Services
Large-Scale Battery Storage.
From Concept to Operation.
wattss Services develops, implements, and operates battery storage projects from 5 MW upwards – across Europe.
Large-scale battery storage projects involve investments, sites, grids, and regulation. wattss supports the entire lifecycle – or enters strategically at specific phases.
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Project Development
Our facilities are located where they are needed: in industrial plants, commercial parks, and grid nodes. They store energy when abundant and deliver it when Europe needs it most urgently. -
Financing
We structure project financing together with wattss Capital: from due diligence to capitalization through a dedicated special purpose vehicle (SPV).
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Implementation (EPC)
From detailed planning through procurement and civil works to technical commissioning – we deliver the storage system turnkey and on schedule.
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Operation and O&M
After commissioning, we assume ongoing operations: maintenance, technical and commercial management, as well as continuous yield optimization.
Projects in Operation
Since 2017, we have accomplished a great deal. From the first groundbreaking in Ingenbohl to the 100 MW project in Arzberg – each of these projects has advanced us further. Here are the facilities we are particularly proud of.
Ikaalinen
13.4 MW
22 MWh
Location
Ikaalinen, Finland
In Operation since
2024
Finland
Ingenbohl 2
8 MW
8 MWh
Location
Ingenbohl, Switzerland
In Operation since
2024
Switzerland
Wunsiedel
100 MW
200 MWh
Location
Arzberg, Germany
In Operation since
2025
Germany
Ingenbohl 1
20 MW
18 MWh
Location
Ingenbohl, Switzerland
In Operation since
2020
Switzerland
Applications
Large-scale battery storage is required at all voltage levels – for grid stabilization, supply security, and market opportunities. Those responsible for energy infrastructure need a reliable partner who understands the entire project cycle. That is what defines wattss Services.
Flexibility for the Energy System.
Large-scale battery storage supports grid stability, enables the integration of renewable energies, and creates additional flexibility in the power system.
Energy Suppliers & Grid Operators
Complex Projects. Reliably Implemented.
wattss Services handles development, implementation, and operation – as an experienced EPC partner from the initial feasibility study to ongoing operations.
City Utilities & Project Developers
Supply Security for Critical Infrastructure.
Battery storage secures critical processes, reduces peak loads, and increases the resilience of energy-intensive sites and public infrastructure.
Industry & Public Sector
Do you have available land, an industrial site, or existing grid connection capacity? Is there a large-scale project that requires an experienced partner?
Submit your inquiry without obligation – we will review the fundamental feasibility confidentially and systematically.