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ENEA Nowa Energia sp. z o.o. has gone to market for components for a Battery Energy Storage System (BESS) with a target usable capacity of 840 MWh, backed by a commitment to purchase at least 600 MWh within 24 months. The scale and structure of the order underline how quickly grid-scale storage is moving from pilot projects to core infrastructure across Europe.

A large order focused on components

On 24th April 2026, ENEA Nowa Energia sp. z o.o. published a contract notice for the delivery of components for a Battery Energy Storage System (BESS) with a target usable capacity of 840 MWh. The buyer undertakes to purchase at least 600 MWh of that capacity within 24 months, setting a sizeable minimum volume for suppliers.

The summary makes clear that this is a supply contract for system components rather than a full engineering, procurement and construction package. Design, installation, grid connection and commissioning are not described in the published scope, suggesting these aspects will be handled through separate arrangements.

Even without power rating or configuration details, a usable capacity of 840 MWh places the project firmly in the grid-scale category. The guaranteed 600 MWh within two years gives the supplier a clear baseline, while leaving room for the buyer to expand the installation towards the higher target as its needs and wider system plans permit.

Structuring the contract around a guaranteed minimum and a higher target is notable in a market where many public buyers still procure one-off, site-specific systems. Here, the buyer signals both firm intent to build substantial storage capacity and a desire for flexibility over the final delivered volume.

• Supply of components for a Battery Energy Storage System
• Target usable capacity: 840 MWh
• Guaranteed minimum to be purchased: 600 MWh within 24 months
• Scope framed as a supply-only package; other works are not covered in the notice summary

The public summary does not spell out technical specifications, performance guarantees or commercial terms. Those details, along with any phasing of deliveries, will sit in the full tender documentation, but even the headline figures give a strong sense of the scale now being contemplated.

How it compares with other storage tenders

Across recent public procurements, most battery projects remain far smaller. On 14th November 2025, Omgevingsdienst Drenthe launched an energy storage systems tender for a system with four battery packs totalling 1,040 kWh (around 1.04 MWh) of capacity, including maintenance. That is two orders of magnitude below the capacity ENEA Nowa Energia is now targeting.

On 23rd December 2025, EDF power solutions issued an EPC consultation for the Variscourt BESS, specifying a system of about 95 MWh with 47.5 MW of power and a long-term operation and maintenance package. In capacity terms, that places the ENEA Nowa Energia requirement at almost nine times the declared size of the Variscourt project.

Several other buyers have gone to market for integrated BESS delivery. Teplárny Brno, a.s. published a Battery Energy Storage System Project on 25th November 2025 covering completion of a storage system with defined output and capacity, together with the development and approval of all documentation. Lippeverband, in a notice dated 27th February 2026, seeks the turnkey delivery and installation of a complete battery storage system, including power electronics, low-voltage connections and integration with central control technology.

Market models vary as much as project sizes. The Danish company Verdo, for example, is procuring a Battery Energy Storage System in a March 2026 tender to provide backup power, strengthen grid support and optimise energy costs at Verdo Produktion A/S. By contrast, Municipiul Craiova’s April 2026 electric energy storage system project focuses on designing and executing a battery installation for a photovoltaic power plant, in order to enhance renewable integration and streamline plant operations.

Urban authorities are also commissioning substantial systems. On 10th April 2026, Miasto Białystok advertised an electricity storage facility installation that combines supply and installation of a storage plant with a monitoring and control system, medium- and low-voltage works and transformer station construction. Here, batteries are procured as one element within a broader package of civil engineering and control infrastructure.

Against that backdrop, ENEA Nowa Energia’s decision to centre this tender on components alone stands out. It points to a separation between hardware supply and the downstream tasks of engineering, construction, integration and long-term operation, leaving room for separate procurement exercises focused on those activities.

Storage embedded in wider energy strategies

Many recent notices show battery storage being embedded in renewable energy and efficiency projects rather than procured in isolation. Gmina Nowosolna’s renewable energy installations contract, published on 5th March 2026, combines delivery, installation and commissioning of photovoltaic panels with energy storage systems, plus user training and ecological documentation for municipal facilities. On 16th April 2026, Miasto Suwałki went further, seeking photovoltaic micro-installations with energy storage for 18 public utility buildings, alongside technical assessments, design documentation, integration with existing systems and annual inspections.

Transport-focused bodies are taking a similar approach. Zakład Komunikacji Miejskiej Zawiercie sp. z o.o. is procuring photovoltaic systems with energy storage for a municipal transport company, in a notice dated 31st December 2025 that covers design, supply, installation, permitting and training. In a January 2026 contract, free heating s.r.o. is buying 11 electric-vehicle charging stations and a battery storage system, again bundling installation, documentation and expert supervision into a single package.

Regional and national bodies are meanwhile positioning storage within wider transition programmes. Regione Autonoma della Sardegna’s 17th December 2025 Battery Energy Storage System procurement forms part of the REFUEL Project under the Just Transition Fund in Italy, marrying supply and installation of a BESS to a dedicated funding stream. On 12th December 2025, the Centre National d'Etudes Spatiales issued a consultation on integrating a Battery Energy Storage System at the Guiana Space Centre, focused on defining technical and functional requirements before moving to full procurement.

Some utilities are choosing a multi-site, long-term framework style. HOLDING SLOVENSKE ELEKTRARNE d.o.o. published a tender on 17th March 2026 for construction of battery systems across the HSE group, covering design, supply, installation, commissioning and maintenance of outdoor storage installations. Actual orders will depend on the contracting authority’s needs, indicating a flexible approach to rolling out capacity over time. A similar systems view is visible in Technologie hlavního města Prahy, a.s.’s 17th March 2026 project for PV plant construction with battery storage and dispatch control, where the contract spans design, delivery, installation, commissioning and the necessary documentation and permits.

Alongside these storage-centric schemes, traditional electricity-supply tenders remain a staple of public-sector procurement. Województwo Pomorskie’s electricity supply contracts notice from 28th October 2025, the Świętokrzyskie region’s electricity supply for a purchasing group published on 11th December 2025, Univerzita J. Selyeho’s 24th April 2026 electric energy supply tender and the central purchasing body’s 25th March 2026 electricity supply contract for state administration units all focus on delivering power to consumption points. Taken together with the new wave of storage projects, they suggest that, for now, batteries are being added to the system rather than replacing conventional supply arrangements.

What to watch next

ENEA Nowa Energia’s 840 MWh target stands out against a backdrop of mostly smaller public-sector BESS schemes, and its guaranteed 600 MWh order over 24 months offers suppliers a degree of volume certainty that many projects lack. For manufacturers of battery modules, racks and associated components, this is a signal that large-scale, multi-hundred-MWh procurement is now firmly on the agenda.

At the same time, comparison with other notices shows that buyers are experimenting with different contractual approaches: some, like EDF power solutions at Variscourt or Lippeverband in its turnkey storage tender, bundle engineering, construction and long-term operation; others, such as HOLDING SLOVENSKE ELEKTRARNE, allow capacity to be drawn down as needs evolve. ENEA Nowa Energia has opted to focus this contract on hardware supply, leaving open how installation, grid integration and operational services will be sourced.

Upcoming procurement activity around this and similar projects will indicate whether component-only tenders become more common at the largest scales, and how public buyers balance the benefits of integrated contracts against the flexibility of separating hardware from works and services. For suppliers across the battery value chain, the message from these notices is clear: storage is moving rapidly from niche pilot to mainstream part of energy and infrastructure planning.

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