Revolutionize the way you store and use energy

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Trusted by businesses like yours

Use energy more efficiently and support the grid. Cactos works in the most profitable way for you. Always.

Why Cactos?

Shift consumption and save
Cactos charges up when electricity is cheap and releases it when prices spike. This helps you cut the extra costs caused by high-demand hours.
Cut your demand charges
When your local energy consumption peaks, demand charges rise. Cactos evens out those peaks by using stored energy, helping you save money.
Boost your peak power capacity
Need more power than your connection allows? Cactos lets you handle higher peak loads without the cost of upgrading your grid connection.
Make the most of your own energy
Don’t settle for selling your solar or wind energy at the wrong time. Cactos stores it so you can use it or sell it when it’s most profitable.
Stay powered during outages
Unpredictable outages? Not a problem. The Cactos Cardo model acts as your safety net, keeping everything running smoothly when the grid goes dark.
Turn energy into extra income
Cactos opens the door to ancillary service markets, where you can support the grid and earn revenue—all without lifting a finger.

Curious to learn more?

Let us show you how Cactos works and how it can transform your energy use. Book a remote demo and let’s talk.

Your smart battery storage, made in Finland

From advanced batteries to smart software, the Cactos system is designed and built in Finland. It works quietly in the background, optimizing your energy use without you having to do a thing.

Cactos Cardo

Battery energy storage for commercial and public properties

Developed for businesses and public organizations, Cactos energy storage systems save money and improve energy efficiency, 24/7.

Made for every industry

Logistics centers, farms, factories, service stations, apartment buildings—Cactos is built to adapt to any business. We’re proud to serve customers of all sizes, from family businesses to enterprises.

Bloks: Turning challenges into savings

For Bloks, power outages were a costly problem. With a Cactos energy storage system, they keep operations running smoothly during blackouts while storing solar energy for future use—and saving money in the process.

Bloks and Cactos Spine

Our customers

"Cactos helps us in many ways. First and foremost, it saves us money – we generate solar energy with our own panels, which Cactos stores when the sun shines and makes available for use at night. If we had to rate our experience on a scale from zero to ten, we have no complaints: it's a solid ten."
Arto Manninen
CEO, Bloks Oy
“The Cactos One unit will provide our housing units with emergency power, automatically optimise our consumption and maximise the benefit of our local generation. We look forward to continuing our work with the Cactos team.”
Jenni Venäläinen
Project Manager,
Helsinki City Housing Company,

Us in the news

Cactos builds energy storage systems with old Tesla batteries. It just raised $28.5 million with this 24-slide pitch deck.
Tesla batteries repurposed for smart energy storage
Helsinki-based startup Cactos secures over €26M for BESS investment
Finnish startup Cactos raises over €26 million to double down on its battery energy storage system portfolio
Finnish Cactos grabs €26 million to power up expansion of smart energy storage systems
Suomalaisyhtiö tekee jopa vanhoista Teslan akuista sähkövarastoja: Keräsi yli 26 miljoonaa euroa
Sustainability Takes Center Stage as EU GreenTech Funding Booms
Suomalainen yritys tekee Teslan akuista sähkövarastoja, jotka säästävät rahaa ja suojaavat sähkökatkoksissa – Keräsi 2,5 miljoonaa rahoitusta
Finland looks to spark shift to carbon-neutral mobility
Tesla EV battery packs repurposed into energy storage systems in Finland and California
Finnish start-up is turning Tesla EV batteries into storage systems
Breathing new life into spent Tesla EV batteries, Cactos raises €2.5 million to meet growing customer demand
Finnish startup Cactos raises €2.5 million to tackle the energy crisis with second-life Tesla batteries

Let’s power your future together

Want to see how Cactos can meet your needs—or request a quote? Get in touch today.

What’s in it for you

No matter what kind of business or property you run and where, it’s normal for localised energy consumption to vary throughout the day. These four usage benefits will help navigate the grid while saving you time, energy and dollars. And the best part is that Cactos Spine does them for you automatically on the background.

Smart shifting – charging when cheap, unloading when not.

If you run a business or property that doesn’t operate 24/7, your energy demand only rises during working hours. Cactos One charges when electricity is cheap and discharges when you need it most during the expensive hours. This way you you can lower the electricity bills.

Storing energy – for the days when the sun don’t shine.

Cactos One stores locally produced green electricity, such as from solar panels, and uses this emission-free electricity during periods when it’s most needed – cloudy, windless days or when energy prices are especially high. This gives you greater energy independence.

Back-up power – zero disruptions to your operations.

Cactos One acts as an active backup power source, anticipating future events using AI and machine learning by continually monitoring  live and historic data. Like a crystal ball, it can prepare for power outages in advance, ensuring no loss of electricity at your facilities.

Peak shaving – leveling out peaks in electricity consumption.

When the localised consumption causes a significant spike in the load curve, you could end up with an imbalanced grid and a higher energy bill. Cactos One levels out those load spikes for you by using stored electricity without disruptions to your schedules or production.