E-buses, BESS storage, charging infrastructure and certified HV battery services from a European network
YES-EU Switzerland AG
Zug · Engelberg · Oslo · Frankfurt am Main · Torino · Collesalvetti · Stockholm · Gothenburg · Motala · Brecht · Skive · Slangerup · Lyon · St Quentin Fallavier · Selfoss · Reykjavík · BirminghamNew on Amplifa
About YES-EU
YES-EU is a Swiss-rooted energy company originating from Icelandic bus manufacturing in 1969. The company supplies e-buses, minibuses, coaches and heavy commercial vehicles, battery storage for home, commercial and grid applications, as well as DC fast-charging infrastructure including planning, installation and maintenance. A core business is battery service: As the official NING Service Partner of CATL, YES-EU repairs high-voltage traction batteries at component and module level, performs BMS diagnostics, insulation tests and thermal analyses, rebuilds packs, matches and balances cells and certifies their condition (SoH). In addition, the company offers battery refurbishment, second-life utilization, EU Battery Passport services, OEM spare parts and ADR-compliant battery logistics. Customers include fleet operators, leasing and insurance companies, OEMs as well as municipalities from e-mobility, rail transport, marine and energy storage. With around 300 employees, more than 115 certified high-voltage specialists and over 1,800 completed battery orders, YES-EU operates from Zug in 15 European countries.
- Site
- Zug
- Processes
- Component- and module-level battery repair (HV traction batteries), BMS diagnostics, insulation testing and thermal analysis, Pack rebuild, cell matching and balancing, Performance validation and State-of-Health (SoH) testing/certification, Battery refurbishment and second-life utilization, E-bus and BESS assembly, Installation and commissioning of charging infrastructure (DC fast chargers), Engineering and diagnostics for high-voltage systems and battery architecture
- Materials
- Lithium-ion battery modules, HV contactors & interlocks
- Certificates
- ISO 9001:2015, ISO 14001:2015, ISO 45001:2018
- Founded
- 1969
- Employees
- ~300
- Industries
- E-mobility (buses, trucks), Energy storage (BESS), Charging infrastructure, Rail transport, Marine, Fleet operators/insurance companies
- 01
Engineering & Diagnostics
- 02
BMS diagnostics, insulation testing, thermal analysis
- 03
Component- and module-level repair / pack rebuild
- 04
SoH testing and certification
- 05
Battery refurbishment and second life
- 06
ADR-compliant logistics
- 07
Assembly (e-bus/BESS, Livorno from 2026)
- 08
Maintenance and spare parts supply
Technologies & Processes
Lithium-ion battery modules
Repair and replacement at module and component level in HV traction batteries.
HV contactors & interlocks
Replacement and repair of high-voltage contactors, interlocks and cooling systems.
Locations
Zug
CHHQ YES-EU Group AG / Switzerland AG
Oslo
NONorway HQ, NING Battery Service Center
- 10,000 m² battery service center
- 6,500 m² battery workshop
Collesalvetti
ITSite, assembly Livorno from 2026
- 7,000 m² e-bus/BESS assembly plant
Frankfurt am Main
DEYES-EU Germany GmbH
Engelberg
CHFounding seat of Group AG
Services & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Component- and module-level battery repair (HV traction batteries)Assembly | – | – | – | – | Lithium-ion battery modules, HV contactors |
| BMS diagnostics, insulation testing and thermal analysisTesting | – | – | – | – | – |
| Pack rebuild, cell matching and balancingAssembly | – | – | – | – | Lithium-ion battery cells |
| Performance validation and State-of-Health (SoH) testing/certificationTesting | – | – | – | – | – |
| Battery refurbishment and second-life utilizationAssembly | – | – | – | – | – |
| E-bus and BESS assemblyAssembly | – | – | – | – | – |
| Installation and commissioning of charging infrastructure (DC fast chargers)Assembly | – | – | – | – | – |
| Engineering and diagnostics for high-voltage systems and battery architectureEngineering | – | – | – | – | – |
| OTA software updates for VECU (Vehicle Control Unit)Engineering | – | – | – | – | – |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Battery service center (NING Service Center) | – | 1 | 10,000 m² | 2026 | Oslo, Norway |
| Assembly plant (e-bus and BESS assembly) | – | 1 | 7,000 m² | 2026 | Livorno, Italy |
| Battery service workshop | – | 1 | 6,500 m² | – | Oslo, Norway |
Additional services
Reference customers
Quality & Certification
All battery workshops are certified according to European regulations and operate with 24/7 thermal monitoring, quarantine zones and early fire detection; every repaired battery undergoes a performance test and SoH certification.
| Evidence | Oslo | Zug |
|---|---|---|
| ISO 9001:2015 | ||
| ISO 14001:2015 | ||
| ISO 45001:2018 |
History
- 1969
GT Group begins as a family business with bus manufacturing; first bus based on a Dodge Weapon (1953) of the US Army.
- 1971
First own workshop.
- 1987
Three decades of bus manufacturing in Iceland.
- 2008
Cooperation agreement with partners in China.
- 2012
Strategic shift to e-mobility; first deliveries to Norway.
- 2015
First electric bus in Iceland.
- 2019
Official CATL service partner (Northern Europe).
- 2020
Delivery of 102 e-buses to Bergen.
- 2021
Rail contract with CRRC.
- 2022
Expansion to Germany/Italy; founding of YES-EU Group AG and Switzerland AG in Engelberg; first contract with VREMT.
- 2023
EURISE minibus contract; CATL contract extended to all of Europe.
- 2024
99 buses to Bari; CRRC cooperation for battery trains; modular workshops across Europe.
- 2025
VREMT contract for battery service and spare parts; more than 700 e-buses delivered.
- 2026
Opening of the 10,000 m² NING Service Center in Oslo; planned 7,000 m² assembly in Livorno.