An electric vehicle is a large battery that sits parked most of the day. Vehicle-to-grid (V2G) turns that idle capacity into grid services and savings — if the car, the charger, the utility, and the software all cooperate. After years of pilots, bidirectional charging is moving into commercial programs, from school-bus fleets to residential tariffs. This guide compares the platforms orchestrating it, on identical criteria.
European V2G and smart-charging specialist: The Mobility House — trading-grade EV flexibility.
Utility-scale EV orchestration: Kaluza — smart charging and V2G with automaker partners.
Hardware gateway: bidirectional chargers (Wallbox Quasar, Fermata-class) — nothing happens without them.
Automaker platforms: OEM energy services — the vehicle maker’s own V2H/V2G programs.
Standards layer: ISO 15118-20 & OCPP 2.x — the protocols that make it interoperable.
Scope: platforms that manage bidirectional EV charging for grid services, home backup, and bill savings — fleet V2G, residential V2H/V2G, and the aggregation software behind them. One-way charging management is our CPMS guide’s topic; wider DER aggregation our VPP guide’s. Six entries, identical criteria; order follows deployment maturity, not rank.
Criteria: segment served (fleet, residential, utility), market and program access, vehicle and charger compatibility, battery-warranty handling, commercial model, and the main tradeoff. Commercial terms are typically revenue-share or quote-based (checked October 9, 2026).
At a Glance
| Platform | Pricing | Best For | Link |
|---|---|---|---|
| Nuvve | Revenue share / service (quote-based) | Fleet V2G, especially school buses | nuvve.com → |
| The Mobility House | Platform & trading services (quote-based) | EV flexibility trading & V2G | mobilityhouse.com → |
| Kaluza | Platform licensing (quote-based) | Utility & automaker smart charging/V2G | kaluza.com → |
| Bidirectional chargers | Hardware purchase | The physical enabler | wallbox.com → |
| Automaker energy platforms | Bundled / program-based | Brand-native V2H/V2G | — |
| ISO 15118-20 & OCPP 2.x | Free standards | Interoperability | openchargealliance.org → |
Pricing checked October 9, 2026. Most platforms in this category sell quote-based enterprise plans; where we cite figures they come from vendor pages or published third-party comparisons and are order-of-magnitude indications, not offers. Billing basis (per user, per MW, per site) varies by vendor — confirm current terms directly before budgeting.
The Platforms in Detail
Nuvve
The fleet V2G pioneer
Best for: school districts and fleets whose vehicles sit idle on predictable schedules and can earn grid revenue.
| Segment served | Fleets, notably electric school buses |
| Market access | Grid-services programs and utility partnerships |
| Compatibility | Works with supported bidirectional chargers and vehicles |
| Battery warranty | Managed within fleet programs and manufacturer terms |
| Commercial model | Revenue share and service arrangements; quote-based. Checked October 9, 2026 |
| Main tradeoff | Fleet-focused; residential is not its core |
- School buses are ideal V2G assets: large batteries, long idle periods, and summer breaks that coincide with peak grid demand.
- Revenue sharing lowers the barrier for public fleets that cannot take on new technology risk alone.
- Years of pilots give it a practical understanding of utility interconnection and program rules that newer entrants lack.
The Mobility House
The flexibility trader
Best for: energy companies and fleet owners who want EV batteries to earn in energy markets, especially in Europe.
| Segment served | Fleets, residential programs, and partners |
| Market access | Trading EV flexibility in energy markets; V2G tariffs with partners |
| Compatibility | Interoperable bidirectional chargers; recent US residential V2G interconnection with Wallbox and a Kia EV9 |
| Battery warranty | Charging strategies designed around battery health |
| Commercial model | Platform and trading services; quote-based. Checked October 9, 2026 |
| Main tradeoff | Market access varies by country and utility rules |
- Treating EV batteries as tradable flexibility connects charging to the same markets battery storage serves (see our BESS guide).
- European experience with V2G tariffs gives it a head start as US utilities open programs.
- Expanding US activity, including residential bidirectional interconnection, shows the model crossing markets.
Kaluza
The utility-scale orchestrator
Best for: energy retailers and automakers who want smart charging and V2G for many customers at once.
| Segment served | Residential customers through retailers and automakers |
| Market access | Retailer tariffs and grid programs |
| Compatibility | Automaker partnerships (including Hyundai and Mitsubishi-related programs) |
| Battery warranty | Charging managed within automaker-approved parameters |
| Commercial model | Platform licensing; quote-based. Checked October 9, 2026 |
| Main tradeoff | Depends on retailer and automaker partners to reach customers |
- Automaker partnerships solve the hardest V2G question — whether the car maker approves the use case — at the source.
- Retailer integration links charging directly to tariffs, the simplest way for households to see savings.
- International programs (including Japan’s first residential V2G trial) build experience across very different grids.
Bidirectional chargers
The hardware gateway
Best for: every V2G program — without a bidirectional charger and utility approval, there is no V2G.
| Segment served | Residential and commercial |
| Market access | Requires utility interconnection approval, even for home-only use |
| Compatibility | Vehicle-specific; check supported models carefully |
| Battery warranty | Charger behavior must align with automaker requirements |
| Commercial model | Hardware purchase plus installation. Checked October 9, 2026 |
| Main tradeoff | Cost and compatibility remain the main adoption barriers |
- Interconnection approval is required because the charger can export power — plan for it in project timelines.
- Compatibility lists change quickly as automakers enable bidirectional features; verify before buying.
- Charger choice determines which software platforms can control it, so pick with the platform in mind.
Automaker energy platforms
The brand-native route
Best for: drivers and fleets that want V2H or V2G managed through the vehicle maker’s own ecosystem.
| Segment served | Owners of specific vehicle brands |
| Market access | Home backup first; grid programs in selected markets |
| Compatibility | Single brand |
| Battery warranty | Simplest — the automaker sets and honors the rules |
| Commercial model | Bundled or program-based. Checked October 9, 2026 |
| Main tradeoff | Brand lock-in; mixed fleets need neutral platforms |
- Warranty clarity is the biggest advantage: when the automaker runs the program, battery-use questions are settled.
- Home backup during outages is often the first, most tangible benefit drivers notice.
- Mixed-brand fleets will still need a neutral orchestration layer.
ISO 15118-20 & OCPP 2.x
The interoperability layer
Best for: anyone building V2G at scale — open standards keep vehicles, chargers, and platforms interchangeable.
| Segment served | All |
| Market access | Enables consistent communication with grid programs |
| Compatibility | The point of the standards |
| Battery warranty | Standardized communication supports automaker controls |
| Commercial model | Free standards. Checked October 9, 2026 |
| Main tradeoff | Real-world implementation still varies between vendors |
- ISO 15118-20 defines how vehicles and chargers communicate bidirectionally; OCPP connects chargers to management platforms.
- Choosing standards-based hardware protects against vendor lock-in as the market evolves.
- Certification and interoperability testing matter more than marketing claims of “support.”
Why V2G Is Finally Moving
Three barriers held V2G back: vehicles that could not discharge, chargers that were expensive and scarce, and utilities without rules or programs to pay for exported power. All three are easing. More vehicles support bidirectional charging, charger options are growing, and utilities and regulators are creating interconnection paths and compensation programs. Fleet operators, especially school districts, are proving the economics first because their vehicles are idle on predictable schedules.
The value stack mirrors battery storage: bill savings, backup power, demand-charge reduction, and grid-service revenue. The difference is that the battery also has to be ready to drive, so every V2G platform is fundamentally a scheduling problem between mobility needs and grid opportunities.
The Battery Warranty Question
The first question fleet managers and drivers ask is whether V2G will damage the battery or void the warranty. The honest answer is that it depends on how often and how deeply the battery is cycled, and on the automaker’s policy. Platforms that work closely with automakers, cap discharge depth, and log usage give owners the clearest answers and the strongest position if a warranty question arises.
Battery analytics (see our battery analytics guide) increasingly complement V2G platforms, giving fleets independent evidence of battery health over time. For public fleets in particular, that evidence matters when explaining programs to boards and the public.
Getting a V2G Program Started
Successful programs usually start small and specific: a handful of vehicles with predictable idle time, a single utility program with clear compensation, compatible vehicles and chargers, and agreed rules with the automaker. Early results then justify expansion. Trying to cover every vehicle type and market at once is the most common reason pilots stall.
Interconnection deserves early attention. Even residential V2G requires utility approval, and commercial sites may need electrical upgrades. Engaging the utility at the start, alongside the platform provider, avoids long delays after equipment has already been bought.
Kurums Match: Which One Fits You?
Pick the statement that sounds most like your situation.
We run a school-bus or municipal fleet.
Fleet V2G specialists (Nuvve-class) with revenue-share models fit predictable idle times. Engage your utility early on interconnection and programs.
We’re an energy retailer designing an EV tariff.
Utility-scale orchestration (Kaluza-class) or trading platforms (The Mobility House-class) connect charging to tariffs and markets.
We want home backup from our EV.
Start with the automaker’s own V2H program and a compatible bidirectional charger; confirm utility interconnection requirements.
We’re planning a mixed-brand fleet.
Prioritize standards-based chargers (ISO 15118-20, OCPP 2.x) and neutral platforms to avoid lock-in.
Frequently Asked Questions
What should a fleet track to prove V2G value?
Energy exported and imported, revenue or savings per vehicle, vehicle availability for routes, battery health trends, and any missed trips. Showing that mobility needs were always met is as important to fleet managers as the revenue figure.
Can V2G help with demand charges at depots?
Yes — discharging vehicle batteries during site peaks can reduce demand charges, often a simpler value stream than wholesale grid services. Our C&I energy management and microgrid guides cover site-level optimization.
Does V2G damage EV batteries?
Additional cycling can contribute to wear, but impact depends on depth and frequency of discharge. Platforms that respect automaker limits and monitor battery health minimize the risk.
How much can V2G earn?
It varies widely by market, program, and vehicle availability. Fleets with long idle periods during peak demand typically see the strongest economics.
Is utility approval needed for home V2H?
Generally yes, because bidirectional equipment can export power. Even home-only use often needs interconnection approval.
How is V2G different from smart charging?
Smart charging shifts when a vehicle charges; V2G also sends power back to the home or grid. Smart charging is simpler and widely available; V2G adds value but complexity.
Which vehicles support bidirectional charging?
A growing number of models, but support varies by market and charger. Always check current compatibility lists.
How does V2G relate to virtual power plants?
V2G-enabled vehicles can be aggregated into VPPs; our VPP guide covers that aggregation layer.
Related Comparisons & Guides
- EV charging management software compared
- VPP & DERMS software compared
- Battery analytics & BESS safety software
- Fleet electrification planning software
- Battery storage optimization software compared
Last updated: October 9, 2026 · Reviewed by the Kurums Startup editorial team.
Disclosure: Kurums currently has no affiliate, sponsorship, or partnership relationship with any product compared on this page. If that changes, this page will say so here and affected links will carry sponsored attributes.
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