BESS batteries – also known as Battery Energy Storage Systems – have rapidly become one of the most attractive investment and business opportunities in the Danish energy market. As Energinet’s demand for flexible resources to balance the electricity grid continues to grow, significant revenue potential is emerging for companies, farms, and energy investors who choose to invest in battery storage. Not merely as a technological add-on, but as a standalone, well-documented business model with strong returns and short payback periods.

As the share of renewable energy in the power system increases, so does the need for fast and precise grid regulation. Wind and solar energy are essential to the green transition, but they do not always produce electricity when demand is highest. This is where BESS batteries play a critical role – and where Energinet pays for the value these systems provide.

Batteries as a cornerstone of a stable power grid

Energinet is responsible for maintaining the balance between electricity production and consumption in Denmark – every single second. Even minor frequency deviations can have serious consequences for grid stability. Traditionally, this task has been handled by large power plants, but a power system increasingly dominated by wind and solar requires new, highly flexible solutions.

BESS batteries are ideally suited for this role. They can respond within milliseconds by absorbing surplus electricity or discharging power back into the grid. This ultra-fast response makes batteries particularly well suited for grid services such as frequency regulation, where stability and precision are critical.

As a result, Energinet is increasingly seeking battery capacity that can be made available to the grid – and is willing to pay attractive rates for it.

How revenue generation through Energinet works

The revenue model for BESS batteries is well established and based on market mechanisms where flexibility has a high value.

Grid services – payment for stability

Energinet procures grid services to ensure that the electricity system remains balanced at all times. BESS systems can provide several types of services, including:

• FCR (Frequency Containment Reserve) – fast, automatic frequency regulation

• aFRR (automatic Frequency Restoration Reserve) – automatic balancing to restore system stability

• mFRR (manual Frequency Restoration Reserve) – manual balancing during major deviations

Owners of battery systems receive payments in two ways:

1. Capacity payments – for making battery capacity available and ready for activation

2. Energy payments – for the actual energy delivered or absorbed when the battery is activated

This means the battery can generate revenue even when it is not actively dispatching energy, simply by being available.

Energy arbitrage – buy low, sell high

In addition to grid services, BESS batteries can generate revenue through energy arbitrage. This involves charging the battery when electricity prices are low (for example, during periods of excess wind or solar generation) and selling the stored energy when prices are higher.

The combination of grid services and energy arbitrage makes BESS systems a flexible and resilient revenue platform that can adapt to changing market conditions.

A strong business case with short payback periods

The economics of modern battery storage systems have improved significantly. Falling battery prices combined with rising demand and remuneration for flexibility typically result in payback periods of 2–4 years, and in some cases even shorter, depending on system size, usage profile, and market participation.

At the same time, revenues are relatively stable, as the need for grid services is not cyclical. On the contrary, demand is expected to increase substantially toward 2040 as fossil-based power plants are phased out and renewable generation continues to expand.

Why BESS is particularly attractive for businesses and agriculture

BESS batteries are not limited to large utilities or energy companies. On the contrary, they are highly relevant for businesses and agricultural operations that already have significant electricity consumption or on-site renewable generation.

Ultra-fast response – maximum value

The ability of batteries to respond instantly gives them a competitive advantage in grid services markets. While traditional power plants may require minutes or hours to ramp up, batteries deliver regulation within milliseconds.

Growing demand and future-proof investment

Energinet anticipates a sharp increase in the need for flexible resources over the coming decades. Investing in BESS is therefore not only a response to current market opportunities, but also a long-term investment in the future energy system.

Backup power and energy security

In addition to revenue generation, batteries can serve as backup power during grid outages. For many businesses and farms, enhanced energy security alone represents significant value, protecting operations and production from costly interruptions.

Prima Solar – an experienced and service-oriented partner

Turning investments in BESS and solar energy into a viable and long-term business requires the right partner. This is where Prima Solar has built a strong and well-deserved reputation.

For many years, Prima Solar has supported businesses and agricultural clients in establishing solar PV systems tailored precisely to their energy needs and physical conditions. The company is widely recognized for its solid craftsmanship, thorough execution, and strong service mindset – qualities that have earned long-term customer trust and loyalty.

From analysis to fully operational systems

Prima Solar simplifies complex energy projects for its clients. Each project begins with a detailed analysis of current energy consumption and site conditions. Based on this, systems are carefully designed to ensure optimal performance, financial viability, and seamless integration into daily operations.

Clients receive clear insights into expected savings, including reductions in CO₂ emissions, making each investment both economically and environmentally attractive.

Working with the best in the market

Prima Solar collaborates exclusively with proven technologies and leading suppliers. Through close cooperation with trusted partners, the company ensures that every project is managed professionally – from initial design and engineering to installation and grid connection.

This holistic approach makes Prima Solar a natural partner when integrating solar PV and BESS batteries into a single, optimized solution that delivers renewable energy, grid flexibility, and new revenue streams.

A rapidly evolving energy market

The Danish energy market is undergoing rapid transformation. Flexibility, storage, and fast-response technologies are no longer niche solutions – they are essential components of the future power system. BESS batteries offer a compelling combination of technological maturity, attractive economics, and societal relevance.

With Energinet as a stable buyer of grid services and an experienced partner like Prima Solar managing design and implementation, the barriers to entry have never been lower.

Conclusion: Batteries have become a business

BESS batteries are no longer merely a technical supplement – they represent a solid business opportunity. Revenue from grid services provided to Energinet, combined with energy arbitrage and enhanced energy security, creates a strong and future-proof business case.

For businesses and agricultural operations seeking to capitalize on the evolving energy market, the timing is right. With expert guidance and a trusted partner like Prima Solar, battery energy storage can become a profitable and sustainable investment – benefiting both the bottom line and the stability of the Danish power grid.

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