Verified Nov 2026
Batteries & E-Mobility
·
Stockholm, Stockholm County
·
Since 2015
Polarium is a Swedish energy storage company headquartered in Stockholm, founded in 2015 by Stefan Jansson. It has an estimated 200-500 employees and an estimated revenue band of $100-250 million, and it is privately held. The company makes modular lithium-ion battery systems, including power backup, hybrid, standalone, and solar-integrated storage, and serves telecom, commercial, industrial, residential, and EV charging customers. In April 2026 it signed a multi-asset tolling agreement with RWE to aggregate battery capacity from numerous sites to support renewable integration.
Polarium at a glance
Revenue
$100-250M
Est. band
Employees
200-500
Founded
2015
Headquarters
Stockholm, Stockholm County
Certifications
ISO 14001 · ISO 45001 · ISO 9001
Import activity
118
Industries
Automotive
Electric Vehicles
Electronics
Appliance
Renewable Energy
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
118
Named foreign suppliers
33
Top origins
Mexico · South Korea · China · Singapore
Shared foreign counterparties do not establish that these companies buy from Polarium.
What this tells a buyer
Polarium's most recent reported developments include the appointment of Pontus Winberg as chief executive in October 2026 and a partnership with inexogy to deploy smart metered battery storage systems in September 2026.
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications and provides battery management software alongside its battery hardware, with manufacturing facilities listed in South Africa, Mexico, and Vietnam.
Polarium reports more than 500,000 installations worldwide and serves both business-to-business and business-to-consumer markets.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
11 years in operation (founded 2015).
Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Overview
Polarium is a Swedish energy storage company headquartered in Stockholm, founded in 2015 by Stefan Jansson. It has an estimated 200-500 employees and an estimated revenue band of $100-250 million, and it is privately held. The company makes modular lithium-ion battery systems, including power backup, hybrid, standalone, and solar-integrated storage, and serves telecom, commercial, industrial, residential, and EV charging customers. In April 2026 it signed a multi-asset tolling agreement with RWE to aggregate battery capacity from numerous sites to support renewable integration.
At a glance
Attribute | Detail |
|---|---|
Founded | 2015 |
Headquarters | Stockholm, Stockholm County |
Employees | 200-500 |
Revenue | $100-250M (estimated) |
Primary capability | Batteries & E-Mobility |
Certifications | ISO 14001 · ISO 45001 · ISO 9001 |
What Polarium makes
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications and provides battery management software alongside its battery hardware, with manufacturing facilities listed in South Africa, Mexico, and Vietnam.
Products and capabilities described on the company's own site include Battery, Battery Management, Emissions, Electronics (source: polarium.com).
Certifications
Polarium is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 14001 — polarium.com
ISO 45001 — polarium.com
ISO 9001 — polarium.com
Trade and customs footprint
Polarium's most recent reported developments include the appointment of Pontus Winberg as chief executive in October 2026 and a partnership with inexogy to deploy smart metered battery storage systems in September 2026. US customs bill-of-lading records list 118 inbound shipments across 33 foreign suppliers, with top origins including Mexico · South Korea · China · Singapore.
Latest developments
2026-10-01 — Pontus Winberg appointed new CEO of Polarium - Polarium (polarium.com)
2026-09-28 — Polarium and inexogy partner to roll out smart metered BESS for value stacking in - Polarium (polarium.com)
2026-08-11 — Polarium sharpens strategic focus after year of transformation - Polarium (polarium.com)
2026-08-02 — Polarium appoints Anass Chaker as Managing Director France, Italy & North Africa - Polarium (polarium.com)
2026-04-22 — RWE and Polarium sign multi-asset tolling to unlock virtual battery from thousands of sites to support renewable integration - Polarium (polarium.com)
2026-03-11 — MFN.se > Polarium Energy Solutions AB > Polarium to Deliver Advanced Energy Storage Solutions for VAROPreem’s Next-Generation Fast Charging Initiative (mfn.se)
Facilities
Polarium is headquartered in Stockholm, Stockholm County. Public sources also reference these locations:
South Africa — polarium.com
Company details
Polarium reports more than 500,000 installations worldwide and serves both business-to-business and business-to-consumer markets. Polarium was founded in 2015, has an estimated 200-500 employees, and is headquartered in Stockholm, Stockholm County. On the LightSource stability read it is rated "Established & active": 11 years in operation (founded 2015). Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Polarium make?
Polarium is a Swedish energy storage company headquartered in Stockholm, founded in 2015 by Stefan Jansson. It has an estimated 200-500 employees and an estimated revenue band of $100-250 million, and it is privately held. The company makes modular lithium-ion battery systems, including power backup, hybrid, standalone, and solar-integrated storage, and serves telecom, commercial, industrial, residential, and EV charging customers. In April 2026 it signed a multi-asset tolling agreement with RWE to aggregate battery capacity from numerous sites to support renewable integration.
Where is Polarium headquartered?
Polarium is headquartered in Stockholm, Stockholm County (3H Solnavaegen, Stockholm, Stockholm County, 113 63).
When was Polarium founded?
Polarium was founded in 2015.
How big is Polarium?
Polarium has an estimated 200-500 employees, with revenue in the $100-250M range (estimated).
What certifications does Polarium hold?
Polarium lists ISO 14001 · ISO 45001 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does Polarium import from overseas suppliers?
US customs bill-of-lading records show 118 inbound shipments for Polarium, with top origins including Mexico · South Korea · China · Singapore.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+46 8 545 440 00
Certification
ISO 14001 · ISO 45001 · ISO 9001
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