Without sufficient storage capacity, countries will be unable to add renewable energy to their grids at the scale needed.

A battery energy storage solution (BESS) consists of one or more batteries connected to an inverter. The inverter converts direct current (DC) into alternating current (AC), which can be used for various purposes.

A small-scale battery storage system may consist of individual battery units stacked together according to the manufacturer’s design. A medium-sized system typically comes as a cabinet that houses both the inverter and battery modules. Large-scale battery storage systems can take the form of either containerized solutions or multiple cabinets containing batteries and inverters.

For large installations, we typically provide a quotation that includes the required distribution panel, and in some cases, a substation – where applicable.

Backup power – Provides electricity during short-term outages.
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‍Island mode / off-grid operation – Enables longer-term operation during outages or in off-grid setups.
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‍Ancillary services – Supports Svenska Kraftnät (the Swedish national grid operator) by helping to balance the grid.

‍Peak shaving – Reduces power peaks to lower the required main fuse rating or to prevent tripping the fuse during high loads.

‍Energy arbitrage – Charges the battery with low-cost electricity during off-peak hours and discharges it during peak hours to reduce costs or sell electricity at a higher price.
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‍Solar energy balancing – Stores excess solar energy during the day and makes it available for use during the evening or nighttime.

No, for example, energy arbitrage or ancillary services cannot be performed during a power outage. Our equipment requires an internet connection, and in some cases, the inverters need AC input from the grid (such as power from the building’s main supply). When ancillary services are active, the battery system cannot simultaneously perform other tasks. However, it is possible to schedule different operations, such as peak shaving between 07:00 and 18:00, and ancillary services between 18:00 and 07:00.

Inertia, frequency, voltage, system constraints, and more — these are just some of the factors that need to be considered when balancing an electricity grid. But don’t worry, you don’t need a PhD in nuclear physics. Balancing the grid is a highly complex task, and here we’ll explain the basics. Svenska kraftnät’s (SVK) role is to reliably ensure that the power grid can match supply and demand every single second — this is what it means to balance the grid.When you think about how electricity demand rises and falls throughout the day, and how it can be affected by weather conditions, it’s easy to see how quickly that demand can change. To manage this, SVK relies on a wide range of tools. Electricity is transported across all regions of Sweden, and key parameters like voltage (volts) and frequency (Hz) must be carefully regulated across the entire national grid. This ensures that the power produced in large reactors and turbines can safely be used by everyday electronics plugged into wall sockets. SVK’s mission is to ensure that all of this happens smoothly and efficiently. To do so, they work with partners to provide ancillary services — critical tools that help keep our grid stable, secure, and as cost-effective as possible.

Considering the ongoing efforts both internationally and nationally, we assess that electricity prices will remain high compared to historical levels. At the same time, we believe that market volatility will gradually decrease, meaning electricity prices will trend downward over a longer time horizon.However, imbalances in the power market are expected to remain high. What does this mean?

We believe these imbalances will persist due to a lack of turbines within major dispatchable energy sources – such as hydropower, nuclear, gas, oil, and combined heat and power (CHP) plants. Solar and wind power, while renewable, do not provide dispatchable energy unless combined with energy storage.In parallel, the green transition is accelerating: society is becoming increasingly electrified while dispatchable energy becomes increasingly scarce. This combination will likely lead to continued imbalances in the power grid.

In summary: We expect revenues from ancillary services to remain strong, while electricity prices gradually stabilize over time.