Electrical wiring and fitting work – SV-KWE-261023-002 - TW - Batteriespeicher Zengermoos - Errichtung Batteriespeicher Zengermoos 2026 Tender
In context
This is a contract notice published by a utility covering construction and works. Delivery covers Germany (Europe). It is classified under Energy Storage and Renewable Energy against the sustainability taxonomy rather than matched on keywords.
Stadtwerke München is tendering a turnkey design, supply, construction, integration and commissioning of two grid-connected battery storage systems co-located with existing PV plants, followed by full maintenance. It suits experienced BESS integrators or EPC contractors with utility-scale storage and grid-connection track record, while SMEs would mainly fit as subcontractors.
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About this tender
The procurement covers the turnkey planning, supply, construction, integration, commissioning and documentation of two grid-connected battery energy storage systems (BESS) at two existing photovoltaic (PV) plants owned by the contracting authority, Stadtwerke München GmbH. The storage units are to be built as green-power storage (co-location) with the existing PV plants. Charging the batteries from the public grid is not included in the basic scope, but the installation must allow for a future extension to grid-forming functions under current FNN guidance or a "grey-power storage" mode of operation. The BESS units must be electrically integrated into the existing PV plants and operated together with them through the existing grid connection points at the substation of the grid operator Bayernwerk. Existing components are to be retained and expanded by the contractor, including the grid connection, medium-voltage infrastructure, park control, plant controller (EZA-Regler), telecontrol technology and plant certification. The contractor owes a fully functional, operational and certifiable overall installation (PV+BESS) including all technical, planning and administrative services required for this. After completion and acceptance of the BESS, the contractor will also provide full maintenance (servicing, inspections, fault clearance and repair, spare parts management and warranties) for the BESS. The expected contract duration is not stated on the page.
Key requirements
- ✓Turnkey planning, supply, installation and commissioning of two grid-connected BESS units integrated with existing PV plants
- ✓Integration via existing grid connection point at Bayernwerk substation, with future grid-forming upgrade option (FNN guidelines)
- ✓Full maintenance service for the BESS after acceptance, including spares management and warranties
- ✓Deliver certifiable overall PV+BESS plant with all technical, planning and administrative services
Relevant sectors
About this sector
Energy storage funding spans batteries, long-duration storage, thermal storage and the controls that dispatch them. Research calls focus on chemistry and system cost. Demonstration programmes test grid services, while tenders buy capacity, flexibility and installation contracts. Buyers usually want evidence of safety certification, round-trip efficiency and a credible route to grid connection.
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