What is BESS?

A BESS is a battery storage system connected to the company’s electrical installation. The purpose of a BESS system is to store electricity, which can provide a range of financial benefits in the volatile power market that characterises Northern Europe.

We have delivered solar systems to these and many more

We have delivered solar systems to these
and many more

Battery Energy Storage System

What is BESS?

BESS (Battery Energy Storage System) is a battery storage system connected to the company’s electrical installation.

A BESS system is available in various sizes and requires approval from both energy stakeholders and fire authorities during installation. The purpose of installing a BESS system is to store electricity, which can provide a range of financial benefits in the volatile power market that characterises Northern Europe. The greatest benefits are achieved if there has already been investment in renewable energy generation, either rooftop or ground-mounted—typically solar PV systems—which produce “free” electricity during daylight hours.

Investing in BESS battery storage

A BESS system is a technically and financially complex investment that affects energy supply, operations, and risk profile. Although the technology is mature, the underlying conditions vary significantly from one business to another. Therefore, it is crucial that the decision to invest in BESS is made on an informed basis and with realistic expectations regarding both benefits and limitations.

Develop a realistic business case
A BESS investment should always be assessed through a comprehensive business case that reflects costs, savings, and revenues over the system’s expected lifetime. It is essential that the business case is based on realistic assumptions—not on maximum or theoretical scenarios.

The business case should include all relevant CAPEX and OPEX elements, including investment, service, software, warranties, and any battery depreciation. On the revenue side, both stable savings and more variable income sources must be included—with a clear distinction between secure and uncertain elements.

In addition, sensitivity analyses should be carried out to show how changes in electricity prices, tariffs, usage, or battery wear affect returns. A realistic business case does not necessarily deliver the highest return on paper, but it provides the best basis for a decision that holds up over time.

Read more about the BESS business case

Gain certainty before investing

Choose the right BESS installer

The choice of installer is decisive in whether the BESS system meets both technical requirements and financial expectations. A BESS is not a plug-and-play solution, but a complex system that must be designed, integrated, and operated correctly over many years.

A qualified BESS installer should be able to document experience with similar systems, have in-depth knowledge of applicable rules and standards, and take responsibility for the entire process from design to commissioning. Equally important is the ability to incorporate operational and market integration from the outset.

The installer often plays a central role in the dialogue with grid companies, authorities, and other stakeholders. Therefore, the collaboration should be based on clear roles, transparency, and long-term accountability—not price alone. A good choice at this stage significantly reduces risk and increases the likelihood that the system delivers the expected value throughout its lifetime.

    5 good reasons to invest in battery storage

    Gain major benefits by investing in BESS

    In a time of rising electricity prices, increased electrification, and greater volatility in the energy market, Danish businesses face new demands on their energy consumption. At the same time, pressure is growing to reduce CO₂ emissions and document active efforts towards the green transition. Battery Energy Storage Systems (BESS) provide businesses with an effective tool to optimise energy consumption and strengthen operational reliability.

    With a BESS, a business can take control of when and how electricity is used, rather than relying solely on the power grid. The solution creates flexibility in day-to-day operations with volatile electricity prices and new tariffs. In addition, energy storage opens up new business opportunities within the energy system. The investment also contributes to a more robust and future-proof energy strategy. Against this backdrop, there are several concrete advantages that make BESS an attractive investment. Here, we review the five most important reasons.

  • Lower electricity costs through peak shaving

    BESS makes it possible to store electricity when prices are low and use it during peak demand periods. This reduces both energy costs and demand charges. Particularly relevant in Denmark, where electricity market price fluctuations are significant.

  • Increased security of supply and operational stability

    A BESS can function as backup during power outages and voltage fluctuations. It protects critical systems and production from downtime. For many businesses, operational reliability directly equals revenue.

  • New revenue opportunities via the balancing market

    BESS can participate in ancillary services such as frequency regulation and flexibility markets. This creates an additional revenue stream by making capacity available to the power grid. The Danish energy market is already mature for this.

  • Stronger ESG profile and future-proofing

    Investing in energy storage reduces the CO₂ footprint and supports the green transition. It strengthens the company’s ESG reporting and brand with customers, investors, and authorities. At the same time, it prepares the business for future requirements and tariffs.

  • Better utilisation of solar and wind energy

    Businesses with solar PV can store surplus generation instead of exporting it to the grid at a low price. This significantly increases self-consumption and improves the return on investment in renewable energy. At the same time, dependence on the grid is reduced.

Download our White Paper

SolarFuture has compiled all our knowledge, market insights, and practical experience with Battery Energy Storage Systems (BESS) in a comprehensive white paper that gives you a clear and up-to-date overview of the Danish BESS market.

In the white paper, you will receive, among other things:

  • Insight into regulatory frameworks and market conditions that affect BESS projects in Denmark
  • Concrete technical and commercial considerations that are crucial for profitable BESS solutions
  • Perspectives on how BESS can create value through flexibility, electricity markets, and the green transition

You can download the white paper directly on this page by completing the contact form. In return, you will gain access to a valuable decision-making basis that can be used for both strategic considerations and concrete projects within energy storage and the green transition.

Contact us for the White Paper

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