Outdoor 115 kWh sodium cabinets
- Equipment
- 2 NFPP cabinets of 115 kWh
- Result
- continuous outdoor operation since April 2024 and February 2025
Solution
Lower capacity charges and peak shaving
The storage system charges at night and discharges during peak load hours. Billed capacity and the share of expensive energy go down, and during a grid outage the battery carries the critical load.
Key figures
about 3 years
simple payback of a 2.5 MW / 5 MWh system in price categories 4 and 6
example calculationfrom 670 kW
maximum capacity from which capacity is billed in Russia (price categories 3-6)
market rules, 10.202630-125 kW
power of a single cabinet; cabinets are combined into groups
manufacturer dataWhy the bill keeps growing
Capacity charges
Consumers in price categories 3-6 pay for capacity during the system operator's scheduled peak hours. A single peak hour sets the charge for the whole month.
Expensive hours
Energy in the daytime and evening costs more than at night. Production cannot move its shift, but storage can shift consumption.
Short dips
Voltage dips and outages lasting seconds or minutes stop production lines and spoil products. A genset cannot respond to such events in time.
No spare capacity
Production growth hits the connection limit. Storage covers peaks without increasing contracted capacity.
Solution
How it works
The control system charges the storage during cheap hours and discharges it during peak hours, by schedule and by actual load.
- NightThe storage charges at the night tariff while the load is supplied from the grid.
- Scheduled peak hoursThe control system discharges the storage and keeps grid consumption below the set threshold.
- Sudden load increaseThe storage picks up equipment starts within fractions of a second, so the peak never reaches the meter.
- Grid outageThe storage switches to island mode and supplies critical lines until the grid is restored or the genset starts.
- primary source
- backup
- unstable
- not available
Discharging during scheduled peak hours reduces billed capacity.
Which mode delivers the effect
| Mode | How it works | When it applies |
|---|---|---|
| Lower capacity charges | discharge during the system operator's scheduled peak hours | price categories 3-6 in Russia, contracts with capacity charges |
| Load shifting | charge at the night tariff, discharge during expensive hours | time-of-use tariffs, day and night price difference |
| Load peak shaving | covering inrush currents and short peaks | capacity limit under the contract or transformer rating |
| Backup for critical loads | island mode during a grid outage | continuous processes, cold storage warehouses, healthcare |
| On-site solar generation | storing surplus and supplying it in the evening | rooftop solar plant or one next to the site |
Payback periods are an example calculation for a site in Russia with a typical profile. Your payback depends on the load profile, tariff and price category.
Russia
What to take into account in the calculation
Capacity charges go down only if discharge coincides with the scheduled peak hours that the system operator publishes in advance. For price categories 4 and 6 the network maintenance rate is also included in the calculation. We calculate both effects from an hourly profile for a full year, not from a single month.
Projects using this solution
Data from the group's manufacturers and partners as of 10.2026. Customer names are not published.
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
Equipment for enterprises
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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.