Emergent Team·May 25, 2026·9 min read

EV Charging Metering: Code Compliance & Demand Management

Electric vehicle charging is rapidly becoming a standard feature of commercial buildings—and with it comes a growing patchwork of metering requirements. The 2024 IECC mandates separate EV charging metering. The NEC 2026 introduces new marking, shutoff, and GFCI requirements for commercial EVSE. Building Performance Standards require accurate load data to calculate carbon emissions that include EV charging. And building owners need per-charger metering to allocate costs, manage demand, and justify infrastructure investment.

The Regulatory Landscape for EV Charging Metering

2024 IECC: Separate EV Metering

The 2024 IECC introduced EV-ready requirements through new appendices for both residential (Appendix RK) and commercial (Appendix CH) buildings. These provisions require dedicated electrical circuits for EV charging and, critically, require that EV charging loads be metered separately from other building loads. This separate metering ensures that EV energy consumption does not distort the building's energy benchmarking metrics and allows building owners to accurately allocate EV charging costs to users.

States that have adopted or are reviewing the 2024 IECC—including Rhode Island (adopted, effective December 2025), Connecticut, Massachusetts, New Jersey, New York, Delaware, Maryland, DC, and Maine—will incorporate these EV metering requirements into their building codes. Colorado's electric-ready requirements, already in effect, mandate similar provisions.

NEC 2026: New Safety and Infrastructure Requirements

The 2026 National Electrical Code (effective September 1, 2026 nationally, with state adoption timelines varying) introduces several changes to Article 625 that affect EV charging metering and infrastructure:

• Emergency shutoffs are now required for EV chargers in commercial and public settings.
• EVSE must be permanently marked with supply voltage, phase, frequency, full load current, and short circuit current rating.
• GFCI protection requirements are expanded.
• All installations must be performed by qualified persons with demonstrated skills and knowledge.

These requirements increase the importance of accurate, per-charger metering to verify that each unit is operating within its rated parameters and to detect ground faults or other anomalies.

Building Performance Standards

BPS laws in cities like New York, Boston, DC, Seattle, and Denver calculate building carbon emissions based on total energy consumption. If EV charging energy is not metered separately, it inflates the building's carbon emissions calculation and may push the building over its carbon cap—resulting in penalties for energy that is actually displacing gasoline emissions in the transportation sector. Separate EV metering allows building owners to account for EV charging energy accurately in their BPS reporting, potentially qualifying for credits or exclusions that some jurisdictions offer for transportation electrification.

Monitoring Architecture for EV Charging

Level 2 Chargers (208–240V, 7–19 kW)

Level 2 chargers are the most common commercial installation, typically deployed in employee parking, tenant parking, and visitor spaces. Each charger is fed by a dedicated 40A or 50A circuit from a distribution panel. A PAN-10 sensor ($190) on each charger circuit captures per-charger energy consumption at 10-second intervals. For installations with multiple Level 2 chargers fed from a single distribution panel, a Leviton S7100 BCM (12, 24, or 48 inputs) provides per-circuit metering across the entire panel from a single device.

In PowerRadar, each charger is configured as a separate device in the "EV Charging" device group, enabling the building operator to track total EV charging load as a distinct end-use category.

DC Fast Chargers (480V, 50–350 kW)

DC fast chargers represent a significant electrical load that can dramatically affect building demand charges. A single 150 kW DCFC draws more power than many small commercial buildings. A PAN-42 three-phase meter ($389) with appropriately sized CTs provides true power measurement on the DCFC feeder, capturing not just energy (kWh) but also demand (kW), power factor, and reactive power—critical data for demand management and utility bill analysis.

PowerRadar's threshold alerts can be configured to notify building operators when DCFC demand exceeds a specified level, enabling load management strategies such as power sharing, scheduled charging windows, or temporary curtailment during building peak demand periods.

Fleet Charging Depots

Commercial fleet operations (delivery vehicles, transit buses, utility trucks) require large-scale charging infrastructure with dozens or hundreds of chargers operating on coordinated schedules. PAN-42 meters on each charger feeder provide the per-vehicle energy data needed for fleet fuel cost accounting. The Gen 4+ Bridge's 4G LTE connectivity option ($470) is particularly valuable for fleet depots located in outdoor areas or remote lots where building IT networks are unavailable.

Integrating EV Data into the Unified PowerRadar Platform

EV charging data in PowerRadar is managed through the same device group, reporting, and alerting infrastructure as all other building energy data. The Energy Flow (Sankey) diagram shows EV charging as a distinct end-use category flowing from the building's main supply, alongside HVAC, lighting, plug loads, and process loads. Automated reports separate EV energy from building energy, providing the documentation needed for BPS compliance, ENERGY STAR Portfolio Manager benchmarking, and tenant cost allocation.

For buildings that generate on-site renewable energy (rooftop solar PV monitored by PAN-42 sensors on the inverter output), PowerRadar can display the relationship between solar generation and EV charging consumption, supporting claims that EV charging is powered by renewable energy—a valuable narrative for ESG reporting and tenant communications.

Adding EV charging to your building? Contact Emergent Metering at 215-645-7141 to discuss per-charger monitoring, demand management, and code-compliant metering solutions.

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Emergent Metering Solutions provides commercial and industrial metering hardware, installation support, and energy analytics services. We specialize in electric meters, water meters, BTU meters, compressed air meters, gas meters, and steam meters with Modbus RTU, BACnet IP, pulse output, and wireless communication options. Our Managed Intelligence services deliver automated reporting, anomaly detection, tenant billing, and AI-powered consumption forecasting. We support compliance with IECC 2021, ASHRAE 90.1-2022, NYC Local Law 97, Boston BERDO 2.0, DC BEPS, California LCFS, and EU CSRD requirements.

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