V2G Bidirectional EV Charger
V2G (Vehicle-to-Grid), V2H and bidirectional EV charger project support for fleets, ports, buildings and grid-service pilots. Vehicle, protocol, power and approval scope are confirmed by project.
When is a V2G bidirectional charger the right choice?
Short answer: V2G is best for pilot projects, fleets, ports, depot energy management and V2H/V2B demonstrations where the buyer already has compatible vehicles, grid permission and an energy management plan. For most commercial charging sites, AC wallbox or DC fast charger deployment should remain the first decision; V2G is added only when the project has a clear bidirectional use case.
Confirm vehicle compatibility
Check whether the target vehicles support bidirectional charging, connector protocol and required ISO 15118 functions.
Confirm grid permission
Grid-tied export normally needs anti-islanding, metering and local utility approval before hardware selection.
Define the business case
Fleet peak shaving, backup power, port energy support or demonstration projects each need different control logic.
Keep AC/DC chargers as the core
Use standard AC/DC charging pages for regular deployment, and use V2G only as a specialized supporting solution.
For procurement, the safest sequence is: choose the normal AC or DC charger baseline first, then define the bidirectional layer. Send the vehicle list, connector standard, grid rule, site load profile, OCPP/CSMS or EMS requirement, target market and quantity. SUNFULL can then recommend whether a 22kW AC V2G unit, 50kW DC bidirectional charger or higher-power project configuration is the better starting point.
For sample approval, buyers should test more than charging and discharging. Check vehicle handshake, backend reporting, emergency stop, isolation protection, metering, firmware version, enclosure labeling, spare-part access and packing protection. These details determine whether a V2G pilot can move from demonstration to repeatable commercial supply.
Six Checks Before Selecting a V2G Charger
Vehicle Capability
Confirm the exact vehicle or vessel supports bidirectional charging and the required connector and communication profile.
Bidirectional Power Stage
Request charge and discharge ratings, operating limits, efficiency, thermal design and protection test scope.
ISO 15118 Scope
Identify the supported edition, functions, certificate-chain responsibility and interoperability test plan by model.
Grid Connection
Anti-islanding, metering, export limits and grid-code compliance depend on the country, utility and site design.
CSMS and EMS
Define OCPP, site-controller, dispatch, cyber-security, data and third-party integration requirements before pricing.
Supplier Evidence
Request exact model files, test records, approved interfaces and documented project roles instead of relying on generic pilot claims.
Build a V2G project matrix before selecting equipment
OCPP support alone does not prove that a charger is V2G compatible. Vehicle capability, bidirectional power hardware, vehicle-to-charger communication, grid permission and site controls must be verified as separate project layers.
| Project layer | Buyer input | Supplier or project evidence | Acceptance owner |
|---|---|---|---|
| Vehicle | Exact vehicle or vessel model, battery limits and intended V2G, V2H or V2B use. | Vehicle-side bidirectional capability and permitted interface confirmed for that model. | Vehicle owner or OEM and buyer engineering team. |
| Connector and communication | Connector, charging method and required ISO 15118 or other communication scope. | Charger model, supported profile, firmware version and interoperability record. | Charger supplier and vehicle integration owner. |
| Bidirectional power | Charge and discharge power, duty cycle, operating limits and site load objective. | Model-level ratings, protection scope and charge/discharge test record. | Supplier technical team and buyer acceptance team. |
| Grid and site | Country, utility, export limit, metering, protection and local approval route. | Site design, applicable requirements and project-specific approval records. | Local engineer, utility or authority as applicable. |
| EMS and CSMS | Dispatch objective, OCPP scope, site controller, data, cybersecurity and remote operation. | Interface definition, test cases, logs and fallback behavior. | Buyer operator, EMS or CSMS provider and system integrator. |
| Pilot acceptance | Pilot size, vehicles, operating window, success criteria and support plan. | Signed test results, configuration versions, open issues and responsibility handover. | Buyer project owner and all named technical parties. |
Information to send with a V2G project RFQ
Send the vehicle model, target market, V2G/V2H/V2B use case, bidirectional power, connector, grid and metering requirements, ISO 15118 scope, EMS or CSMS, pilot quantity and acceptance objectives. Compatibility, grid approval and operating results must remain project-specific until tested.
Review the ISO 15118 and DIN 70121 scope and the marine V2G pilot planning guide where relevant.
V2G and V2H Project Paths to Review
These are requirement paths, not claims that one charger supports every vehicle, protocol or grid market.
Common Questions From Buyers
What is V2G and how does it work?
V2G allows a compatible vehicle and bidirectional charger to exchange power with a site or grid under controlled conditions. Revenue or grid-service participation depends on local regulation, aggregator access, metering, tariffs and the vehicle agreement.
Is V2G safe for my EV battery?
Battery impact cannot be assumed from the charger alone. Confirm vehicle warranty, battery-management limits, permitted depth of discharge, cycle strategy and the responsibility of the vehicle manufacturer or fleet operator.
How should buyers evaluate V2G revenue assumptions?
Revenue depends on local grid-service rules, aggregator access, metering, dispatch requirements and tariff design. Treat revenue as a site feasibility item; the RFQ should first confirm vehicle compatibility, ISO 15118, OCPP/CSMS, protection design and project documentation.
Do your V2G chargers support CCS2?
Connector and communication support vary by model and vehicle. Confirm CCS, CHAdeMO or another interface together with the exact ISO 15118 profile and interoperability test.
V2G Bidirectional Charger Procurement Questions
Is V2G suitable for every commercial charging station?+
No. Most commercial sites should first define AC or DC charging demand. V2G is suitable when the site has compatible vehicles, grid export permission and a clear energy-management use case.
What information is needed for a V2G project quotation?+
Send vehicle model, connector standard, power level, grid connection rules, V2G/V2H/V2B use case, site load profile, communication protocol and expected quantity.
Does a V2G charger require OCPP or ISO 15118?+
Many bidirectional projects require ISO 15118 functions and backend integration. The exact scope depends on vehicle compatibility, CSMS requirements and grid-service design.
Can V2G be combined with solar or battery storage?+
Yes, but the control strategy must be defined carefully. Solar, BESS and V2G can support weak-grid or depot applications when the EMS, metering and protection design are aligned.
Does OCPP support alone prove that a charger is V2G compatible?+
No. OCPP mainly covers charger-to-backend communication. V2G also requires a compatible vehicle, bidirectional power hardware, the required vehicle-to-charger communication profile, grid and protection approval, and end-to-end project testing.
What evidence is required before a V2G pilot?+
Request model-level bidirectional power data, vehicle compatibility confirmation, connector and protocol scope, firmware versions, site grid and protection requirements, EMS or CSMS interface definitions, agreed test cases and a signed pilot acceptance record.