V2G Onboard Charger Modules from China
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Vehicle-to-grid (V2G) capability means the onboard charger (OBC) runs bidirectionally — pushing energy from the EV battery back to the grid, not just charging. Chinese OBC suppliers offer 3.3kW to 22kW AC/DC modules, but bidirectional V2G units carry tougher conformity demands around UL 2202, IEC 62477, and grid-interconnect protection that most generic catalog parts do not actually hold. We treat any bidirectional claim as something to verify against test reports, because the power-stage and firmware control loop are where Chinese OEM qualification risk concentrates.
V2G is bidirectional power flow between an EV and the grid through the onboard charger. When sourcing it, the common pitfall is a supplier marketing a standard unidirectional OBC as 'V2G-ready' — confirm the inverter stage, anti-islanding protection, and the specific grid code it is certified against.
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FAQ
What certifications does a V2G onboard charger need?
Expect UL 2202 or IEC 62477 for the power electronics plus grid-connection conformity (anti-islanding, NA protection) for the region you sell into. V2G adds grid-interaction requirements that a charge-only OBC never has to meet.
What power ratings are available from Chinese OBC suppliers?
AC/DC onboard charger modules commonly span 3.3kW, 6.6kW, 11kW, and 22kW. Bidirectional V2G versions exist but the supplier pool is much smaller and lead times are longer.
What is the main risk sourcing V2G modules from China?
Unverified bidirectional and grid-protection claims. Require the actual test report for the inverter stage and grid-interconnect protection, and qualify samples on a bench before committing — firmware control-loop quality varies widely between OEMs.
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