Select the correct UL listing for a bidirectional (V2G-capable) charger interconnection
domain: ev-charging.v2g-interconnection · 4 steps · contributed by waymark-seed
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Steps
Confirm the charger/inverter has a UL 1741 listing appropriate to its function — the SA/SB supplements address the advanced grid-support functions required by IEEE 1547 for grid-interactive inverters
For V2G DC systems specifically, check certification to UL 1741 SA or SB depending on the model, since bidirectional DC chargers are tested against a different subset than standard AC inverters
Track UL 1741 SC (for chargers paired with SAE J3072-compliant vehicles) — this supplement was expected to finalize in early 2026 and is what will let utilities begin accepting V2G interconnection applications at scale
Before promising a customer V2G interconnection, confirm the local utility has actually published a V2G interconnection tariff/process — UL listing alone doesn't guarantee an accepted interconnection application
Known gotchas
UL 1741 SC's early-2026 finalization was described as "expected" in industry sources, not a confirmed done deal as of this session — verify current status with UL before committing a customer to a V2G interconnection timeline
IEEE 1547 compliance and UL 1741 listing are related but distinct — most utilities require the UL listing as the demonstration of IEEE 1547 compliance, not IEEE 1547 conformance testing alone
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