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Second-Life Electric Vehicle Battery Marketplace for Commercial and Industrial Storage
Market and business model assessment as of August 19, 2026
Used electric vehicle batteries are moving toward a major supply wave. At the same time, commercial and industrial customers need storage to reduce demand charges, support electric vehicle charging, and provide backup power.
The opportunity is clear: build a trusted marketplace that sells certified energy performance, not untested used batteries.
The marketplace would connect:
- Fleets, vehicle repair centers, original equipment manufacturers, and recyclers with retired battery packs
- Battery testing and repurposing companies
- Commercial and industrial storage integrators
- Insurance companies, lenders, and project developers
- Businesses that need lower-cost behind-the-meter storage
The winning company will not simply match buyers and sellers. It will create the missing trust and financing layer through standard testing, digital records, performance warranties, and independent certification.
Executive conclusion
A second-life battery marketplace is commercially attractive, but the timing matters.
- The first large retirement wave from electric vehicle batteries will grow through the mid-2030s.
- A single cohort of approximately 1.5 million United States electric vehicle sales could eventually produce roughly 30 to 60 gigawatt-hours of usable second-life battery supply, depending on retirement age, remaining capacity, safety screening, and repurposing yield.
- The United States has nearly 5 million commercial customers on tariffs with demand charges above $15 per kilowatt, according to a National Renewable Energy Laboratory survey. (research-hub.nrel.gov)
- Even a 1 percent adoption rate among those customers could represent approximately 50 gigawatt-hours of storage demand if the average system size is one megawatt-hour.
- The largest barriers are not battery supply alone. They are battery data access, testing consistency, system certification, traceability, warranty design, and debt financing.
- The first pilot should use one fleet, one battery family, and one storage integrator. Mixed chemistries and open marketplace trading should come later.
Why this market is forming now
Electric vehicle battery supply is becoming large
Global electric car sales exceeded 20 million in 2025. Global electric vehicle battery deployment reached approximately 1.2 terawatt-hours in 2025 and is expected to approach 3 terawatt-hours by 2030 under current policy and market scenarios. (iea.org)
The United States sold approximately 1.5 million electric cars in 2025. The average battery size for a United States battery electric vehicle reached about 90 kilowatt-hours. (iea.org)
These batteries do not become worthless when they leave a vehicle. Many still hold 70 to 80 percent of their original energy capacity. They may no longer meet vehicle range or power needs, but stationary storage is usually less demanding. (ul.com)
Battery failure is also not the main source of future supply. Battery replacements due to failure were reported at only 1.5 percent across a large sample of model years 2011 through 2023, and below 1 percent for many vehicles from model years 2016 through 2023. Most future second-life supply will come from vehicles reaching the end of their economic or physical life, not from batteries that suddenly fail. (energy.gov)
Commercial and industrial customers need peak power
Demand charges are based on a customer’s highest measured power use, usually during a billing period. A battery can discharge during a short peak and reduce the customer’s billed demand.
The Energy Information Administration identifies reducing end-user demand and demand charges as one of the main uses of energy storage for commercial and industrial customers. (eia.gov)
For example, a business that reduces its monthly peak by 500 kilowatts on a tariff with a $15-per-kilowatt demand charge could avoid:
500 kilowatts × $15 × 12 months = $90,000 per year
This does not include savings from energy price shifting, backup power, demand response programs, or reduced electric vehicle charging costs.
The Department of Energy has also identified 50- to 300-kilowatt-hour battery systems as useful for reducing demand charges at direct-current fast-charging locations. (afdc.energy.gov)
This creates a strong first market for second-life batteries:
- Fleet charging depots
- Warehouses
- Cold storage facilities
- Manufacturing plants
- Retail centers
- Data centers
- Agricultural facilities
- Schools and public buildings
- Electric vehicle charging hubs
Market size using retirement curves
A credible market estimate should separate battery supply from storage demand. These are different markets with different timing.
Planning assumptions
The following model is not a published forecast. It is a transparent planning model that can be updated as better fleet data becomes available.
| Input | Planning assumption |
|---|---|
| United States electric car sales in 2025 | 1.5 million |
| Share treated as battery electric vehicles | 80% |
| Average battery size | 90 kilowatt-hours |
| Remaining capacity at vehicle retirement | 70% to 80% |
| Packs passing safety and economic screening | 40% to 70% |
| Average commercial and industrial storage system | 1 megawatt-hour |
| Example installed storage value | $250 to $400 per usable kilowatt-hour |
The 80 percent battery electric vehicle share, screening yield, average storage size, and installed cost are modeling assumptions. They should be replaced with actual fleet and integrator data during the pilot.
Retirement curve
The Department of Energy estimates that modern electric vehicle batteries may last approximately 12 to 15 years in moderate climates and 8 to 12 years in extreme climates. Climate, charging behavior, battery chemistry, thermal management, and vehicle use all affect battery life. (afdc.energy.gov)
A marketplace should therefore use a retirement probability curve, not a single retirement year.
A practical starting curve could look like this:
| Vehicle age | Share of a cohort reaching end of automotive use |
|---|---|
| 8 years | 10% |
| 10 years | 25% cumulative |
| 12 years | 50% cumulative |
| 15 years | 80% cumulative |
| 18 years | 95% cumulative |
| 20 years | 100% cumulative |
This curve is a starting assumption. A fleet may retire batteries earlier because of range requirements, accident damage, warranty rules, vehicle replacement, or changes in route duty. Another fleet may keep vehicles and batteries in service much longer.
Battery supply from one United States sales cohort
Using the 2025 United States sales cohort:
1.5 million vehicles × 80% battery electric vehicles × 90 kilowatt-hours
= 108 gigawatt-hours of original battery capacity
If those packs reach retirement with 70 to 80 percent of their original capacity, they contain approximately 76 to 86 gigawatt-hours of remaining energy.
If 40 to 70 percent pass safety, cost, and application screening, the usable second-life opportunity from this one cohort is approximately:
30 to 60 gigawatt-hours
This supply would arrive over several years, not all at once. If distributed across four to six retirement years, the cohort could provide roughly 5 to 15 gigawatt-hours per year for second-life use.
This is a planning estimate, not a guaranteed supply forecast. Actual results will depend on:
- Vehicle retirement age
- Pack damage and accident history
- Access to battery management system records
- Battery chemistry
- Pack repair cost
- Transportation cost
- Testing yield
- Competition from recycling
- Prices for new stationary batteries
Commercial and industrial storage demand
The National Renewable Energy Laboratory identified nearly 5 million United States commercial customers that could subscribe to tariffs with demand charges above $15 per kilowatt. The original survey was published in 2017, but the underlying tariff dataset was updated in 2024. (research-hub.nrel.gov)
Applying simple adoption scenarios:
| Adoption of qualifying customers | Number of sites | Assumed average system | Potential storage demand |
|---|---|---|---|
| 1% | 50,000 | 1 megawatt-hour | 50 gigawatt-hours |
| 5% | 250,000 | 1 megawatt-hour | 250 gigawatt-hours |
| 10% | 500,000 | 1 megawatt-hour | 500 gigawatt-hours |
At an illustrative installed value of $250 to $400 per usable kilowatt-hour, this represents:
| Adoption case | Illustrative cumulative market value |
|---|---|
| 1% | $12.5 billion to $20 billion |
| 5% | $62.5 billion to $100 billion |
| 10% | $125 billion to $200 billion |
These figures are cumulative opportunity estimates, not annual revenue forecasts. They include equipment, power conversion, controls, installation, commissioning, and service.
The key market insight is that commercial and industrial demand could be much larger than near-term second-life battery supply. This gives a marketplace room to work with multiple sources, including retired electric vehicle batteries, new batteries, factory overstock, and refurbished modules.
What the marketplace should sell
The marketplace should not list a battery as “used” or “80 percent healthy.” That language is too vague for a lender, insurer, or commercial customer.
Each listing should contain a standardized battery performance certificate.
Required battery record
Every pack should have a permanent digital record containing:
- Battery manufacturer
- Vehicle manufacturer and model
- Battery chemistry
- Pack, module, and cell identifiers
- Manufacturing date
- Vehicle identification number, where available
- Vehicle mileage and operating hours
- Climate and location history
- Charging history
- Direct-current fast-charging exposure
- Maximum and minimum state of charge history
- Previous repairs
- Accident, flood, fire, or thermal event history
- Recall status
- Warranty status
- Date removed from the vehicle
- Ownership and title history
- Transport and storage records
- Recycling or final disposition plan
The National Institute of Standards and Technology identifies battery traceability and battery passports as important tools for managing battery reuse and recycling. It also highlights the need to track information throughout a battery’s life. (nist.gov)
Marketplace battery grades
The marketplace could use its own commercial grades. These should not be confused with official Underwriters Laboratories grades.
Grade A: High-value stationary storage
- Strong remaining energy capacity
- Good power capability
- Low cell imbalance
- Complete usage history
- Suitable for two- to four-hour commercial and industrial storage
Grade B: Lower-power stationary storage
- Lower power capability or greater capacity variation
- Suitable for longer-duration backup, solar shifting, or low-rate applications
- May require more conservative operating limits
Grade C: Component recovery
- Not suitable for complete system use
- May contain usable modules or cells
- Sent to a controlled repair or recycling pathway
The listing should show measured usable energy, not only original nameplate capacity.
Proposed testing and certification standard
The marketplace should build on existing standards rather than create a competing safety system.
Existing standards
ANSI/CAN/UL 1974:2023 covers the sorting and grading of used battery packs, modules, and cells intended for repurposing or remanufacturing. It was published on November 10, 2023. (webstore.ansi.org)
UL 1973 applies to batteries used in stationary applications.
UL 9540 applies to complete energy storage systems.
UL 9540A provides a test method for evaluating thermal runaway and fire propagation at the cell, module, unit, and installation levels. (ul.com)
National Fire Protection Association 855 covers installation, commissioning, operation, maintenance, and decommissioning of stationary energy storage systems. The 2026 edition includes specific chapters for electrochemical storage and lithium-ion battery storage. (link.nfpa.org)
The 2024 International Fire Code states that batteries previously used for electric vehicle propulsion cannot be reused in covered energy storage applications unless approved by the fire code official and refurbished by a company approved under UL 1974. (codes.iccsafe.org)
IEEE 2993-2025 provides a recommended practice for designing energy storage systems using second-life electric vehicle batteries at voltage levels of 10 kilovolts and below. (standards.ieee.org)
Proposed testing workflow
| Stage | Main tests | Marketplace output |
|---|---|---|
| 1. Ownership and traceability | Title, identifiers, recalls, accident history | Chain-of-custody record |
| 2. Visual and safety inspection | Damage, swelling, leakage, corrosion, insulation | Safety screen |
| 3. Electrical testing | Capacity, power, resistance, self-discharge, isolation | Measured performance |
| 4. Battery management system review | Fault history, temperature data, cell voltage data | First-life health record |
| 5. Thermal and fire evaluation | Thermal behavior, gas release, propagation risk | Safety and installation data |
| 6. Application matching | Power, energy, temperature, duty cycle | Approved use cases |
| 7. System commissioning | Power conversion, controls, alarms, response | System acceptance certificate |
| 8. In-field monitoring | Capacity tests, temperature, alarms, energy throughput | Warranty and lender reporting |
A strong certificate should report:
- Usable energy at a defined temperature
- Continuous power
- Short-duration peak power
- Round-trip efficiency
- Cell voltage spread
- Temperature spread
- Insulation resistance
- Maximum operating temperature
- Allowed state-of-charge range
- Equivalent full cycles
- Expected degradation
- Prediction confidence range
- Recommended application
- Required inspection interval
- End-of-life trigger
The major improvement is to report uncertainty. A certificate should say, for example:
“The pack has 61 kilowatt-hours of usable energy at 25 degrees Celsius, with a measurement uncertainty of plus or minus 1.5 kilowatt-hours.”
That is much more useful than saying the battery is “about 80 percent healthy.”
Warranty and performance certification
The marketplace should make warranties simple enough for a business owner and detailed enough for a lender.
Recommended initial warranty structure
For the first commercial pilot, the marketplace could offer:
- Five-year capacity warranty
- Minimum end-of-warranty usable capacity floor
- Guaranteed system availability
- Guaranteed energy throughput
- Defined operating temperature and state-of-charge limits
- Replacement or derating remedy
- Service response time
- Fire and product liability coverage
- Transferable warranty for the remaining system life
- Defined recycling responsibility
The capacity floor should be based on certified starting usable energy, not original vehicle capacity.
For example, a battery system certified at 1,000 usable kilowatt-hours could have a contract capacity floor of 700 to 800 usable kilowatt-hours at the end of the warranty period. The exact level should be based on measured degradation data and the planned operating profile.
Some existing companies show that longer warranties and financing models are possible. Smartville publicly lists a ten-year warranty and 3,000-cycle specification for one system. Connected Energy offers leasing, battery storage as a service, battery replacement terms, and availability guarantees. B2U advertises insurance-backed performance warranties and financing options. These are company-reported terms, not a universal market standard. (smartville.io)
The marketplace should standardize the contract language so buyers can compare systems from different suppliers.
Comparison with existing programs
| Company or program | Current approach | Strength | Marketplace gap |
|---|---|---|---|
| Nissan and 4R Energy | Grades used batteries for vehicle, industrial, stationary, or backup uses | Long operating history and original equipment manufacturer knowledge | Primarily an original equipment manufacturer-controlled ecosystem |
| Mercedes-Benz Energy | Uses vehicle batteries in large stationary systems and factory storage | Strong integration with vehicle battery design and large projects | Limited access to batteries from other manufacturers |
| Renault and Connected Energy | Uses Renault batteries in commercial storage systems and offers leasing and storage as a service | Commercial operating experience and financing options | Mostly a closed or partner-based supply chain |
| B2U Storage Solutions | Places used electric vehicle packs into grid-connected storage cabinets | Direct pack-to-cabinet model, performance guarantees, and insurance claims | Proprietary system and limited neutral marketplace access |
| Smartville | Integrates packs from multiple manufacturers using its own controls and battery management system | Multi-manufacturer integration and public demonstration projects | Still requires project-by-project integration and certification |
| Moment Energy | Develops battery management systems for repurposed electric vehicle batteries | Focus on the safety and control gap | Recent certification and limited long-term operating history |
Nissan’s 4R Energy model uses different grades for different applications and reports approximately 10 to 15 years of additional life for some recovered batteries. (nissan-global.com) Mercedes-Benz reports stationary projects, including a 1,400-kilowatt-hour factory system and a planned project exceeding 5 megawatt-hours at an airport. (group.mercedes-benz.com)
Smartville has demonstrated a system combining packs from different manufacturers and has received Department of Energy support for multi-state second-life storage demonstrations. (smartville.io) Moment Energy announced in 2026 that its battery management system had been recognized as a component for UL 1973 and that it was building a broader UL compliance framework. That announcement should be independently verified during commercial due diligence. (momentenergy.com)
The open market gap is therefore not a total lack of solutions. The gap is a neutral, comparable, finance-ready standard across multiple suppliers and battery families.
The main industry gaps
1. Battery data is often unavailable
Repurposers may not receive complete battery management system data from the original vehicle manufacturer. Without first-life data, testing becomes more expensive and degradation predictions become less accurate.
This is one of the most important policy and business gaps identified by the American Council for an Energy-Efficient Economy and the National Institute of Standards and Technology. (aceee.org)
2. A safety standard is not the same as a performance standard
UL 1974 helps define the repurposing process. It does not create a universal marketplace rating for:
- Usable kilowatt-hours
- Remaining useful life
- Energy throughput
- Power fade
- Warranty value
- Residual value
The marketplace should fill this gap with measured, repeatable performance data.
3. Different battery packs are difficult to combine
Packs differ in:
- Voltage
- Chemistry
- Cooling method
- Communication protocol
- Cell format
- Power limits
- State-of-charge range
- Battery management system design
A marketplace should initially avoid mixing unrelated battery families in the same system. It should begin with one battery platform and expand only after the control system has been validated.
4. Financing is difficult without a warranty backstop
The Department of Energy Loan Programs Office identifies lack of debt financing, perceived technical risk, and unpredictable cash flows as major barriers for newer storage technologies. (energy.gov)
A lender will ask:
- Who owns the battery?
- Who replaces a failed pack?
- What happens if the repurposer closes?
- Is the warranty transferable?
- Is the system insured?
- What is the liquidation value?
- Who pays for removal and recycling?
- How accurate is the degradation model?
The marketplace must answer these questions in the sale contract.
5. Permitting is local and inconsistent
A system may satisfy a technical test and still face delays from a local fire code official, utility, or building department. The marketplace should provide a complete permitting package with:
- UL certification records
- UL 9540A results
- Battery performance data
- Fire safety plan
- Emergency response plan
- Site layout
- Ventilation and detection design
- Commissioning report
- Decommissioning plan
Financing models to test
The marketplace should test several structures instead of assuming customers will buy batteries outright.
Direct sale
The customer buys the system and receives:
- Five- to ten-year warranty
- Operations and maintenance contract
- Capacity and availability guarantee
- Optional replacement reserve
This is simplest but may require the customer to provide more capital.
Lease
The customer pays a fixed monthly amount. The provider owns the system and retains the residual value.
This model may work well for small and medium commercial customers.
Battery storage as a service
The provider owns, operates, maintains, and warranties the system. The customer pays for guaranteed availability or shared savings.
Connected Energy already advertises a battery storage as a service model that includes installation, software, maintenance, warranty, replacement parts, and availability guarantees. (connected-energy.co.uk)
Energy-throughput contract
The customer pays for delivered energy or avoided peak demand. The contract includes a capacity floor and a replacement obligation.
This is attractive because it changes the customer’s purchase from:
“Buy a used battery.”
to:
“Pay for dependable peak-shaving capacity.”
Tax credit and depreciation review
United States energy storage placed in service after December 31, 2024 may qualify for the Clean Electricity Investment Credit under Section 48E. The base credit is 6 percent, increasing to as much as 30 percent when prevailing wage and apprenticeship rules are met. The credit may also be transferable or available through elective pay for eligible entities. (irs.gov)
Domestic content, energy community, prohibited foreign entity, original-use, related-party, and used-equipment rules can affect project eligibility. A second-life storage project should not include a tax credit in its financial model until tax counsel confirms the treatment.
Validation plan: one fleet and one storage integrator
The proposed marketplace should be validated through a controlled commercial trial.
Fleet partner
Select one fleet with:
- At least 50 retired or replacement battery packs
- One or two battery families
- Complete vehicle mileage and charging records
- Known operating locations and climate
- Permission to share battery management system data
- A defined retirement and recycling process
Good candidates include:
- Delivery fleets
- Transit bus fleets
- Municipal fleets
- Rental vehicle fleets
- Airport vehicles
- Utility service fleets
The fleet should provide the packs at the point of vehicle removal, before they are mixed with unknown inventory.
Storage integrator
Select one commercial and industrial storage integrator that already has:
- A listed power conversion system
- Energy management software
- Demand-charge control capability
- Fire and safety engineering experience
- Utility interconnection experience
- A commercial customer willing to host the pilot
The first system could be:
- 250 to 500 kilowatts of power
- 1 to 2 megawatt-hours of usable energy
- Located at a fleet depot or commercial facility
- Connected to solar, electric vehicle charging, or both
Trial phases
Phase 1: Data and inspection
Duration: 8 to 12 weeks.
Tasks:
- Collect all available first-life data
- Complete ownership and recall checks
- Inspect and photograph each pack
- Perform electrical and insulation tests
- Assign preliminary grades
- Compare battery management system estimates with measured capacity
Phase 2: Controlled testing
Duration: 8 to 12 weeks.
Tasks:
- Measure usable capacity
- Measure power capability
- Test cell and temperature balance
- Establish safe operating limits
- Run accelerated cycling
- Train the degradation model
- Reject unsafe or uneconomic packs
Phase 3: Field deployment
Duration: 12 to 18 months.
Tasks:
- Dispatch the system for demand-charge reduction
- Record energy throughput and operating temperature
- Perform monthly or quarterly capacity checks
- Compare predicted and measured degradation
- Track customer savings
- Collect lender, insurer, and permitting feedback
Pilot success metrics
| Metric | Measurement | Suggested scale-up target |
|---|---|---|
| Usable energy | Measured alternating-current megawatt-hours | At least 90% of certified starting value at commissioning |
| System availability | Hours available for dispatch | At least 95% |
| Degradation prediction | Predicted versus measured capacity | Mean error of 3 to 5 percentage points after 12 months |
| Prediction confidence | Actual results inside forecast range | At least 90% coverage |
| Pack rejection rate | Packs rejected after full testing | Track by battery model and cause |
| Round-trip efficiency | Energy delivered compared with energy charged | Establish model-specific baseline |
| Thermal performance | Cell and pack temperature spread | No unsafe excursions |
| Demand-charge savings | Actual utility bill reduction | Within 10% of the financial model |
| Warranty cost | Replacements, service, and reserve use | Establish a reliable reserve rate |
| Financing | Loan term, interest rate, equity, and reserve | Obtain at least three financeable term sheets |
| Marketplace efficiency | Time from intake to approved listing | Reduce with each battery model |
The most important technical metric is not initial capacity. It is degradation prediction accuracy. A buyer can manage a battery that slowly declines. A buyer cannot easily manage a battery whose remaining life is unknown.
Recommended launch strategy
First six months
- Choose one battery family
- Sign one fleet and one storage integrator
- Build the digital battery record
- Align the testing process with ANSI/CAN/UL 1974:2023
- Select an independent testing laboratory
- Establish the first warranty form
- Create a pack-level chain-of-custody process
Months six through twelve
- Complete controlled testing
- Deploy a 1- to 2-megawatt-hour commercial system
- Measure demand-charge savings
- Train the degradation model
- Collect financing term sheets
- Complete permitting and insurer review
- Publish anonymized performance data
Year two
- Add a second battery family
- Add a second fleet source
- Introduce battery storage as a service
- Create an insurer-backed warranty pool
- Offer a standardized lender data room
- Expand into electric vehicle charging depots and industrial facilities
The company should begin as a closed-loop marketplace, not a completely open exchange. A controlled supply chain makes it easier to verify ownership, collect battery history, manage transportation, and support warranties.
Final assessment
The second-life electric vehicle battery market has a strong long-term supply outlook and a large commercial and industrial demand pool. Demand charges provide a clear customer benefit, while fleet charging and backup power create additional value.
However, used batteries will not win simply because they are cheaper. New batteries are becoming more competitive, and commercial customers care about uptime, safety, financing, and accountability.
The strongest business model is therefore:
A certified second-life storage marketplace with traceable battery records, standardized testing, application-specific performance ratings, insurance-backed warranties, and financing-ready contracts.
The first proof point should be a single fleet-to-storage project. If that trial demonstrates reliable energy throughput, accurate degradation forecasts, measurable demand-charge savings, and acceptable financing terms, the marketplace can scale from a testing service into a national infrastructure platform.
