Best Energy Storage Tech Companies in Sweden
The 94 best Energy Storage Tech companies in Sweden in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Northvolt.
Ranking the best Energy Storage Tech companies in Sweden by disclosed equity funding, this directory tracks 94 ventures carrying a combined $9.7B in funding, and the concentration is striking. Northvolt alone accounts for $9.0B of that total, which tells you something about how capital flows in deep-tech hardware. Polarium has pulled in $274M, Flower $109M, and Echandia $36M, so even outside the headline giant, real money is moving. The global market for energy storage is forecast at a 41.0% CAGR, driven by high electricity prices and declining project costs, and as shown in 2017 research, the economics of lithium-ion storage have been shifting faster than most grid planners anticipated.
So what's actually hot right now? Coverage in Sweden is holding steady, but the themes pulling attention are solar PV, lithium-ion storage, and renewables integration. Mobile app installs across energy categories are growing at roughly +28% year-over-year, which I'd read as a signal that end-user demand is catching up to the infrastructure buildout. Two unicorns sit inside these 94 companies. The most active backers include EIC Fund, EIT InnoEnergy, Almi Invest, and AMF. This directory gives you the funding figures, the momentum, and the names worth watching.
- American Clean Power Association’s (ACP) Q4 2025 Clean Power Quarterly Market Report
Our analysis of 50 Energy Storage Tech companies
$13.7b in tracked funding; 88% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy Storage Tech companies in Sweden
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Market signals (1y) | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Northvolt 🦄 Manufacturer of lithium-ion batteries for electric vehicles | $9.0B | 27 mo ago | 5,000 | Harald Mix Co-Founder | DatoCMSApple iCloud MailMicrosoft 365+14 | 107 signals ▼33% Acquisition · Hiring · Funding | 581 patents Patents concentrated in chemistry & materials | — |
| 2 | Polarium 🦄 Developer of battery management systems and energy storage hardware solutions | $274M | 20 mo ago | 550 | Stefan Jansson Founder | WordPressApple iCloud MailMicrosoft 365+32 | — | — | 1 partnership |
| 3 | CTEK Provider of Electric vehicle charging solutions | $123M | 57 mo ago | 5 | Bengt Wahlqvist Founder | SentryApple iCloud MailMicrosoft 365+31 | — | — | — |
| 4 | Flower Provider of energy storage solutions | $109M | 19 mo ago | — | John Diklev Founder & CEO | WordPressApple iCloud MailGoogle Workspace+18 | — | — | — |
| 5 | Charge Amps Provider of electric vehicle charging products, services, and related accessories | $44M | 50 mo ago | 1 | Boel Swartling Co-Founder | WordPressMySQLRedis+31 | — | 13 patents EV charging connectors and sockets with integrated visual status indicators. | — |
| 6 | Echandia Manufacturer of maritime battery systems engineered for heavy-duty vessel applications | $36M | 15 mo ago | 30 | — | WordPressMySQLPHP+23 | 3 signals ▲50% Contracts · Announcements | — | 4 launchs |
| 7 | Altris Developer of sodium-ion battery technology for sustainable energy solutions | $27M | 7 mo ago | 28 | Tim Nordh Co-Founder & CTO | WebflowGSAPMicrosoft Advertising+12 | — | 64 patents Sodium‑potassium ion battery manufacturing and Prussian white cathode materials | 1 launch · 1 partnership |
| 8 | Cell Impact Manufacturer of flow plates for hydrogen fuel cells and electrolyzers | $20M | 68 mo ago | 118 | — | YouTubeMicrosoft ASP.NETPhotoSwipe+14 | 5 signals ▲150% Contracts | 47 patents High‑speed impact metal forming and powder compaction for forging and shaping. | — |
| 9 | SaltX Technology Saltwater based energy storage system | $17M | 71 mo ago | 12 | — | WordPress Block EditorWordPressMySQL+17 | 11 signals Leadership · Earnings · Announcements | — | — |
| 10 | Azelio Provider of solar thermal energy generation technology | $11M | 55 mo ago | 134 | — | — | — | 67 patents Stirling engine power control and high-temperature thermal energy storage systems | — |
| 11 | myFC Fuel cell technology solution provider | $7M | 85 mo ago | 11 | — | — | — | 138 patents Fuel cell power modules and hybrid fuel‑cell/battery systems for electric vehicles | — |
| 12 | Elonroad Road-embedded EV charging infrastructure | $5M | 41 mo ago | 29 | Kim Svedmark Co-Founder & CIO | StoryblokNode.jsRadix UI+14 | — | 86 patents In-road conductive power rails and control systems for dynamic vehicle charging | 2 partnerships |
| 13 | Plagazi Developer of technology converting non-recyclable waste into circular hydrogen | $5M | 12 mo ago | 21 | — | — | — | 37 patents Sustainable fuel synthesis and waste-to-chemical resource recovery technologies. | — |
| 14 | Waybler Electric vehicle charging solution | $2M | 95 mo ago | 24 | Kurt Hognelid Co-Founder & CEO | Node.jsThree.jsBootstrap+14 | — | 13 patents Integrated street curbstones with built‑in EV charging and dynamic power distribution | — |
| 15 | Cling Systems Provider of a platform for sourcing and transacting battery materials | $2M | — | 7 | — | — | — | — | — |
| 16 | Alelion Energy Systems Manufacturer of lithium ion batteries | $2M | 90 mo ago | 45 | — | WordPress Block EditorWordPressMySQL+9 | — | 35 patents Battery management and health monitoring for industrial vehicle and grid storage systems | — |
| 17 | Enerpoly Manufacturer of zinc-ion batteries | $2M | 30 mo ago | 12 | Mylad Chamoun Co-Founder & CTO | RubyAnimate.cssVarnish+16 | — | 10 patents Patents concentrated in electrical & electronics | — |
| 18 | Southern Lights Green hydrogen projects assessment solution | $2M | 27 mo ago | 3 | Anton Frisk Co-Founder | WordPressMySQLPHP+21 | — | — | — |
| 19 | Cellfion Developer of bioenergy project | $1M | 27 mo ago | 6 | Liam Hardey Co-Founder & CEO | — | — | 7 patents Patents concentrated in electrical & electronics | — |
| 20 | Nortical Provider of software solutions to improve battery efficiency | $1M | 67 mo ago | 12 | Axel Kullander Co-Founder & CEO | — | — | — | — |
| 21 | Rivus Provider of redox flow-based energy storage solutions | $570K | 30 mo ago | 2 | Cedrik Wiberg Founder & CEO | HubSpot CMS HubHubSpotcore-js+11 | — | 5 patents Aqueous redox flow battery electrolytes and novel redox-active compounds | 1 award |
| 22 | Qoitech Developer of tools for low-power measurement, battery analysis, and optimization | $552K | 42 mo ago | 15 | Vanja Samuelsson Founder & CEO | WordPressMySQLPHP+22 | — | 5 patents Patents concentrated in computing, sensing & instrumentation | 3 launchs |
| 23 | ReVibe Energy Energy harvesting by converting vibrations into electricity | $450K | 79 mo ago | 12 | — | WordPressMySQLPHP+32 | — | 24 patents Self-powered multi-node sensor networks for machine monitoring and micro-energy harvesting. | 3 job openings · 1 launch |
| 24 | Insplorion Developer of sensors for hydrogen infrastructure, production, and application | $410K | 67 mo ago | 8 | Christoph Langhammer Co-Founder | Node.jsLuaYouTube+14 | 4 signals ▲300% Earnings · Leadership | 6 patents Patents concentrated in computing, sensing & instrumentation | — |
| 25 | Celcibus Provider of hydrogen fuel storage solutions | $399K | 66 mo ago | 6 | Anders Palmqvist Founder | — | — | 7 patents Advanced porous carbon fuel‑cell electrodes functionalized with macrocyclic metal chelates | — |
| 26 | TEXEL Developer of energy storage and waste heat to electricity solutions | $321K | 36 mo ago | 12 | Lars Jacobsson Chairman & CEO | WordPress Block EditorElementorWordPress+24 | — | — | — |
| 27 | Solelia Greentech Developer of solar banking system | $115K | 90 mo ago | 3 | Daniel Wahlberg Founder & Board Member | — | — | — | — |
Top 12 Energy Storage Tech companies in Sweden
#1
Series B · Uppsala, Uppsala County · founded 2017 · 28 employees$27.2Mraised▾
Developer of sodium-ion battery technology for sustainable energy solutions. The company provides sodium-ion cathodes, electrolytes, cell designs, and factory blueprints. It offers commercial battery cells for niche applications. The company’s patented cathode manufacturing process ensures continuous output of high-quality material.
#2
Acquired · Stockholm · 5000 employees$9Braised▾
Manufacturer of lithium-ion batteries for electric vehicles. It provides solutions for new production technologies to deliver low-cost lithium-ion batteries to be used in electric and off-highway vehicles. It provides custom cells optimized for a particular application, battery system, and more.
#3
Polarium 🦄Series D · Stockholm, Stockholm County · founded 2015 · 550 employees$273.6Mraised▾
Developer of battery management systems and energy storage hardware solutions. These products facilitate energy storage for residential, commercial, industrial, and telecommunications applications. The hardware integrates with software to manage power availability, optimize energy consumption, and support grid stability. The systems enable users to store energy for reserve power, reduce costs through peak shaving, and participate in energy markets. The technology supports the integration of renewable energy sources by providing scalable storage capacity for various infrastructure requirements.
#4
Series B · Solna, Stockholm County · founded 2009 · 30 employees$36Mraised▾
Manufacturer of maritime battery systems engineered for heavy-duty vessel applications. These systems are designed for safety, durability, and optimized performance in demanding maritime environments. The battery systems handle rapid charging, high power peaks, and numerous cycles without degradation. They offer long lifecycles and are suitable for various vessels, including ferries and naval ships.
- Mar 2025Series B$34M
- Aug 2018Grant (prize money)$1.4M
- Sep 2016Grant (prize money)$533.8K
- Jan 2016Grant (prize money)$44.1K
#5
Series A · Stockholm, Stockholm County · founded 2020$108.6Mraised▾
Provider of energy storage solutions. They offer wide range of solutions such as virtual power plant,grid balancing services,renewable energy integration and AI driven energy optimization solutions. They offer an AI powered platform to stabilizing the energy system by enhancing predictability and flexibility.
- Nov 2024Series A$21.7M
- Aug 2024Series A$27.5M
- 2024Conventional Debt$44.1M
#6
Series A · Bastad, Skane County · founded 2007 · 21 employees$4.8Mraised▾
Developer of technology converting non-recyclable waste into circular hydrogen. The technology uses plasma gasification to break down waste into synthesis gas. Carbon dioxide in the syngas is captured and stored. The process produces sustainable hydrogen without burning natural gas or fossil fuels.
- May 2025Grant (prize money)$33.5M
- Oct 2022Series A$4.8M
#7
Seed · Stockholm, Stockholm County · founded 2020 · 2 employees$20Kraised▾
Provider of energy storage systems for electric vehicles
- Jun 2025Seed$1.5M
- 2023Seed$20K
#8
Acquired · Vikmanshyttan, Dalarna · founded 1997 · 5 employees$123.1Mraised▾
Manufacturers of EV chargers and these chargers are majorly used for charging automotive batteries. .Since its founding, CTEK has sold about 6,2 million battery chargers in 70 countries around the world. The company provides battery chargers to a number of the world’s leading automobile manufacturers like Alfa Romeo, Arctic Cat, Audi, Bentley, BMW, Corvette, Ferrari, Lamborghini, Lexus, Maserati, Maybach, Rolls-Royce, Scania and Yamaha among others.Armada Mezzanine Fund had provided mezzanine financing in support of the Altor Fund's acquisition of CTEK Creator Group from FSN Capital in August, 2011.
- Sep 2021PE$123.1M
- Sep 2019Conventional Debt—
- 2011Conventional Debt—
#9
Series B · Solna, Stockholm County · founded 2012 · 1 employees$44.4Mraised▾
Provider of electric vehicle charging products, services, and related accessories. The company develops user-friendly charging solutions for homes, businesses, and public spaces. Product offerings include chargers, cables, mounting equipment, and monitoring devices. Services encompass cloud-based management, connectivity solutions, and certified installation support.
- Apr 2022Series B$15.9M
- Mar 2021Series B$15.3M
#10
Seed · Stockholm, Stockholm County · founded 2018 · 12 employees$1.9Mraised▾
Manufacturer of zinc-ion batteries. It develops environmentally friendly and rechargeable zinc-ion batteries for stationary energy storage solutions. Additionally, it offers non-toxic and recyclable zinc-ion batteries.
- Dec 2023Grant (prize money)$8.4M
- Oct 2023Grant (prize money)$600K
- Mar 2023Grant (prize money)$9.9M
- Dec 2022Seed$1.5M
#11
Seed · Stockholm, Stockholm County · founded 2022 · 3 employees$1.7Mraised▾
Green hydrogen projects assessment solution. It provides a SaaS based tool to design, simulate and assess economics or feasibility of hydrogen projects. It allows customers to iterate faster on project designs and increase the quality and auditability of the hydrogen projects.
- Mar 2024Seed$1.7M
#12
Seed · Norrkoping, ostergotland County · founded 2020 · 6 employees$1.3Mraised▾
Developer of bioenergy project
- Mar 2024Grant (prize money)$2.7M
- Aug 2022Seed$1.3M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Storage Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Grid Energy Storage is moving in Sweden
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 409 Sweden-affiliated papers.
- Chalmers University of Technology94
- KTH Royal Institute of Technology91
- Uppsala University52
- Lund University30
- Luleå University of Technology22
- Battery (electricity)1→30
- Supercapacitor3→17
- Renewable energy1→13
- Capacitance2→12
- Anode1→10
- Renewable energy1→44
- Battery (electricity)2→43
- Automotive engineering1→17
- Electrode1→17
- Flexibility (engineering)1→13
- Battery (electricity)20
- Nanotechnology9
- Electrolyte7
- Flexibility (engineering)7
- Supercapacitor7
Where energy storage is researched across Sweden
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.