Large grid-scale sodium project
- Equipment
- sodium containers of the same class as the OS Power 2.4 MWh sodium container
- Result
- operation as part of the power system
Solution
Grid-scale storage for power systems and renewables
Lithium and sodium containers up to 5 MWh for grid companies, solar and wind plants. Output smoothing, shifting energy to the evening, primary frequency control and capacity reserve in the grid node.
Key figures
5,016 kWh
energy of the LFP container, 2.5 MW power (0.5P)
manufacturer data2,396 kWh
NFPP sodium container, 1.25 MW power with PCS
manufacturer dataIEC 104, IEC 61850
communication protocols with dispatch systems
manufacturer dataWhat is required from grid-scale storage
Variable renewable output
Solar and wind output changes within minutes, while the grid requires a smooth schedule and a limited ramp rate.
Evening peak
The sun delivers energy during the day, but consumption rises in the evening. Without storage the surplus is curtailed.
Frequency control
Since 2026 grid-scale storage in Russia participates in general primary frequency control.
Weak nodes
Overloaded substations and lines need a capacity reserve in the node without building new networks.
Solution
How it works
Containers with power converters and a control system operate on the dispatcher's schedule and on frequency control commands.
- Charging from the plant or gridSurplus solar or wind output and night-time energy charge the containers.
- SmoothingThe storage compensates fast output fluctuations and limits the ramp rate.
- Scheduled dispatchEnergy is delivered during the evening peak or on the schedule set by the dispatcher.
- Frequency controlWhen frequency deviates, the storage changes its power within fractions of a second along the set droop characteristic.
- primary source
- backup
- unstable
- not available
The storage delivers energy on schedule and participates in frequency control.
Tasks and modes
| Task | Storage mode | Duration |
|---|---|---|
| Renewable output smoothing | compensating fluctuations, limiting the ramp rate | seconds and minutes |
| Energy shifting | charging during the day, delivering in the evening | 2-4 hours |
| Primary frequency control | power change in response to frequency deviation | seconds and minutes |
| Capacity reserve in the node | delivery during overload or line outage | up to several hours |
| Black start | starting an isolated section from the storage | per project |
Participation in frequency control and communication protocols are agreed with the system operator and the grid company for each project. As of 10.2026 there is no separate payment for general primary frequency control in Russia, so this mode is not included in project economics.
Sodium in the grid
When grid-scale storage should be NFPP
A sodium container in an insulated version with heating is chosen for sites with severe winters, for facilities close to residential areas and where cycle life under frequent short control cycles matters. For daily energy shifting at the lowest cost per kilowatt-hour, LFP is chosen more often. We compare both for your operating mode in the calculation.
Projects using this solution
Data from the group's manufacturers and partners as of 10.2026. Customer names are not published.
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Learn moreRequest
Tell us about your site
Peak and average load, hourly load profile for a year (if available), tariff and price category, site climate and the task: lower electricity costs, backup, grid connection or on-site generation. We will reply with a configuration, an indicative payback and a lead time.