Polarium

What Polarium does

Polarium is a Swedish energy storage company founded in 2015 and headquartered in Stockholm that designs, manufactures, and operates modular lithium-ion battery systems for four primary segments: telecom backup power, commercial and industrial (C&I) sites, EV charging infrastructure, and residential customers. The product portfolio centers on the foundational Polarium Battery module, the scalable Polarium Battery Energy Storage System (BESS) for C&I applications, and the HomeBattery (Homevolt) all-in-one residential system with integrated hybrid inverter, supported by cloud-based Fleet Management software, an Anti-Theft module, and the Polarium Care operational services offering. The company has deployed more than 540,000 batteries across roughly 80 countries, with manufacturing facilities in Vietnam, South Africa and Mexico.

Underlying technology includes a proprietary Battery Management System (BMS), a patented Current Limiting Device (CLD), the Polarium Cloud platform for remote monitoring and over-the-air updates, an Edge Connectivity layer for low-latency local control, and AI-driven energy optimization that factors spot prices, demand charges, solar production forecasts, and household consumption patterns. Polarium achieved unicorn status in 2022 at a $1B+ valuation on the back of a 106% revenue surge, but 2023 saw a 48% revenue decline attributed to customer-concentration, elongated sales cycles, and inventory issues; a new strategic plan and CEO transition followed in mid-2024.

The company monetizes primarily through hardware sales of battery systems to enterprise customers via direct field sales, supplemented by channel partner distribution (notably KP Energy for Nordic residential), Battery-as-a-Service (BaaS) leasing through the acquired Stella Futura entity, recurring operational services, and emerging grid-services revenue from aggregating distributed assets into virtual power plants (notably under the RWE multi-asset tolling partnership announced in April 2026). Pricing is quote-based for enterprise and C&I, with a goal of opening the residential segment through integrated product offerings and partner-led distribution. Major institutional shareholders include AMF and Alecta, and the company has raised multiple funding rounds since 2022.

Name

Polarium

Legal name

Polarium Energy Solutions AB

Website

https://polarium.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

251–500 employees

Short description

Polarium is a Swedish energy storage company that designs modular lithium-ion battery systems and cloud-based fleet management software for telecom, commercial, EV charging, and residential customers across roughly 80 countries.

Ownership category

akta.pro rank

Product category

Battery Energy Storage Systems

NAICS

Battery Manufacturing (335910), Battery Manufacturing (33591), Electrical Equipment Manufacturing (33531)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Battery Pack Manufacturing & Module Assembly (EUAFABAI)

akta.pro secondary industries

Battery Management Systems (BMS) & Battery Electronics (IMAGAHAC), Battery Management Systems (BMS) & Safety Controls (EUAFAAAD), Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)

Keywords

• Battery energy storage
• Lithium-ion batteries
• Telecom backup power
• Commercial energy storage
• Residential battery systems

Headquarters

HQ city

Stockholm

HQ country

Sweden

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Battery Hardware Sales: Sale of modular lithium-ion batteries (Polarium Battery, Polarium Battery Energy Storage System) for telecom backup, C&I energy storage, and residential applications. One-time hardware purchase with modular expansion capability.
2. Energy Storage System Solutions: Complete BESS solutions including hardware, installation, and integration services for commercial, industrial, and utility-scale applications.
3. Battery-as-a-Service (BaaS): Flexible financial solutions including battery leasing and BaaS models to support broad range of customer energy storage needs, particularly for C&I segment through Stella Futura.
4. Operational Services: Ongoing services including installation, operation, maintenance, monitoring, protecting and control of battery systems to ensure continuous performance.
5. Grid Services and Flexibility Markets: Revenue generation through participation in ancillary services, demand response programs, and flexibility markets by aggregating distributed batteries into virtual power plants.

Pricing tiers

Go-to-market motion4 records

Distribution channels5 records

Marketing channels6 records

Core offering

Polarium develops and manufactures modular lithium-ion battery energy storage systems with proprietary Battery Management System (BMS), cloud-based fleet management, and AI-driven energy optimization software. The product portfolio serves telecom operators, commercial and industrial facilities, EV charging infrastructure, and residential customers, with hardware manufactured in Vietnam, South Africa, and Mexico and sold globally in 80+ countries.

Product overview

Polarium develops smart battery management and storage solutions built on lithium-ion technology, offered as a modular platform architecture. The core product portfolio centers on three main battery systems: (1) Polarium Battery as the foundational lithium-ion module for reserve power applications; (2) Polarium Battery Energy Storage System (BESS) as a scalable commercial/industrial energy storage and optimization solution; and (3) Polarium HomeBattery (Homevolt) as an all-in-one residential system with integrated inverter and AI optimization. These are enhanced by software modules including Fleet Management for distributed asset orchestration, Anti-Theft protection, and Polarium Care operational services. The platform is unified by Polarium Cloud, providing connectivity, remote management, and smart services across all products.

Differentiator

Problem solved

Functional benefit

Brands

• Homevolt: Consumer battery for home energy storage combining cutting-edge technology with AI-driven software that optimizes energy consumption based on real-time electricity prices. Features integrated inverter and modular design for outdoor installation.
• Polarium HomeBattery
• Polarium Battery
• Polarium Battery Energy Storage System
• Polarium Fleet Management
• Polarium Anti Theft
• Polarium Care
• Polarium X
• Battery-as-a-Service (BaaS)

Products and services

• Polarium Battery Intelligent, connected, and robust lithium-ion battery module serving as the core of Polarium's product range. Can be used standalone for reserve power or as the foundation for other Polarium products. Features patented Current Limiting Device (CLD) for safety and optimized charging. Targeted at telecom operators for backup power applications.
• Polarium Battery Energy Storage System (BESS) Modular energy storage and optimization system for commercial and industrial applications. Scalable pre-assembled BESS with intelligent Fleet Management that stores energy efficiently and releases it when grid services are most needed. Enables participation in ancillary service markets while reducing peak demand costs. Targeted at C&I facilities, EV charging infrastructure, and virtual power plant aggregation.
• Polarium HomeBattery (Homevolt) Revolutionary all-in-one residential energy storage system combining cutting-edge battery technology with AI-driven software. Features integrated hybrid inverter, solar optimization with wide voltage window, and operates reliably in temperatures from -20°C to +45°C. Optimizes energy consumption based on real-time electricity prices and household patterns. Distributed through KP Energy's Nordic network and select partners.
• Battery-as-a-Service (BaaS) Flexible financial solution for battery leasing offered through Stella Futura to support energy storage needs for commercial and industrial clients. Lowers upfront capital requirements and provides monthly subscription-based access to BESS hardware, system design, and project development services.

Quantifiable outcome

• 106% sales growth in 2022 reaching SEK 2.2 billion revenue
• +6 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability5 records

Feature8 records

Partnerships

Eight partnerships are on record, tiered core and supporting.

• RWEcoreStrategic or Co-development Partner · 22 April 2026Multi-asset tolling partnership to aggregate 1,600+ distributed batteries into 50MW/135MWh virtual power plant in Germany for grid services and renewable integration. From late 2026, RWE will optimize Polarium's distributed battery portfolio for real-time grid control and market participation. Long-term plans to scale to 10,000 batteries and 300MW/810MWh.
• FLEXECHARGEsupportingTechnology or Integration · 20 April 2026Integration partnership using FLEXECHARGE's Energy Management Platform to integrate Polarium's BESS into Recharge's charging network. Platform standardizes communication and enables Polarium BESS to serve multiple applications including peak shaving, power boosting, arbitrage, and flexibility market participation.
• Näst Energy Lab / Buddy Energy / Volvo Cars / Vectura / StepturasupportingStrategic or Co-development Partner · 16 April 2026Collaboration within Näst Innovation Destination Torslanda for one of Europe's largest vehicle-to-grid installations. Polarium contributes large-scale BESS for local energy optimization. Project integrates buildings, stationary storage, charging infrastructure, and up to 160 connected EVs.
• VAROPreemcoreStrategic or Co-development Partner · 11 March 2026Strategic partnership to provide intelligent energy storage solutions enabling efficient and scalable fast charging at VAROPreem service stations across Sweden. Polarium's BESS with EMS functionality delivers high-power charging where grid connections are limited. Supports VAROPreem's EV infrastructure expansion for heavy and light vehicles.
• GreenelycoreStrategic or Co-development Partner · 18 December 2025Strategic partnership to develop new battery solutions and consumer offerings for households. Combines Polarium's energy storage with Greenely's energy management platform, hourly electricity tariffs, and VPP technology. First initiatives planned for introduction from 2026 onwards.
• KP EnergycoreChannel Partner/ Reseller/ Distributor · 18 June 2025Nordic distribution partnership where KP Energy distributes Polarium Home to its key partners throughout the Nordics. KP Energy is one of Nordic region's foremost wholesalers in solar energy, EV charging, and energy storage, supplying hundreds of resellers.
• Stella FuturacoreStrategic or Co-development Partner · 4 June 2025Acquisition of Stella Futura, a prominent Nordic BESS developer, combining Polarium's modular technology with Stella Futura's system design, project development, and EPC services. Creates fully integrated platform for C&I sectors with goal of installing 100 MW capacity in Northern/Central Europe within 18 months.
• NefabsupportingStrategic or Co-development Partner · 22 November 2024Partnership for fiber-based sustainable battery packaging. Won three Gold Pack Awards for innovative packaging replacing polystyrene with recyclable corrugated materials. Nefab and Mpact Limited produce and deliver packaging in Africa.

Scale indicators16 records

Recent moves8 records

Expansion highlights7 records

Direct peers

• Tesla Energy (Megapack / Powerwall): Tesla's energy business manufactures the Megapack grid-scale BESS and the Powerwall residential battery, directly competing with Polarium across both C&I/utility-scale and residential segments. Both companies offer integrated hardware plus software/fleet management with VPP capability.
• Fluence Energy: Fluence is a pure-play grid-scale BESS provider with deep utility-customer relationships and a software stack (Nispera) for fleet optimization, making it a direct competitor to Polarium's BESS and VPP offering in C&I and utility markets globally.
• Vertiv: Vertiv supplies power and thermal management for telecom and data centers, including DC and lithium backup power systems. It is one of the closest direct competitors to Polarium's core telecom backup battery business and shares the same enterprise customer base.
• EnerSys: EnerSys is a global industrial battery manufacturer with strong positions in telecom backup, motive power, and grid energy storage. Its lithium-ion product lines directly overlap with Polarium's modular battery and BESS offerings for telecom and C&I customers.
• Saft (TotalEnergies): Saft manufactures industrial lithium-ion batteries, including telecom backup and grid-scale storage systems, and is a direct competitor in Polarium's core telecom and C&I segments, with similar safety and energy-density requirements.
• Enphase Energy: Enphase's IQ Battery and solar-plus-storage ecosystem directly competes with Polarium HomeBattery/Homevolt in the residential segment. Both companies emphasize modular architecture, integrated inverters, and software-driven energy optimization for homeowners.
• Sonnen (Shell): Sonnen is a leading residential and small-commercial BESS brand owned by Shell, with strong European and VPP positioning. It competes head-to-head with Polarium HomeBattery in design, smart-home energy management, and grid services integration.
• Pylontech: Pylontech is a major Chinese LFP battery manufacturer serving residential, C&I, and telecom backup markets globally, with strong cost position. Its product overlap and global distribution make it a direct competitor to Polarium's modular battery and BESS portfolio.

Broad incumbents

• BYD: BYD is a vertically integrated battery and EV powerhouse with a large stationary storage business (Battery-Box for residential, large-scale BESS projects) and significant cost advantage from in-house cell production, competing with Polarium across all segments.
• Sungrow: Sungrow is a major global inverter and BESS manufacturer with utility-scale and C&I storage products. Its broad portfolio, large installed base, and strong EPC integration make it a broad incumbent competitor to Polarium's BESS and EV charging storage offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/PolariumEnergy
• YouTubeyoutube.com/c/polarium
• Facebookfacebook.com/PolariumEnergy
• LinkedInlinkedin.com/company/polariumenergy
• Instagraminstagram.com/PolariumEnergy

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds8 records

Investors7 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Polarium