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Gmina Sandomierz has issued a Energy Storage Systems Construction contract for the design, permitting, delivery and installation of 388 energy storage systems with hybrid inverters across municipalities in Busko, Pińczów, Staszów and Sandomierz counties. Published on 2nd April 2026, the project stands out for its scale and for the way it extends storage deployment beyond a single locality into a coordinated, multi-county programme.

A multi-county rollout of 388 storage systems

The notice sets out a comprehensive scope. The selected contractor will be responsible for designing each of the 388 systems, obtaining the necessary permits, delivering the equipment and installing it in the participating municipalities. The systems will include hybrid inverters, although the notice does not provide further technical specifications.

The project covers municipalities in four counties: Busko, Pińczów, Staszów and Sandomierz. That geographical spread makes it more ambitious than many earlier municipal energy storage schemes, which have tended to focus on a single area. It also means the winner will have to coordinate works across a wide territory, aligning technical delivery with local administrative processes in each municipality.

From dozens of units to hundreds

In October 2025, Gmina Wojnicz went to market for a smaller scheme: the design, delivery, installation and commissioning of energy storage systems for 38 residential properties, to store electricity from existing photovoltaic installations. Powiat Suski followed later that month with a contract to design and install storage for photovoltaic systems in 100 residential houses and three public utility facilities, as part of a programme aimed at enhancing renewable energy use and environmental quality.

By November 2025, the scale of individual projects was already edging up. Gmina Limanowa sought design, permitting, delivery and installation of 65 energy storage units for existing photovoltaic installations in its area, covering both residential and public buildings. In January 2026, Gmina Ostrów Mazowiecka issued a notice for energy storage systems with hybrid inverters at 124 residential units and nine public utility buildings.

Against that backdrop, the 388 units in the Gmina Sandomierz project mark a clear escalation in ambition. The move from dozens of systems per contract to several hundred suggests municipalities are now confident enough in the technology and delivery models to commission much larger portfolios in a single procurement.

Public buildings, homes and critical services

The recent wave of storage procurements has cut across residential and institutional settings. In November 2025, Gmina Miejska Ciechanów launched a scheme funded by European Funds to design, deliver, install and commission energy storage systems for eight public utility buildings and 162 private buildings, explicitly to enhance renewable energy sources and optimise electricity consumption. Earlier, in October 2025, Gmina Chynów tendered for the design, delivery, installation and commissioning of electric energy storage systems in public utility buildings.

Other municipalities are combining storage with broader renewable upgrades. A contract notice from Gmina Czechowice-Dziedzice, published in October 2025, covers the construction of renewable energy installations with energy storage and heat pumps in public buildings, including comprehensive design, installation and commissioning services. In November 2025, Gmina Strzałkowo went to market for the supply and installation of photovoltaic systems with energy storage and heat pumps for residential buildings across the municipalities of Lądek, Ostrowite and Strzałkowo, including project documentation and modernisation of heating systems.

Critical public services are also moving to on-site generation and storage. The Warmian-Masurian Center for Lung Diseases in Olsztyn issued a contract notice on 14th November 2025 for delivery, installation and commissioning of a photovoltaic system and energy storage, ensuring qualified supervision, documentation and warranties. A Clinical Psychiatric Hospital in Rybnik followed on 1st April 2026 with a tender covering the design, delivery, assembly and commissioning of photovoltaic panels, energy storage systems and an energy management system across multiple hospital buildings. In the transport sector, the municipal transport company in Zawiercie published a notice on 31st December 2025 for photovoltaic systems with energy storage, including necessary documentation, permits and training.

What buyers are asking suppliers to deliver

The Gmina Sandomierz project mirrors many of the features now common across municipal storage procurements. Its scope runs from design and permitting through to delivery and installation, requiring the supplier to manage both technical implementation and the administrative steps needed to bring hundreds of systems into operation.

Other recent notices flesh out what that end-to-end responsibility can entail. In November 2025, Gmina Nowa Sucha sought a contractor to design, permit, deliver and install energy storage systems with hybrid inverters at 56 residential and eight public utility buildings, explicitly including user training and warranty service. A tender from Gmina Opinogóra Górna, published on 7th April 2026, requires preparation of documentation, obtaining necessary permits, conducting legal procedures, installation and commissioning of storage systems for existing photovoltaic installations, together with training and service for users.

Training and documentation also feature prominently in tenders for public buildings. The project in Lipowa, advertised in February 2026, covers the supply and installation of photovoltaic systems and energy storage solutions for several public buildings, along with the required legal documentation and an energy management system. The municipal sports hall project in Cieszyn, published on 19th March 2026, involves construction of a photovoltaic micro-installation with an energy storage system on the hall roof as part of a wider project to improve energy efficiency in municipal units.

Taken together, these notices show that buyers are no longer looking simply for hardware. Typical requirements now bundle several elements:

design of energy storage systems for multiple locations;
preparation of project, legal and permitting documentation;
delivery, installation and commissioning of equipment;
training for users and provision of operating instructions;
warranty obligations and, in some cases, ongoing service support; and
integration with photovoltaic installations, heat pumps or energy management systems where these form part of a wider upgrade.

Against this backdrop, the Gmina Sandomierz contract’s emphasis on design, permitting, delivery and installation of a large fleet of systems indicates that the winning supplier will need the capacity to run a sizeable, multi-site programme rather than a one-off installation.

Implications for local energy strategies

The objectives set out in the various notices are strikingly consistent. The Powiat Suski project frames storage as part of a programme to enhance renewable energy use and environmental quality. The Ciechanów scheme is designed to enhance renewable energy sources and optimise electricity consumption, while the community energy partnership programme in Świebodzice focuses on improving the energy efficiency of public utility buildings through new photovoltaic and storage installations.

Several municipalities are also treating storage as one component within broader renewable and efficiency packages. Contracts in Czechowice-Dziedzice, Strzałkowo and Koło pair photovoltaic installations with energy storage and, in many cases, heat pumps, often alongside modernisation of heating systems or wider infrastructure upgrades. The project at the municipal company in Krosno, advertised on 13th January 2026, goes further by building electrical energy storage systems at two locations specifically to balance electrical energy within the company and within the Krosno Energy Cluster.

Although the Gmina Sandomierz notice does not spell out its wider policy aims, its scale and multi-county reach place it firmly within this pattern: storage deployed as a tool to strengthen local energy systems, make better use of distributed generation and improve the performance of public-sector buildings and services.

What to watch next

The cluster of notices published between October 2025 and April 2026 suggests that energy storage has moved from pilot territory into routine public-sector investment. The Gmina Sandomierz contract, with its 388 systems and cross-county footprint, will be an important test of the market’s capacity to deliver large numbers of installations under a single procurement.

Other schemes show that funding sources and governance models can vary. Ciechanów is drawing on European Funds for its mixed public-private programme, while the Krosno project is tied to the operation of a local energy cluster. Future contract notices and contract awards will indicate whether more municipalities choose to scale up in the way Sandomierz has done, bundling many sites into a single storage rollout.

For suppliers active in energy storage and distributed renewables, the message from these tenders is that municipal and regional buyers are now procuring full portfolios of systems, not just isolated installations. The Gmina Sandomierz project is a clear sign that storage has become an increasingly standard part of local energy investment plans.