ISEA - M5BAT
ISEA - M5BAT battery storage overview.
M5BAT is RWTH Aachen University's modular battery research facility in Aachen. It combines battery technologies with power electronics and energy-market research. The M5BAT 4.0 programme is renewing parts of the installation and developing its use across several electricity markets.In OperationGermany
At a Glance
Technical capacity
6.3 MWEnergy storage
5.3 MWhStorage duration
1 hoursStorage type
StandaloneOwner
RWTH Aachen UniversityOperator
Data coming soonCountry
GermanyLocation
50.777°, 6.130°Website
Official project pageOwnership
1 record| Share | Organisation | Role | Details | Period |
|---|---|---|---|---|
| Unknown | Operator | RWTH Aachen University is the registered operator of the M5BAT battery storage unit. | Current / not dated |
Organisations
9 recordsOrganisations recorded as working on this asset or its project, and their role.
| Organisation | Role | Details |
|---|---|---|
| Original lead-acid battery technologyEquipment Supply | Exide supplied lead-acid battery technology for the original M5BAT installation. The project chronology records retirement of four lead-acid units on 2 June 2025. | |
| Research programme fundingFunding And Programme | The federal economic affairs ministry funded the M5BAT and EMMUseBat research projects. | |
| Sodium-ion research system shipmentEquipment Supply | Megalion reported shipment of a sodium-ion storage system to Aachen on 4 August 2026 after factory testing. On-site installation and commissioning were to follow. | |
| Connection network operatorGrid Connection | Regionetz is the connection network operator named in the M5BAT unit registration. | |
RWTH Aachen University | Operator | Not set |
| Research lead and system integrationResearch And Monitoring | RWTH Aachen leads M5BAT and provides scientific research, operation and system integration through its participating institutes. | |
| Original battery inverter technologyEquipment Supply | SMA contributed flexible battery inverters to the original M5BAT research installation. | |
| Modular battery technology partnerEquipment Supply | STABL Energy contributes containerised battery storage and modular inverter technology to M5BAT 4.0. | |
| System development and market researchDevelopment And Operation | Uniper contributes plant planning and construction and develops and tests strategies for participation in electricity markets. |
Supplier registration
Contact page onlyHow suppliers get onto this project's radar: its standing register, supplier portal or contact route.
Supplier enquiries can be made through the project's general contact form. The form provides an enquiry route for the research facility.
The M5BAT project website provides a general enquiry form. It is not a supplier register or a package-specific invitation.
SourceChecked 28 Oct 2026
Capacity history
Recorded project capacity figures. Future-dated changes are shown but are not used as current capacity.
| Effective | Capacity type | Capacity | Source |
|---|---|---|---|
| Current | Technical capacity | 6.3 MW | Bundesnetzagentur – MaStR assigned inverter power |