What Rebaba does

Rebaba is a Stockholm-based, for-profit private company founded in 2023 that builds grid-connected energy storage systems using repurposed end-of-life electric vehicle batteries. The company's product, branded Circular Battery Systems, repurpose second-life EV battery packs as stationary storage assets capable of real-time energy supply or absorption for grid stabilization, energy resilience, and integration with solar generation and EV charging stations. By design, the model does not rely on original automotive OEMs for battery supply, positioning Rebaba around circular-economy principles and waste reduction from end-of-life EV fleets.

The company's technical stack pairs repurposed battery modules with control and power conversion technology from Comsys AB and field implementation services from El och Marinteknik. The first disclosed deployment is a grid-connected system in Borås, Sweden, which demonstrates the feasibility of a scalable Swedish second-life battery storage model independent of car manufacturers. Rebaba is also a partner in the Sweden-backed Smartports circular battery value chain initiative (2025-2028), partly funded by Vinnova, which focuses on testing, upcycling, and recycling EV batteries and integrating them with solar and EV charging infrastructure.

Commercially, Rebaba targets energy utilities, grid operators, and municipalities seeking sustainable storage solutions, using a project-based direct delivery model with strategic technology and implementation partners. The company has 1-10 employees, serves Sweden as its sole disclosed market, has not disclosed pricing, revenue, funding rounds, or management team details, and operates with a single core product line. Given the absence of disclosed revenue, the company's economics today appear anchored on grant-funded demonstration activity rather than recurring commercial sales.

Name

Rebaba

Website

https://rebaba.se

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Rebaba is a Stockholm-based company that repurposes end-of-life electric vehicle batteries into grid-connected energy storage systems for utilities, grid operators, and municipalities in Sweden, targeting circular-economy and grid-stabilization use cases.

Ownership category

akta.pro rank

Product category

Grid-Scale Energy Storage Systems

akta.pro primary industry

Battery Second-Life Repurposing & Integration (Stationary Reuse, Repack/Remanufacture) (EUAFACAG)

akta.pro secondary industries

Testing, Grading & State-of-Health (SoH) Diagnostics (EOL Assessment, Certification) (EUAFACAH), Battery Second-Life, Testing & Repurposing (EV-to-Stationary) (EUAIAIAK)

Keywords

• Second-life batteries
• Grid energy storage
• Circular battery systems
• EV battery repurposing
• Stationary battery storage

Headquarters

HQ city

Stockholm

HQ country

Sweden

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Core offering

Rebaba designs and delivers second-life battery systems that repurpose end-of-life electric vehicle batteries into grid-connected energy storage assets. These systems provide real-time energy supply or absorption to stabilize the grid and improve energy resilience, and are deployed in partnership with technology providers and installers for utility, grid operator, and municipal customers.

Product overview

Rebaba offers a single unified product focused on circular battery systems. Their Circular Battery Systems repurpose electric vehicle batteries into grid-connected energy storage assets, working with partners like Comsys AB for control technology and El och Marinteknik for installation. The systems enable grid stabilization through real-time energy supply or absorption, demonstrating scalable second-life battery energy storage without involving original car manufacturers.

Differentiator

Problem solved

Functional benefit

Products and services

• Circular Battery Systems Second-life battery systems that repurpose electric vehicle batteries as grid-connected energy assets, enabling real-time energy supply or absorption to enhance grid stability for utilities, grid operators, and municipalities.

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Three partnerships are on record, tiered core and minor.

• SmartportscoreStrategic or Co-development Partner · 1 January 2025Sweden-backed initiative (2025-2028) to develop a circular battery value chain, funded partly by Vinnova. The project focuses on testing, upcycling, and recycling EV batteries, integrating them into solar and EV charging stations to position Sweden as an innovative European hub for circular battery technology.
• Comsys ABcoreTechnology or IntegrationComsys AB provided control technology for the second-life battery system installed in Borås, Sweden. Their power conversion technology powers the grid-connected energy asset, enabling real-time energy supply or absorption for grid stabilization.
• El och MarinteknikminorImplementation/ SI/ Consulting PartnerCollaborated with Rebaba on the installation of the second-life battery system in Borås, providing technical expertise for the sustainable energy project.

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Northvolt: Swedish battery manufacturer with circular/second-life initiatives (e.g., Revolt recycling). Operates in adjacent vertical and is geographically comparable, but offers a much broader battery value chain spanning cell manufacturing, recycling, and energy storage, not specializing solely in second-life systems like Rebaba.
• Volvo Energy: Volvo Group's business unit for second-life batteries, battery repurposing, and charging infrastructure in Sweden and Europe. Comparable in Swedish geography and EV-battery second-life focus, but operates as a captive OEM-led initiative rather than an independent integrator like Rebaba.
• Stiesdal Energy Technologies: Danish energy technology developer focused on grid-scale energy storage and renewable integration. Comparable end customer (utilities/grid) and stationary storage offering, though not specializing in second-life EV batteries specifically.

Direct peers

• B2U Storage Solutions: US-based operator of large-scale second-life battery energy storage facilities (Sierra storage project). Closely matches Rebaba's core activity — repurposing EV packs into grid-scale stationary storage — though at materially larger scale.
• BatteryLoop: Swedish company specializing in second-life EV battery energy storage for commercial and industrial customers. Closely comparable to Rebaba in geography, target use case (grid and behind-the-meter storage), and circular-economy positioning.
• Connected Energy: UK-based specialist in repurposing second-life EV batteries into stationary grid-connected storage (e.g., E-STOR systems). Directly comparable business model, target customer (utilities, EV charging, renewables), and technology to Rebaba.
• 4R Energy Corporation: Joint venture between Nissan and Sumitomo focused on repurposing Nissan Leaf EV batteries into stationary and industrial storage. Direct comparable in second-life EV-to-stationary use cases, though it is OEM-tied (Nissan) versus Rebaba's OEM-independent model.

Emerging players

• Smartville: US startup developing second-life battery solutions for stationary storage, including diagnostics and repurposing platforms. Comparable technology and use cases (EV-to-stationary) but smaller and earlier-stage than Rebaba's European reference projects.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds2 records

Investors6 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 Rebaba