Electricity Storage System with a Capacity up to 50 kW
Steps in the investment process for implementing this system
The implementation of an electricity storage system with a total installed capacity not exceeding 50 kW is significantly simplified. In some cases, it may be necessary to obtain a construction permit.
Step 1 – Micro-system notification / obtaining grid connection conditions
Connection to the grid, under the current legal framework, is a prerequisite not only for the delivery and sale of electricity but also for its storage.
If the capacity of the electricity storage system is less than or equal to the connection capacity of the facility on which it will be installed, a notification of connection to the grid is submitted. The operator connects the system within 30 days from the date of notification.
If the connection capacity of the electricity storage system exceeds the connection capacity of the facility on which it is installed, an application for the determination of grid connection conditions is required.
Step 2 – Notifications, agreements, and construction permits
Depending on the location of the electricity storage system and its capacity (kWh), different construction-related requirements may apply.
Below is a summary of obligations for installing storage systems outside buildings and inside buildings, including construction notifications, fire safety arrangements, and cases where a construction permit is required.
Electricity storage systems outside buildings
- up to 30 kWh – no construction notification and no construction permit required
- 30–300 kWh – construction notification with:
- technical documentation agreed with a fire safety expert,
- site development plan (also fire‑safety‑approved),
- notification to the State Fire Service (PSP) upon completion of construction and before start of operation
- 300–2000 kWh – as above, plus:
- notification to the State Fire Service (PSP) with a plan showing the location of the storage system and information relevant for rescue teams
- above 2000 kWh – construction permit required
Electricity storage systems in or on buildings
- 30–300 kWh – construction notification with fire‑safety‑approved technical documentation, plus notification to the PSP upon completion of construction
- above 300 kWh – construction permit required
Notification of Construction with a Building Design
Notification to the State Fire Service of the completion of construction
Step 3 – Notification on completion of construction works (optional)
Electricity storage systems have not been classified as facilities requiring an occupancy permit. Therefore, the commencement of use of the electricity storage system is possible after notifying the building supervision authority of the completion of construction, provided that this authority does not raise an objection by decision within 14 days from the date of delivery of the notification.
Detailed description of this procedure can be found at:
Notification on Completion of Construction Works