Smart Meters and Time-of-Use Rates for EV Charging in New York

Smart meters and time-of-use (TOU) electricity rates are reshaping how New York electric vehicle owners manage charging costs. This page explains how advanced metering infrastructure integrates with utility rate structures, how New York's major utilities administer TOU programs, and what electrical and permitting factors determine whether a property can take full advantage of these rate designs. Understanding this framework is central to optimizing the long-term economics of home or commercial EV charging.

Definition and scope

A smart meter — formally classified under Advanced Metering Infrastructure (AMI) — is a bidirectional digital device that records electricity consumption at intervals as short as 15 minutes and transmits that data to the utility without manual reading. Unlike conventional electromechanical meters, AMI devices enable utilities to apply time-differentiated pricing, monitor grid load in near real time, and support demand response programs.

Time-of-use rates are tariff structures that assign different per-kilowatt-hour (kWh) prices depending on the hour and day consumption occurs. Under a standard TOU design, an "off-peak" window — typically late night and early morning hours — carries a significantly lower rate than the "on-peak" window covering afternoon and early evening demand. Con Edison's EV-TOU rate (SC-11 Rider EV), for example, establishes distinct service levels tied to system peak periods as defined in filings with the New York Public Service Commission (NYPSC). PSEG Long Island administers a comparable residential TOU offering under its own tariff schedules approved by the Long Island Power Authority (LIPA).

For the broader regulatory environment governing these programs, the Regulatory Context for New York Electrical Systems page provides foundational background on NYPSC authority and utility tariff structures.

Scope and coverage limitations: This page applies to properties located within New York State and served by utilities regulated by the NYPSC or LIPA. Federal rate-setting authority under the Federal Energy Regulatory Commission (FERC) for wholesale electricity is not covered here. Provisions specific to New York City building codes or multi-tenant electrical infrastructure are addressed separately in the Multifamily Building EV Charger Electrical Infrastructure New York resource. Commercial demand charge structures are outside the scope of this page and are covered in Demand Charge Management EV Charging New York.

How it works

The operational chain connecting a smart meter to a lower EV charging bill involves four discrete phases:

1. Meter installation and enrollment — The utility installs or remotely activates the AMI meter at the service entrance. The customer then enrolls in a qualifying TOU tariff, either through an opt-in application or, in some utility territories, through automatic assignment under a default TOU pilot.
2. Interval data collection — The meter logs consumption in 15- or 60-minute intervals. This granular record allows the utility billing system to apply the correct rate to each interval rather than averaging across the entire billing cycle.
3. EVSE scheduling or smart charging activation — The EV charger (EVSE) must be capable of accepting a charge schedule, either programmed manually by the owner or communicated via a network management system. Level 2 EVSE units compliant with SAE J1772 and equipped with Wi-Fi or Ethernet interfaces can receive schedule commands. NEC Article 625 governs the electrical installation requirements for these units in New York. Details on charger electrical requirements appear in EV Charger Electrical Requirements New York.
4. Bill calculation and reconciliation — The utility's billing platform cross-references interval consumption data against the active tariff, applying off-peak rates to charging sessions that occurred within the approved window and on-peak rates to any consumption outside that window.

For a foundational explanation of how New York's electrical service infrastructure supports these systems, see How New York Electrical Systems Works: Conceptual Overview.

The electrical panel must support the dedicated circuit feeding the EVSE without causing load imbalance that trips the smart meter's demand threshold. Panel adequacy is examined in Panel Upgrade Requirements for EV Charging New York, and dedicated circuit specifications are detailed in Dedicated Circuit Requirements for EV Chargers New York.

Common scenarios

Scenario 1 — Single-family residential with Con Edison service: A homeowner in Westchester County installs a Level 2 EVSE drawing 48 amperes on a 60-ampere dedicated circuit. After enrolling in the SC-11 Rider EV tariff and scheduling overnight charging between 11 p.m. and 7 a.m., the effective per-kWh cost for EV charging falls into Con Edison's off-peak tier, which is structurally lower than the standard residential rate during peak hours. The smart meter logs the overnight sessions separately from daytime household consumption.

Scenario 2 — PSEG Long Island residential: A Nassau County homeowner enrolls in PSEG Long Island's residential TOU rate. LIPA-approved tariff schedules define weekday peak hours, typically between noon and 8 p.m. in summer months. Charging scheduled outside those hours qualifies for off-peak pricing. PSEG Long Island's AMI rollout, supported under New York State's Reforming the Energy Vision (REV) initiative led by the NYPSC, enables automated interval billing without manual meter reads.

Scenario 3 — Workplace or small commercial: A small business in Buffalo served by National Fuel Electric or National Grid installs two Level 2 EVSE units in a parking lot. Network-connected chargers — governed by the requirements outlined in Network Connected EV Charger Electrical Requirements New York — can stagger charging sessions to avoid simultaneous peak draws, reducing both energy charges and potential demand charges under the applicable commercial tariff.

TOU vs. flat-rate comparison:

Decision boundaries

The following factors determine whether a property can effectively access smart meter TOU benefits for EV charging:

• Meter eligibility: Properties must be served by an AMI-capable meter. In Con Edison's territory, the AMI deployment is ongoing under NYPSC-approved plans; properties still served by legacy electromechanical meters cannot receive interval-based billing until the meter is upgraded.
• Tariff availability by utility: Not all New York utilities offer an EV-specific TOU rider. National Grid's residential EV rate availability varies by service territory. Customers should confirm tariff availability directly against current NYPSC-filed tariff schedules at the NYPSC Document and Matter Management System.
• EVSE scheduling capability: A Level 1 charger (120-volt, 12–16 ampere) drawing approximately 1.4–1.9 kW provides minimal benefit from TOU scheduling due to low draw; the absolute dollar savings per session are small. A Level 2 unit drawing 7.2–11.5 kW generates meaningful TOU savings and warrants scheduling investment. The electrical differences between these charger levels are examined in Level 1 vs Level 2 vs DC Fast Charging Electrical Differences.
• Permitting and inspection status: New York State requires permits for EVSE installation under the New York State Uniform Fire Prevention and Building Code. A permitted and inspected installation is a prerequisite for utility interconnection in most territories. The permit process is outlined at New York State EV Charger Electrical Permit Process, and the full checklist is available at EV Charger Electrical Inspection Checklist New York.
• Load calculation adequacy: The existing electrical service must accommodate the added EVSE load without exceeding the service entrance rating. NEC Article 220 load calculation methods apply; details are in Load Calculation for EV Charger Installation New York.
• Solar and storage interaction: Properties with solar photovoltaic systems or battery storage introduce additional complexity to TOU optimization. Charging from on-site generation during peak hours may be more economical than drawing from the grid at off-peak rates in some configurations. This interaction is analyzed in Solar Integration with EV Charger Electrical Systems New York.

For an introduction to the full scope of EV charging electrical topics in New York, the New York EV Charger Authority home page provides navigation to all related subject areas.

References

• New York Public Service Commission (NYPSC) — Document and Matter Management System
• Con Edison Tariff Schedules — SC-11 EV Rider
• PSEG Long Island / Long Island Power Authority (LIPA) Rate Schedules
• [New York State Energy Research and Development Authority (NYSERDA) — Reforming the Energy Vision (REV)](https://www.nyserda.ny.gov/All-Programs/RE