About Polarium
Company Overview
Polarium
HeadquartersStockholm, Sweden
Founded2015
SizeApproximately 400 employees globally ranged from 330-600 in recent years (source: linkedin.com, apollo.io). Revenue of about SEK 1.084 billion in 2021 with rapid growth through the early 2020s (source: mfn.se).
What They Do
Polarium specializes in lithium-ion battery energy storage solutions, focusing on telecom, commercial, industrial, and distributed energy-storage applications (source: linkedin.com, polarium.com). Their product portfolio includes batteries, battery energy storage systems (BESS), and energy optimization software, with advanced cloud-based optimization and virtual power plant (VPP) functionalities integrated through recent partnerships (source: mfn.se, polarium.com). For telecom clients, Polarium provides reliable reserve-power solutions for base stations, while commercial and industrial customers benefit from energy cost reduction, grid upgrade avoidance, and revenue generation through energy arbitrage and flexibility services (source: polarium.com, mfn.se). Their competitive advantage lies in combining battery development expertise, modular BESS design, and integrated control software, enabling partnerships in EV charging, distributed storage, and telecom power sectors (source: polarium.com, polarium.com).
Projects & Track Record
Polarium has established a strong commercial track record, particularly in telecom energy storage deployments. A notable partnership with ATC Africa involved supplying thousands of energy-storage solutions and setting up a factory in Cape Town with an annual capacity exceeding 300,000 batteries (source: mfn.se). In the commercial and industrial sector, Polarium completed a 700 kWh installation for Lindberg & Son and deployed an Energy Optimization System in 2024 for Grönlunds Plåt (source: polarium.com, polarium.com). They also collaborated with Telia on a 2022 pilot project validating smart battery solutions for telecom networks and with Areim on a large-scale battery pilot in Swedish commercial property (source: mfn.se). Additionally, Polarium partnered with Kempower to integrate their BESS technology with EV charging infrastructure, enhancing reliable power distribution (source: polarium.com).
Recent Developments
In recent years, Polarium has intensified its focus on distributed storage and EV charging infrastructure. In January 2025, it formed a strategic partnership with Stella Futura to accelerate BESS deployment in Northern Europe, combining modular battery systems with cloud-based optimization and virtual power plant solutions (source: polarium.com). In March 2026, Polarium partnered with VAROPreem to deliver intelligent storage systems for fast-charging sites across Sweden, utilizing modular BESS and energy management system (EMS) functionality to address grid connection limitations (source: polarium.com). The company also appointed Jan Roschek as Managing Director for Germany in 2026, signaling expansion in that market (source: polarium.com). Furthermore, Polarium secured an RWE tolling arrangement to market at least 50 MW and 135 MWh from its distributed battery portfolio starting in late 2026 (source: polarium.com).
Working There
Polarium offers career opportunities across a range of disciplines including battery engineering, energy storage systems design, battery management, software and energy management systems (EMS), sales, project delivery, and regional business leadership (source: polarium.com, polarium.com). The company’s main office is located in Stockholm, Sweden, with an additional U.S. office in Littleton, Colorado, supporting its global operations and regional commercial expansion (source: linkedin.com, polarium.com). Polarium’s workplace culture emphasizes expertise in intelligent energy storage, combining hardware and software innovation with customer project execution, focusing on telecom power and distributed storage markets (source: polarium.com).
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