Grid-scale battery energy storage solutions
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.
35 MWh
Installed grid-scale capacity
300+
Installed C&I sites
14.2 MWh
Largest installed system
Batteries, software and maintenance included
Whether you are planning to build a battery storage system on a green field 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.
Why Cactos?
Fast and reliable solution 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 efficiently.
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.
Secure critical infrastructure
Our software and interfaces are developed using the latest technologies, compliant with the IEC 62443 cybersecurity standard.
High uptime and availability
The Cactos system is built from parallel battery units. If one string is temporarily offline, the others continue operating.
Grid-scale battery energy storage
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.
Features and technical specifications
| Feature | Nevado 2.1 | Nevado 3.3 | Nevado 4.4 |
|---|---|---|---|
| Fingrid ancillary service markets | ✔ | ✔ | ✔ |
| Nord Pool intraday and day-ahead markets | ✔ | ✔ | ✔ |
| Automatic market participation | ✔ | ✔ | ✔ |
| 24/7 monitoring and control | ✔ | ✔ | ✔ |
Technical specifications
| Specification | Nevado 2.1 | Nevado 3.3 | Nevado 4.4 |
|---|---|---|---|
| Battery capacity | 4 180 kWh | 6 688 kWh | 9 196 kWh |
| Charging and discharging power | 2,090 kVA | 3,290 kVA | 4,390 kVA |
| Cycle life | 8 000 cycles | 8 000 cycles | 8 000 cycles |
| 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 | 1,650 × 10,282 × 3,135 mm | 1,650 × 13,683 × 3,135 mm | 1,650 × 18,783 × 3,135 mm |
Completed projects
14.2 MWh battery storage system at NTRN Energy Park
Our customer Enetron acquired a 5.5 MW / 14.2 MWh battery storage system for their NTRN Energy Park 01 site in Kiiminki. The system consists of two Cactos Nevado units and participates in Fingrid's reserve markets as well as wholesale electricity markets. The first energy storage unit was delivered in January 2026 and entered commercial operation in February.
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 system automatically participates in both reserve markets and wholesale electricity markets, supporting grid stability and efficient energy use.
How to get started
Assessment The project begins with an assessment of the site and grid connection possibilities, as well as the project goals.
Permits Battery storage projects typically require at least a construction permit. We provide the necessary technical documentation and support the application process.
Delivery Cactos delivers, installs and commissions the battery storage system. That way, we can secure fast and reliable delivery.
Operation Once the project is complete, the system participates in electricity markets. Cactos operates and maintains the battery storage system.
FAQ
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.
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). Currently, participation is available in Finland.
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.