-supportive operating modes relieve local congestion, while grid-neutral storage portions can be used for revenue optimization. Integrated utilities particularly benefit from this dual function.
How will battery storage help reduce grid charges in the future?
Battery storage can reduce grid charges by reducing load and consumption peaks, thereby decreasing maximum capacity utilization from the upstream grid operator.
Targeted peak shaving in particular can significantly reduce grid charges without compromising supply security.
Currently, there is no specific regulatory framework for this.
What does a flexible grid connection according to § 17 para. 2b EnWG mean?
A flexible grid connection according to § 17 para. 2b EnWG allows the connection of battery storage even with limited grid capacity by temporarily limiting feed-in or withdrawal capacity statically or dynamically.
In addition, intelligent operating modes and contractually regulated restrictions are used that enable grid-neutral or grid-supportive operation. This allows battery storage to be integrated into existing grids without costly grid expansion.
Can battery storage be used for grid support and economic purposes simultaneously?
Battery storage can be used simultaneously for grid support and economic purposes by dividing it into grid-supportive and grid-neutral storage partitions and controlling them intelligently.
This allows grid requirements to be met while simultaneously generating revenue from flexibility marketing.