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MVM Démász Electricity Network Ltd. has launched a competition to deliver the grid connections and network upgrades required for three electricity storage units in Orgovány and Bugac. The Network Development Projects notice, published in October 2025, sets out works across medium-voltage switching, transformer installations, protection, metering, and new cable and overhead line sections. The buyer points bidders to the procurement and technical documents for full details. No budget or delivery schedule is stated in the notice.

What will be built

The scope covers three lots, each tied to a specific site and storage unit rating:

• Orgovány I. (1 MW/2 MWh) – Works on plot 822/2 include installation of one KÖF ring network switch control cabinet with remote GPRS communication; one 22/0.4 kV 1600 kVA transformer; one 20 kV ring network switch with protection relay (one line, one branching); one BHTR 11–22 kV/1600 kVA, remotely operable 3-section 20 kV ring network switch device; one 2500 A custom low-voltage distribution device; one KÖF metering cell; protection against island operation with power direction functions; and about 148 metres of 240 mm² KÖF ground cable.
• Orgovány II. sports field (2 MW/4 MWh) – On plot 979/3, the plan doubles key equipment to match the higher rating: two KÖF ring network switch control cabinets with remote GPRS communication; two 22/0.4 kV 1600 kVA transformers; two 20 kV ring network switches with protection relays (one line, one branching each); two BHTR 11–22 kV/1600 kVA, remotely operable 3-section 20 kV ring network switch devices; two custom 2500 A low-voltage distribution devices; two KÖF metering cells; protection against island operation with power direction functions; and around 187 metres of 240 mm² KÖF ground cable.
• Bugac (2 MW/4 MWh) – On plot 0316/16 in the outskirts of Bugac, the package includes construction of a V 12-4550 fire-galvanised metal pole with a weight base; one KÖF ring network switch control cabinet with remote GPRS communication; two 22/0.4 kV 1600 kVA TIER2 transformers; one 20 kV ring network switch with protection relay (one line, one branching) and one 20 kV ring network switch with protection relay (two lines, one branching); two BHTR 11–22 kV/1600 kVA, remotely operable 3-section 20 kV ring network switch devices; two custom 2500 A low-voltage distribution devices; protection against island operation with power direction functions; one KÖF metering cell; about 4.66 km of KÖF Aludur/AASC wire (95 mm², 1x3 strands); and roughly 132.5 metres of 240 mm² KÖF ground cable.

Across all three sites, the designs point to a consistent set of building blocks: ring network switchgear at 20 kV with protection relays, 22/0.4 kV transformers at 1.6 MVA per unit, custom 2500 A low-voltage distribution, metering cells, anti-islanding protection with power direction functions, and communications via GPRS for remote operation. The Bugac lot also features a new metal pole and a longer overhead medium-voltage conductor run, while the Orgovány sites emphasise underground medium-voltage cable sections.

Scope and delivery

The buyer seeks complete execution of the works specified in the implementation design documents. That includes electrical and related construction tasks, installation and commissioning of switchgear and transformers, deployment of protection and metering, and the laying or stringing of the stated cable and conductor lengths. Remote operation capability is specified for ring network switch devices, and each site includes islanding protection with power direction functions.

The notice does not give contract value, timeframe, or phasing. It also does not identify the storage unit suppliers or owners beyond stating that the works are for electricity storage units at the listed plots. The core requirement is clear: create compliant network connections and the supporting medium-voltage and low-voltage infrastructure so that each storage unit can be integrated into the local network.

How this fits wider network activity

The plan aligns with a steady flow of Hungarian distribution network procurements focused on connections and grid reinforcement. Several recent notices show the same pattern: DSOs commissioning switchgear, transformer, protection and cable works to link new assets and strengthen local networks.

• In November 2022, E.ON Dél-dunántúli Áramhálózati Zrt. tendered a 132 kV ground cable and optical connection to supply a 132/22 kV substation for “Battery Factory I” in Iváncsa, including about 0.57 km of high-voltage cable and optical networking along the route. That contract focused on the higher-voltage feed that underpins downstream distribution works (Construction work for electricity power lines).
• In June 2022, ELMŰ Hálózati Kft. sought contractors for a broad programme of distribution and street-lighting network installation, reconstruction, maintenance and fault response in the supply area of ÉMÁSZ, with works spanning passive network elements and telecommunications routes (Electricity supply installations).
• In February 2024, MVM Émász Áramhálózati Kft. procured design services for medium- and low-voltage distribution networks, including lines, cable networks, transformer stations and consumer connectors across its service area. That design pipeline supports later build contracts like the one now out from MVM Démász (Distribution Network Design KM).
• In April 2025, E.ON Észak-dunántúli Áramhálózati Zrt. went to market for consumer connection services covering low-voltage cable and overhead line links, live working and meter installation for direct measurement up to 3x80 A across sectors. That shows ongoing investment in end-user connections alongside medium-voltage upgrades (Consumer Connection Services).

Taken together, these notices highlight coordinated activity at multiple voltage levels: high-voltage feeds to major substations; medium-voltage switching, protection and transformer works to serve new assets such as electricity storage units; and low-voltage connections for consumers. The MVM Démász package sits in the middle of that stack, focusing on the 20 kV environment and the interface between the storage units and the distribution grid.

Technical notes from the tender

• Remote operation and monitoring: each site specifies ring network switch control cabinets with GPRS communication and remotely operable 20 kV switch devices.
• Protection and metering: all lots include islanding protection with power direction functions and dedicated KÖF metering cells.
• MV and LV integration: new 22/0.4 kV transformers at 1600 kVA link the 20 kV network to custom 2500 A low-voltage distribution assemblies.
• Line works: Orgovány sites include new medium-voltage ground cables (circa 148 m and 187 m), while Bugac combines cable with about 4.66 km of medium-voltage overhead conductor on a new metal pole.

The documents also signal standardisation across sites, which can simplify delivery and operations once the units are in service. Detailed quantities and execution methods are reserved for the procurement documents and the technical description.

Outlook

Watch for contract award details and any follow-on works for commissioning and energisation. Given the consistent kit across lots and the inclusion of remote operation and anti-islanding functions, delivery should hinge on timely equipment supply and network access. Further notices may reveal additional storage connections or related medium-voltage upgrades if these three sites proceed on schedule.

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