Peak shaving battery storage for demand charge reduction in Russia and Central Asia

What the demand charge is in Russia

On the Russian retail electricity market a consumer chooses a price category. In categories 1 and 2 capacity is not billed separately: its cost is included in the energy price. From category 3 onward metering is hourly and the bill splits into an energy charge and a capacity charge. For consumers with a maximum capacity of 670 kW or more these categories are in practice mandatory.

Billed capacity is not the site maximum. It is the site load during planned peak hours that the system operator sets for every working day of the month, so a single bad hour inside that window sets the charge for the whole month. In categories 4 and 6 a separate network maintenance rate is billed as well, which increases the value of peak reduction.

Demand charge reduction with battery storage

The battery management system knows the planned peak hours and discharges in that window, keeping grid import below a target threshold. Production runs as usual while the meter records lower capacity. The operating modes are described on the peak shaving and demand charge page.

Two kinds of peaks should not be confused. The site peak is the facility own maximum load, for example when equipment starts. The system operator planned hours are the window in which billed capacity is measured, and they do not always coincide with the site peak. Only discharge in the planned hours cuts the capacity charge; shaving the site own peaks helps when the facility hits a contractual or transformer capacity limit.

• Night: the battery charges at the night tariff, the load runs on the grid.
• Planned peak hours: discharge keeps grid import below the threshold.
• Sudden load rise: the battery picks up equipment starts within fractions of a second.
• Grid outage: island mode for critical lines until the grid returns or a genset starts.

Load shifting and other value streams

Capacity charge reduction is the main value stream, but not the only one. The battery also shifts load: it charges in cheap night hours and supplies energy in expensive daytime zones. The wider the time-of-day price spread, the larger this effect.

The battery also carries critical load through short voltage dips that a genset cannot catch, works with on-site solar, and lets a site avoid waiting for grid reinforcement where spare capacity is not available. Backup value is calculated separately, based on the cost of downtime for the specific operation. Payment for primary frequency regulation is not included: as of 10.2026 there is none in Russia.

Data needed for a peak shaving study

An accurate study uses an hourly consumption profile for 12 months. A single month does not show seasonality and does not reveal how often the site peak coincides with the system operator planned hours. The export can usually be obtained from the metering system or the energy retailer.

• Hourly consumption profile for one year.
• Peak and average site load, kW.
• Price category and tariffs under the supply contract.
• Objective: bill reduction, backup, grid connection, own generation.
• Region, site climate and minimum winter temperature.
• Installation location and limits on area and weight.

Sizing power and energy

Battery power is set by how many kilowatts of grid import must be removed in the planned hours. Energy is set by the length of the planned peak window and the depth of reduction, with margins for usable depth of discharge, round-trip efficiency and battery ageing over the study period. Sizing covers every working day of the year, not one average day.

Mid-size plants are typically served by cabinets combined in groups, large sites by containers. The full range is in the cabinet and container line-up.

What drives peak shaving payback in Russia and Central Asia

In a sample calculation for a 2.5 MW / 5 MWh system in Russia, simple payback is about 3 years in price categories 4 and 6 and 4.2 years in category 5; discounted payback is 3.8 and 7.6 years respectively. This is an example as of 10.2026, not a commercial offer. The difference between categories comes from the network maintenance rate.

You can estimate your own site in the battery economics calculator: it runs in the browser, and the default tariffs should be replaced with your own.

• Price category: the effect is higher in categories 4 and 6.
• Share of capacity charge reduction: 50 % for a first estimate, 30 to 70 % range in the calculator.
• Profile shape: a steady daytime load gives a more predictable result.
• Time-of-day tariff spread for load shifting.
• Climate: heating in frost consumes part of the energy.
• Maintenance and battery ageing over the study period.

Kazakhstan and Uzbekistan

In Kazakhstan the battery business case is based on the site contract with the energy supplier, which defines how capacity is paid. For sites in the north and centre of the country, where winter reaches -40 °C, heating or NFPP sodium chemistry is a standard requirement.

In Uzbekistan time-of-day tariffs apply from 22.09.2026 to consumers of 750 kVA and above, so load shifting becomes a source of income. Long summer outages add backup value. A behind-the-meter battery does not require a separate licence. More on the Russia, Kazakhstan and Uzbekistan markets page.