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TAG agrees phased EV-parking approach tied to regional power-plan projections
Summary
The TAG endorsed a phased, model-based approach to EV charging requirements: retain 10% immediate EVSE requirement, tie EV-capable targets to five- and 20-year regional adoption projections, and reduce immediate EV-ready thresholds to limit upfront capital costs. Members cited a sensitivity analysis showing potential life-cycle savings from early
The IBC technical advisory group reviewed revisions to the EV charging parking provisions on Sept. 3 and supported a phased approach that aligns code requirements with regional adoption projections from the Northwest Power and Conservation Council.
Under the committee's recommended approach, the immediate requirement for EVSE (plug-in chargers) remains at 10% of parking spaces in the first category. EV-capable targets are staged: an additional 10% in the first five years (yielding 20% in the near term under cumulative application) and higher targets on a longer 20-year horizon. The TAG reduced the immediate EV-ready percentage (infrastructure and raceways with conduit) compared with earlier drafts to avoid requiring excessive upfront capital investments that jurisdictions and building owners may not be prepared to absorb. The committee tied the phased targets to the regional power-plan adoption rates so the rule can be reviewed against updated power-plan numbers every five years.
Proponents said the phased approach can lower life-cycle costs because retrofit installations are typically more expensive than incorporating conduit and capacity during initial construction. "The idea is every cycle, we can just quickly review where those adoption projections are, and we can tweak every code cycle if necessary," Dustin said. Members asked for continued sensitivity analysis and documentation; staff confirmed that the committee had run a cost-sensitivity model and would post results for public review.
The TAG generally characterized the package as reducing upfront costs for developers while positioning jurisdictions to meet a projected growth in electric vehicle adoption. Staff will include the analysis in the material posted for the public hearings next week.
