Bidirectional EV Charging: V2G, V2H and V2L Procurement Guide
Understand bidirectional AC/DC charging, grid-export permissions, ISO 15118 dependencies and practical V2G equipment selection.
Bidirectional is not one feature
V2G sends energy toward the grid, V2H can supply a building, and V2L can support approved loads. Each use case needs a compatible vehicle, charger, controls, metering and permissible electrical connection. A charger described as V2G-ready is not automatically able to export electricity in every market.
Power conversion architecture
Bidirectional DC chargers use controlled DC/AC conversion and appropriate grid-interconnection protection; AC approaches rely on vehicle capabilities and compatible external equipment. Ask for single-line diagrams and operating modes, not merely a software checkbox.
Standards and protocol compatibility
ISO 15118 variants can support vehicle-to-EVSE communication, but support claims must specify vehicle, firmware and implementation. OCPP is station-to-backend management, not a guarantee that local grid export will work.
Safety and interconnection
Anti-islanding, grid-code settings, earthing, metering, export limits, outage isolation and utility approvals can control feasibility. A V2H backup use case may require an approved transfer arrangement; consult qualified local professionals.
Commercial feasibility
Evaluate allowed dispatch windows, vehicle availability, battery warranty provisions, energy losses, tariffs and aggregation or participation rules. Project economics depend on local market and real cycling assumptions.
Evidence for RFQ
Request verified vehicle models, tested operating modes, applicable market documentation, protection and interconnection evidence, firmware versions, warranties and acceptance test procedures.
Key takeaways
- Engineering guidance rather than a claim of certification, current inventory or compatibility with every vehicle.
Primary references
Educational content, not installation or legal advice. Check current standards and local requirements.
Planning an EV charging project or sourcing enquiry?
CowinLink Limited works with manufacturing partners on EV charging sourcing, OEM/ODM and distribution enquiries. Share the target market, installation use case, preferred interface and estimated quantity; model specifications and compliance are checked for each project.
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