Grid Connection in Poland: Rules, Timelines, Costs for Renewable and BESS projects

Summary

• Grid operator: PSE - Polskie Sieci Elektroenergetyczne - (Transmission); PGE Dystrybucja, Tauron Dystrybucja, Enea Operator, Energa-Operator + 180 DSOs - (Distribution)
• Regulator: URE (Urząd Regulacji Energetyki) - Energy Regulatory Office
• Connection Status: Saturated / Reforming
• Timeline: Connection conditions are now only valid for 1 year.
• Security Deposit: Advance payment PLN 60/kW (cap PLN 6m) + collateral PLN 30–60/kW (cap PLN 12m)
• BESS Rules: Same as the generation. 90 GW of storage connection conditions issued

Voltage Threshold

Transmission: (≥220 kV)

Distribution: (≤110 kV)

1. Market snapshot

Poland is one of Europe's most grid constrained markets. Connection requests declined, in 2024 alone, reached roughly 74 GW of potential capacity. These declined requests exceed Poland’s entire total installed system capacity of roughly 72 GW. The total capacity of rejected grid connection applications rose from 6.2 GW to 107 GW in 2025. 

Grid connection conditions have been issued for approximately 240 GW though many of these projects are inactive, freezing available capacity. This mismatch between demand and grid capacity is the driving feature of the landmark 2026 Grid Act and reform. 

16 October, 2026, is a key statutory deadline under the amended Energy Law for legacy grid connection holders to commit financially or forfeit grid rights. This mechanism eliminates speculative, non-viable projects currently hoarding transmission capacity. 

2. Grid Providers

• Transmission (TSO): run by state owned Polskie Sieci Elektroenergetyczne SA (PSE) at 220 kV and 400 kV.
• Distribution (DSO): Primarily PGE Dystrybucja, Tauron Dystrybucja, Enea Operator, and Energa-Operator - manage the regional medium and low-voltage networks, and most projects connect to a DSO. Poland has 188 DSOs in total, though the four large groups dominate. Distribution voltage runs at 110 kV (high), ~15 kV (medium), and 230/400 V (low).
• Regulator: URE (Energy Regulatory Office). 

Most utility scale renewable and BESS projects connect to the relevant regional DSO.

3. Connection status and the queue

Severely capacity-constrained. Currently undergoing its most significant connection reform in over a decade. The core problem is a flood of applications - much of it speculative - against a traditional and under-invested network. In 2022, URE recorded refusals to connect for planned plants totalling more than 51 GW; the number of refusals has deepened each year. 

This is commonly attributed to old infrastructure: much of the network dates from the communist era and is aging, so countries like Poland, Bulgaria, the Czech Republic and Slovakia face significant barriers that practically prevent new capacity from being connected. 

Curtailment is rising sharply as a result. In the seven days ending 21 April 2025, PSE curtailed 77.5 GWh of renewable generation - more than the total curtailment for all of 2023.

"Grid Act" (UC84), is the response to this as an amendment to the Energy Law. Poland adopted the Energy Law amendment on 13 March 2026, and the Act was officially announced on 15 April 2026, aiming to provide a long-overdue response to the speculative blocking of connection capacity. Its goal is to unlock frozen capacity by forcing out inactive "zombie" projects through stronger financial commitments and hard project milestones (detailed below). Separately, from 1 August 2025 the TSO adopted a new methodology for reviewing connection applications to better manage the large number of pending and overlapping applications.

Cable pooling - In 2023, the Energy Law introduced cable pooling - a mechanism that lets two or more renewable energy installations share a single grid connection - in order to make better use of available connection capacity. It can combine different types of installations (e.g. wind + PV + hydro) or the same-type RES (Renewable Energy Sources).

• Same‑type RES (e.g., PV + PV)
• Different types (e.g., wind + PV + hydro + biogas)

Source: URE (April 2026).

4. Application Process

Transmission (PSE): PSE handles applications for projects through grid connection agreements and subsequently issuance of grid connection conditions that set out the technical conditions of connecting.

Distribution: Submit application to relevant DSO. The DSO assesses application and network capacity to accommodate new load. If feasible it issues connection conditions - process can take several months

Validity period of connection conditions reduced from two years to only one year, developers must move projects more quickly to keep their capacity. 

• Connection timeframe: 1-2 years for all projects (Subject to grid availability).

The reform compresses timelines and tightens transparency. The validity period of connection conditions was reduced from two years to only one year, so developers must move projects forward more quickly to keep their capacity. 

Procedural deadlines were introduced: operators have 60 days to request completion of an application, and the process is to be handled electronically, with the removal of the obligation to attach a zoning decision. The Act also introduces two new grid connection agreement types: flexible and configurable, allowing connection in areas where full firm capacity is not yet available

5. Costs and financial requirements

• Application review fee: PLN 1/kW, cap PLN 100,000, per connection point
• Advance Payment (towards connection fee): PLN 60/kW (PLN 60,000/MW)
• Collateral (securing connection agreement): PLN 30/kW up to 100 MW; PLN 60/kW above 100 MW; cap PLN 12,000,000

The collateral takes the form of a deposit, a bank guarantee, or a corporate guarantee from a suitably rated entity and must be provided within 14 days concluding the connection agreement.

6. Timelines

• Operator request to complete application: 60 days
• Validity of connection conditions: 1 year (reduced from 2)
• Construction permit milestone - solar & BESS: 24 months from signing connection agreement
• Construction permit milestone - wind & biogas: up to 36 months

7. Battery storage (BESS) rules

BESS is included within the standard generation connection process. Storage is a large part of the Polish queue - of the 240 GW of connection conditions issued around 90 GW is for energy storage facilities.

However the new flexible connection agreements are expected to benefit storage as developers will gain more streamlined access to the grid including in areas where full network capacity is not yet available. Subsequently, BESS, which can absorb surplus and relieve congestion, is strategically valuable in a constrained grid.

8. Recent reforms and what’s next

• 2020: Rejected connection applications total 6.2 GW (baseline)
• Jan 2025: PSE publishes Development Plan 2025–2034 (~€15bn / PLN 64bn investment)
• Aug 2025: New TSO methodology for reviewing connection applications adopted
• Mar 2026: Energy Law amendment ("Grid Act" / UC84) adopted by Parliament
• Apr 2026: Grid Act officially announced
• *Oct 2026: Key transitional deadline for existing connection-condition holders

9. Risk factors

• Grid access is now materially more capital-intensive. The stacked application fee, doubled advance payment, and forfeitable collateral require significant capital committed early, before construction - a real balance-sheet consideration on large projects.
• Refusal risk remains very high. With rejected applications reaching 107 GW in 2025 against a ~72 GW system, securing capacity at a given node is far from guaranteed.
• Hard milestones with automatic expiry - Missing the 24-month (solar/BESS) or 36-month (wind) construction-permit milestone can automatically terminate the agreement and send capacity to auction.
• Shortened validity - One-year connection conditions (down from two) leave far less room for delay.
• Curtailment is rising fast, cutting effective revenue for renewable assets in congested areas.

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This country profile forms part of our wider guide to grid connection across Europe, which compares regulatory status, connection costs, security requirements and timelines across major European markets.

See related markets such as Sweden, United Kingdom, Italy

Sources:

https://think.ing.com/articles/can-polands-power-grid-operator-accelerate-energy-transition/

https://www.iea.org/articles/poland-electricity-security-policy

https://www.arena-energy.pl/en/przylaczenie-do-sieci.html

https://www.schoenherr.eu/content/regulatory-summary-of-the-first-year-of-cable-pooling-in-poland