ReJoule
ReJoule provides fast, non-invasive battery health diagnostics for electric vehicle and stationary energy storage markets using Electrochemical Impedance Spectroscopy (EIS) hardware and cloud software, serving automakers, battery repurposers, energy storage operators, and battery manufacturers.
- Company typePrivate
- Founded2018
- HeadquartersSignal Hill, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What ReJoule does
ReJoule is a private battery diagnostics company founded in 2018 and headquartered in Signal Hill, California, that provides fast, non-invasive battery health testing for the electric vehicle and stationary energy storage markets. The company’s core technology is Electrochemical Impedance Spectroscopy (EIS), which measures impedance across multiple frequency ranges to assess State of Health (SOH), capturing 42 unique data points and detecting degradation mechanisms including SEI layer growth, charge transfer resistance, and diffusion resistance. EIS-based testing delivers results in approximately five to ten minutes with 98% accuracy, compared to six to twenty-four hours for traditional cycling methods, and works across battery chemistries, form factors, and voltage levels.
The product portfolio centers on the BattScan hardware family—BattScan050M for module-level testing and BattScan500V, a world-first device that performs EIS on high-voltage EV battery packs through the DC Fast Charging port supporting CCS, NACS, and CHAdeMO protocols—paired with the BatteryDB cloud platform for data management, analytics, and API integration. ReJoule also operates in-house battery testing services at its Signal Hill facility covering cell, module, and pack cycling with temperature chambers from -20°C to 50°C, and offers consulting and remanufacturing optimization services. The proprietary battery model library enables precise capacity estimation and supports QR-coded battery identification for traceability across the second-life value chain.
ReJoule operates a B2B enterprise model with custom quote-based pricing and multi-year contracts, targeting automakers, battery repurposers, energy storage operators, battery manufacturers, and aftermarket companies. Named and disclosed customers include SDGE, Renewance, the American Museum of Ceramic Arts, an unnamed top-10 automaker, an unnamed top-5 battery producer, and a leading aftermarket company. Capital has been sourced primarily from non-dilutive government grants—approximately $21.8M cumulatively from the U.S. Department of Energy, California Energy Commission, and National Science Foundation—supplemented by limited angel investment from OpAmp Capital and the San Diego Angel Conference.
ReJoule firmographics
Firmographics- Name
- ReJoule
- Legal name
- ReJoule Incorporated
- Website
- https://rejouleenergy.com
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- ReJoule provides fast, non-invasive battery health diagnostics for electric vehicle and stationary energy storage markets using Electrochemical Impedance Spectroscopy (EIS) hardware and cloud software, serving automakers, battery repurposers, energy storage operators, and battery manufacturers.
- Ownership category
- akta.pro rank
ReJoule industry classification
Industry- Product category
- Battery Diagnostic Equipment
- NAICS
- Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)
- SIC
- Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Testing Laboratories (8734)
- akta.pro primary industry
- Testing, Grading & State-of-Health (SoH) Diagnostics (EOL Assessment, Certification) (EUAFACAH)
- akta.pro secondary industries
- Battery Recycling, Second-Life & Remanufacturing (IMAGAHAL), Battery Second-Life Repurposing & Integration (Stationary Reuse, Repack/Remanufacture) (EUAFACAG), Battery Pack Repair/Remanufacturing & Module/Cell Replacement (TLAKAMAB)
Keywords
Where ReJoule is headquartered
LocationHeadquarters
- HQ city
- Signal Hill
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
ReJoule business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Supply Chain, Operations, Marketing or Sales, Infrastructure
Revenue model
- BattScan Hardware Sales: Sale of BattScan diagnostic devices (BattScan050M, BattScan500V) for battery testing at module, pack, and vehicle level. Hardware is sold as capital equipment to automakers, battery repurposers, and energy storage operators.
- BatteryDB Software/SaaS: Cloud-based BatteryDB platform for battery data management, analytics, and integration. Likely subscription-based access to the platform with API capabilities.
- Battery Testing Services: In-house battery testing services at ReJoule's Signal Hill facility for customers who need testing performed but don't own equipment. Covers cell, module, and pack level testing.
- Consulting Services: Consulting services to help companies maximize value of batteries, including guidance on circular economy solutions for EVs and batteries. They offer white papers and technical presentations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | B2B enterprise pricing - custom quotes |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels7 records
ReJoule product offering
Product offeringCore offering
ReJoule provides fast, non-invasive battery diagnostics for electric vehicle batteries throughout their lifecycle, built on proprietary Electrochemical Impedance Spectroscopy (EIS) technology. Its product portfolio centers on the BattScan hardware family (BattScan050M for module-level testing and BattScan500V for in-vehicle testing through DC Fast Charging ports) paired with the BatteryDB cloud data platform, complemented by in-house testing and consulting services.
Product overview
ReJoule offers a unified hardware-software platform for rapid EV battery diagnostics centered on Electrochemical Impedance Spectroscopy (EIS) technology. The core hardware product family includes BattScan (with BattScan050M for module-level testing and BattScan500V for in-vehicle testing via charging port), while BatteryDB serves as the cloud-based data management platform that processes and stores diagnostic results. The portfolio includes a battery model library for precise capacity estimations, supported by testing services at their Signal Hill facility. Services encompass battery remanufacturing optimization, end-of-line quality control, second-life battery qualification, and consulting. The technology enables 36x faster testing compared to traditional cycling methods, with sub-10 minute test times and over 98% accuracy.
Differentiator
Problem solved
Functional benefit
Brands
- BattScan: Advanced battery diagnostic hardware tool that uses electrochemical impedance spectroscopy (EIS) technology to evaluate battery health in under 10 minutes.
- BatteryDB
Products and services
- BattScan050M Portable module-level battery diagnostic device that uses EIS to deliver State of Health readings in approximately 5 minutes per module with 98% accuracy, capable of testing up to 45 modules per day per technician and supporting batteries up to 500V. Sold to battery repurposers, manufacturers, and fleet operators for rapid grading and remanufacturing.
- BattScan500V World-first in-vehicle battery health testing device that performs EIS on high-voltage EV battery packs directly through the DC Fast Charging port without removing the pack from the vehicle. Supports CCS, NACS, and CHAdeMO protocols and is designed for automakers, fleet operators, and service centers.
- BatteryDB
Quantifiable outcome
- 98% accuracy in 5-minute test (vs 6-24 hour cycling)
- +8 more outcomes
Companies that use ReJoule
Customer profileNamed customers7 records
Segments5 records
Ideal customer profiles4 records
ReJoule technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
ReJoule partnerships and signals
Strategic signalScale indicators12 records
Recent moves6 records
Expansion highlights5 records
ReJoule competitors and assessment
Company assessmentDirect peers
- TWAICE: TWAICE offers a battery analytics software platform that provides predictive analytics, State-of-Health monitoring, and warranty management for EV and stationary storage batteries. It is a direct peer in battery analytics software serving automakers, repurposers, and BESS operators with a data-platform-first approach.
- Aviloo: Aviloo provides independent battery health diagnostics and certificates for used electric vehicles, including plug-in testers used by dealers, fleets, and leasing companies. It is a direct peer in EV battery State-of-Health testing with a similar SaaS/inspection business model targeting the same automaker and reseller customer base.
- Voltaiq: Voltaiq provides enterprise battery intelligence software used by battery manufacturers, EV makers, and grid storage operators to analyze cell, module, and pack performance data. It is a direct peer in battery data analytics and SOH/RUL estimation software for the same enterprise customers ReJoule targets.
- Battery Quick Check (by Cox Automotive): Battery Quick Check provides dealer-facing battery health diagnostic reports for used EVs, supporting trade-in and remarketing workflows. It is a direct competitor in the in-vehicle/dealer-channel battery certification market that ReJoule's BattScan500V targets.
Emerging players
- Element Energy: Element Energy develops battery management and analytics software for fleet operators, including State-of-Health estimation and second-life battery grading tools. It is an emerging player with partial overlap in fleet and second-life battery SOH assessment use cases.
- Eatron Technologies: Eatron develops AI-driven battery management software for OEMs, including State-of-Health estimation and cloud analytics. It is an emerging player with overlapping SOH and battery analytics capabilities, though more focused on embedded BMS software rather than test instrumentation.
Broad incumbents
- Chroma Systems Solutions: Chroma is an established manufacturer of precision test and measurement instrumentation, including battery cyclers, electrochemical analyzers, and automated test systems used by battery labs and manufacturers. It is a broad incumbent selling into the same battery R&D and QA customer base but as part of a wider test-and-measurement portfolio.
- Keysight Technologies: Keysight is a global leader in electronic test and measurement instrumentation, including impedance analyzers used in battery EIS research. It is a broad incumbent whose impedance measurement capabilities underpin many battery diagnostic workflows, though it does not specialize in the EV/second-life battery SOH vertical.
- Bio-Logic Science Instruments (Seyonic): Bio-Logic is a long-established manufacturer of electrochemical impedance spectroscopy (EIS) and potentiostat/galvanostat instruments used in battery and materials research. It is a broad incumbent in EIS instrumentation that competes with ReJoule's core measurement technology for laboratory and OEM R&D use cases.
Others
- Renewance: Renewance is a battery circularity services and advisory firm that helped ReJoule test 1,670 Valence battery modules from electric delivery trucks. It is an ecosystem partner/adjacent services provider in the second-life battery value chain rather than a direct competitor.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks7 records
Key highlights7 records
Customer concentration
ReJoule social profiles
Digital presenceReJoule financial estimates
Financial estimateRevenue estimate
Valuation estimate
ReJoule leadership team
Management profileNumber of profiles
Profiles8 records
ReJoule funding detail
Funding detailFunding overview
Funding rounds11 records
Investors8 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ReJoule M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ReJoule
What does ReJoule do?
ReJoule provides fast, non-invasive battery diagnostics for electric vehicle batteries throughout their lifecycle, built on proprietary Electrochemical Impedance Spectroscopy (EIS) technology. Its product portfolio centers on the BattScan hardware family (BattScan050M for module-level testing and BattScan500V for in-vehicle testing through DC Fast Charging ports) paired with the BatteryDB cloud data platform, complemented by in-house testing and consulting services.
Is ReJoule a public or private company?
ReJoule is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was ReJoule founded?
ReJoule was founded in 2018. It employs 11 to 50 people.
Where is ReJoule based?
ReJoule is headquartered in Signal Hill, United States, in the North America region.
How does ReJoule make money?
Four revenue lines are on record. BattScan Hardware Sales are the primary driver. The others are batteryDB Software/SaaS, battery Testing Services and consulting Services.
Who are ReJoule's main competitors?
Direct peers on record are TWAICE, Aviloo, Voltaiq and Battery Quick Check (by Cox Automotive). Emerging players are Element Energy and Eatron Technologies. Broad incumbents are Chroma Systems Solutions, Keysight Technologies and Bio-Logic Science Instruments (Seyonic). Renewance is listed as an others.
Does ReJoule have an API?
No public API is recorded for ReJoule.
What industry is ReJoule in?
ReJoule's product category is Battery Diagnostic Equipment. Its primary akta.pro industry code is EUAFACAH, Testing, Grading & State-of-Health (SoH) Diagnostics (EOL Assessment, Certification), with a secondary code of IMAGAHAL, Battery Recycling, Second-Life & Remanufacturing. Its NAICS code is 334515 and its SIC code is 3825.