Grid-scale battery storage from a single partner

Reach commercial operation without delays with a Finnish-made battery energy storage system. We take care of commissioning, operation and maintenance.

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30 MWh

Installed grid-scale capacity

300+

Installed C&I sites

10.3 MWh

Largest installed system
Cactoksen verkkomittakaavan akkupuisto

Batteries, software and maintenance included

Whether you are planning to build a battery storage system on an empty site, add flexibility to renewable energy production, or implement a grid-scale battery system alongside large electricity consumption, Cactos is your partner.

We deliver a grid-scale battery storage system sized to your needs, without delays. We take care of delivery, installation, commissioning, operation and electricity market participation.

Participating in the electricity markets is currently available for projects in Finland. Contact us to find out about availability in your country.

Hardware, software, commissioning and maintenance from a single partner
Manufactured in Finland at our factory in Kempele
Approximately 9 months from order to commercial operation

Why Cactos?

Unprecedentedly fast delivery
You get everything related to energy storage from us: the battery system, control software, commissioning, market participation and maintenance. That's why we can deliver your project in as little as 9 months.
Participate in multiple electricity markets
Participate in Nord Pool intraday and day-ahead markets, ancillary service markets and the joint transmission and distribution network congestion management marketplace in Finland. Contact us to find out about market availability in your country.
Possibility to lease your system
No large upfront investment and no technical headaches over a 10-year contract period: if you prefer, you can access the battery storage system as a leasing service.
Finnish craftsmanship from start to finish
We manufacture our systems in Finland, from battery modules to the final line of code in the Cactos Spine control and energy management system.
Critical infrastructure with bank-level security
Our software and interfaces are developed using the latest technologies, compliant with the IEC 62443 cybersecurity standard.
High uptime even during maintenance
The Cactos system is built from parallel battery units. If one string is temporarily offline, the others continue operating.

Grid-scale battery energy storage

Cactos Nevado

Nevado

A modular battery storage system

Nevado is a high-power, liquid-cooled battery energy storage system designed for grid-scale projects. It is built to operate reliably even in the most demanding conditions.

Three variants are available, starting from over 2 MW of power and over 4 MWh of capacity per unit. By combining multiple units, the system scales up to 50 MWh.

System capacity: 4–50 MWh
System power: 2–25 MW

Features and technical specifications

Nevado 2.2
Nevado 3.3
Nevado 4.4
Features in grid scale projects
Fingrid ancillary service markets in Finland (FCR-N, FCR-D, aFRR)
✔
✔
✔
Nord Pool intraday and day-ahead markets
✔
✔
✔
Joint transmission and distribution network congestion management marketplace in Finland
✔
✔
✔
Automatic market participation
✔
✔
✔
24/7 monitoring and control
✔
✔
✔
All maintenance and updates
✔
✔
✔
Nevado 2.2
Nevado 3.3
Nevado 4.4
Additional local features
Peak shaving
✔
✔
✔
Load shifting
✔
✔
✔
Storage of locally produced energy
✔
✔
✔
Nevado 2.2
Nevado 3.3
Nevado 4.4
Technical specifications
Battery capacity
4 180 kWh‍
6 688 kWh
9 196 kWh
Charging and discharging power
2,195 kVA
3,290 kVA
4,390 kVA
Battery modules
LiFePo4
LiFePo4
LiFePo4
Cycle life
8 000 cycles, 70% SOH (25 °C)
8 000 cycles, 70% SOH (25 °C)
8 000 cycles, 70% SOH (25 °C)
Battery management system
Cactos BMS
Cactos BMS
Cactos BMS
Permitted operating temperature
-30 – 45 °C
-30 – 45 °C
-30 – 45 °C
Dimensions H x W x D
Batteries: 1,650 × 10,282 × 3,135 mm
‍Inverter: 3,500 x 2,000 x 2,200 mm
‍Transformer: 2,655 × 5,200 × 2,520 mm
Batteries: 1,650 × 13,683 × 3,135 mm
‍Inverter: 3,500 x 2,000 x 2,200 mm
‍Transformer: 2,655 × 5,200 × 2,520 m
Batteries: 1,650 × 18,783 × 3,135 mm
Inverter: 3,500 x 2,000 x 2,200 mm
‍Transformer: 2,655 × 5,200 × 2,520 mm
Total weight
Batteries: 42,500 kg
‍Inverter: 5,200 kg
Transformer: 5,500 kg
Batteries: 68,000 kg
Inverter: 5,350 kg
Transformer: 6,850 kg
Batteries: 93,500 kg
Inverter: 5,500 kg
Transformer: 8,200 kg
Enclosure protection rating
IP 54
IP 54
IP 54
Grid voltage
20 kV
20 kV
20 kV
Grid frequency
50 Hz
50 Hz
50 Hz
Recycling
Cactos is a part-owner of Recser and charges statutory recycling fees on a pass-through basis.
Cactos is a part-owner of Recser and charges statutory recycling fees on a pass-through basis.
Cactos is a part-owner of Recser and charges statutory recycling fees on a pass-through basis.

Completed projects

9.2 MWh battery storage system at NTRN Energy Park
Our customer Enetron acquired a 4.4 MW / 9.2 MWh battery storage system for their NTRN Energy Park 01 site in Kiiminki. The system was delivered in January 2026 and entered commercial operation in February. It is built around a single third-generation Cactos Nevado unit and participates in Fingrid's reserve markets as well as wholesale electricity markets.
Total system power: 4.4 MW
Participates in FCR-N, FCR-D and aFRR reserve markets, and intraday and day-ahead wholesale markets
10.3 MWh battery storage system in Kuhmoinen
We delivered a 10.3 MWh battery storage system to our customer Rando Grid in Kuhmoinen. The project kicked off in June 2024, a construction permit was granted in August, and commercial operation began in January 2025. The system automatically participates in both reserve markets and wholesale electricity markets, supporting grid stability and efficient energy use.
Total system power: 5 MW
Participates in FCR-N, FCR-D and aFRR reserve markets, and intraday and day-ahead wholesale markets
Read more

How to get started

1. Assessment
The project begins with an assessment of the site and grid connection possibilities, as well as the project goals.

We support both early-stage ideation and situations where land and a grid connection are already in place.
2. Permits
Battery storage projects typically require at least a construction permit. The process depends on the municipality and local zoning.

We provide the necessary technical documentation and support the application process.
3. Delivery
Cactos delivers, installs and commissions the battery storage system. Our delivery time from order to commercial operation is approximately 9 months.

We can also discuss a broader turnkey implementation.
4. Operation
Once the project is complete, the system participates in electricity markets. Cactos operates and maintains the battery storage system.

The system can also store locally produced energy or optimise the site's energy use.

Let's talk about your project

We can help with early-stage assessments as well as moving your plans forward. We'll get back to you soon.

Grid-scale sales and inquiries
Matti Aschan
Matti Aschan
‍‍CSO
firstname.lastname[a]cactos.fi
Grid-scale sales and inquiries
Matti Aschan
‍CSO
firstname.lastname[a]cactos.fi
Cactos Spine UI

Over 300 installed systems

We operate a fleet of over 300 battery storage systems and optimise its performance around the clock using weather forecasts, advanced algorithms and machine learning.

With our systems, you can participate in Nord Pool wholesale markets and ancillary service markets. We are also one of the first battery storage operators on the joint transmission and distribution network congestion management marketplace in Finland, providing a significant additional revenue stream.

Participation in the electricity markets is currently available for projects in Finland. Contact us to find out about availability in your country.

Broad electricity market participation
Automated system control
Monitor your system's performance in real time via the Cactos Spine application, anytime and anywhere

Nordic partner from start to finish

In geopolitically uncertain times, protecting critical infrastructure is more important than ever. Cactos systems are designed and built entirely in Finland at our factory in Kempele, without external parties. Our software and interfaces are built using the latest technologies and offer bank-level cybersecurity, compliant with the IEC 62443 standard.

What are grid-scale projects and why are they built?

Grid-scale battery energy storage systems are battery installations of at least one megawatt in size. They are used to balance the electricity system, store renewable energy and participate in electricity markets.

Typically, these are battery storage systems on separate sites whose revenues come from reserve and wholesale markets. The system can also be located alongside a large consumption site, where it can optimise the site's own electricity use in addition to generating market revenues.

FAQ

Olipa kiinteistösi millainen tahansa, jokainen päivä energiamaailmassa on erilainen. Alla kerrotut hyödyt auttavat sinua suunnistamaan sähköverkossa säästäen samalla aikaa, energiaa ja rahaa. Ja vieläpä automaattisesti, sillä asiakkaana sinut ei tarvitse puuttua järjestelmän toimintaan, Cactos Spine tekee sen sinun puolestasi.

Who are Cactos grid-scale battery storage systems suitable for?

Our grid-scale battery storage systems are suited to grid operators, renewable energy producers and property developers who want to participate in wholesale and reserve electricity markets using battery storage. Grid-scale battery storage is also an excellent fit alongside large consumption sites such as industrial facilities or data centres for optimising electricity management.

Which markets does a Cactos battery storage system participate in?

In Finland, Cactos battery storage systems participate in Nord Pool intraday and day-ahead markets, Fingrid's reserve markets (FCR-N, FCR-D, aFRR), and the joint transmission and distribution network congestion management marketplace.

Currently, participation is available in Finland. Contact us to learn more about your country's status.

Who handles the trading?

Cactos handles everything related to battery storage optimisation and trading automatically via the Cactos Spine software.

How are market revenues paid to the customer?

Market revenues are settled to our customers once a month.

What size system can Cactos deliver?

Cactos can currently deliver systems of up to 50 MWh in capacity.

What warranties and maintenance does Cactos offer?

The leasing agreement includes a 10-year full warranty. For direct purchases, the warranty is 2 years, extendable for an additional fee.

System monitoring, updates and maintenance are included in the agreement.

How does a project start and how long does it take?

The project begins with an assessment of the land area and grid connection possibilities, as well as the project goals. The typical permitting process varies by municipality and most often takes 2–3 months. Cactos battery storage systems have a delivery time of approximately 9 months from order to commercial operation.

What is the customer's responsibility in the project?

The customer is responsible for permitting, civil works and foundations, and the grid connection. For Nevado systems, the transformer and transformer substation are always included in Cactos' scope of delivery. We can also discuss a broader turnkey implementation if preferred.

Let's talk about your project

Do you have a land area or an ongoing project? We are your partner at every stage — from project development to system delivery.

Talk to us