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

Smart meters and time-of-use (TOU) rate structures are reshaping how New Jersey EV owners manage charging costs and grid load. This page covers how advanced metering infrastructure operates, how TOU rates function, the utility programs available through PSE&G and JCP&L, and the decision logic that determines when smart-meter-enabled charging delivers measurable cost savings versus when standard flat-rate service is more appropriate.

Definition and scope

A smart meter is an advanced metering infrastructure (AMI) device that records electricity consumption in 15-minute or 60-minute intervals and transmits that data to the utility in near real-time, replacing the legacy analog meters that only reported cumulative monthly usage. The New Jersey Board of Public Utilities (NJBPU) oversees utility deployment of AMI infrastructure under its Electric Distribution Company (EDC) oversight authority, and both PSE&G and Jersey Central Power & Light (JCP&L) have undertaken AMI rollouts under NJBPU-approved modernization plans.

Time-of-use rates are electricity tariff structures that assign different per-kilowatt-hour prices to different time windows — typically an on-peak period (roughly 2 p.m. to 10 p.m. on weekdays), an off-peak period (overnight through early morning), and in some tariffs a super-off-peak or shoulder window. Because EV charging is a discretionary, deferrable load, TOU pricing creates a direct financial incentive to shift charging into low-cost overnight windows rather than drawing power during peak demand hours when grid stress and marginal generation costs are highest.

The scope of this page covers residential and small commercial applications within New Jersey's investor-owned utility service territories. Municipal utilities and electric cooperatives operating outside NJBPU jurisdiction are not covered here. For the broader regulatory framework governing New Jersey electrical systems, see the regulatory context for New Jersey electrical systems.

How it works

Smart meters enable TOU billing by providing the granular time-stamped interval data that flat-rate meters cannot supply. The operational flow involves four discrete phases:

1. Meter enrollment — The utility replaces the existing analog or first-generation digital meter with an AMI device. The meter registers consumption in 15-minute intervals and transmits data via radio frequency or cellular network to the utility's metering data management system.

2. Rate election — The customer opts into a TOU tariff. In New Jersey, PSE&G offers its Electric Vehicle Charging Program and a residential TOU option; JCP&L offers comparable rate structures under its NJBPU-approved tariff schedules. Rate elections are filed with the utility and typically take effect on the next billing cycle.

3. Charger scheduling — A Level 2 EVSE (Electric Vehicle Supply Equipment) with scheduling capability — whether programmed through the vehicle's onboard system or through the charger's network interface — directs charging to begin during off-peak windows. For network-connected charger considerations, the page on network-connected EV charger electrical considerations in New Jersey covers the hardware requirements in detail.

4. Billing reconciliation — The utility applies the applicable TOU rate to each interval's consumption. The monthly bill reflects the sum of on-peak kWh × on-peak rate plus off-peak kWh × off-peak rate, rather than a single blended rate applied to total monthly consumption.

The electrical installation underpinning this system must comply with NEC Article 625, which governs EVSE wiring under NFPA 70 (2023 edition), and with New Jersey's adoption of the NEC through the Uniform Construction Code (UCC) under N.J.A.C. 5:23. Dedicated circuit requirements remain unchanged regardless of rate structure — for specifics, the dedicated circuit requirements for EV chargers in New Jersey page provides the applicable sizing and protection standards.

Common scenarios

Residential single-family with overnight charging — The most straightforward case. A homeowner with a Level 2 charger installed in a garage programs the vehicle to begin charging at 11 p.m. and complete by 6 a.m. Under PSE&G's off-peak window, off-peak rates are significantly lower than on-peak rates, and a typical 60 kWh battery pack requiring a 40 kWh overnight top-up can represent a material per-session cost differential. For garage installation specifics, see garage EV charger electrical installation in New Jersey.

Multifamily and condominium buildings — Shared metering configurations complicate TOU enrollment. Buildings with sub-metered EV circuits can enroll individual units, but master-metered properties require utility coordination. The multifamily EV charging electrical systems in New Jersey page addresses the sub-metering and load management frameworks relevant to these configurations.

Solar-integrated installations — Customers with rooftop photovoltaic systems may find that TOU rates interact with net metering export credits in ways that require careful scheduling logic. Daytime solar generation can offset on-peak consumption, while the EV charges overnight on low-cost grid power. The solar integration with EV charger electrical systems in New Jersey page covers the interconnection and rate interaction specifics.

Commercial and workplace charging — Demand charges — a separate billing component based on peak 15-minute interval demand in kilowatts — often dominate commercial electricity costs far more than the per-kWh TOU differential. Load management systems that stagger multiple charger sessions become essential in these environments. The EV charger load management systems in New Jersey page details the relevant control architectures.

Decision boundaries

The decision to enroll in a TOU rate program, and whether smart-meter-enabled charging delivers net savings, turns on four factors:

A household that charges primarily overnight, drives 15,000 or more miles annually, and has a networked Level 2 charger is the clearest candidate for TOU enrollment. A household with inflexible charging windows or substantial daytime loads that would incur higher on-peak billing may find that the flat-rate tariff produces lower total bills despite forgoing the overnight discount.

Understanding the full electrical system context — including panel capacity, circuit sizing, and permitting status — grounds any TOU decision in physical infrastructure reality. The how New Jersey electrical systems work conceptual overview provides the foundational framework, and the New Jersey EV charger incentives and rebates page documents financial programs that may offset smart charger equipment costs. For a complete orientation to EV charging infrastructure resources in New Jersey, the site index provides a structured entry point to all topic areas.

Permitting note: smart meter enrollment and TOU rate elections are utility-administrative processes and do not require a building permit. However, any new EVSE circuit installation or panel modification required to support Level 2 charging does require a permit and inspection under the New Jersey UCC administered by the local construction official. The inspection process is distinct from the utility's meter upgrade workflow.

References

• New Jersey Board of Public Utilities (NJBPU)
• PSE&G Electric Vehicle Charging Program
• Jersey Central Power & Light (JCP&L) — FirstEnergy
• NFPA 70 (National Electrical Code), 2023 Edition, Article 625 — Electric Vehicle Charging System
• N.J.A.C. 5:23 — New Jersey Uniform Construction Code
• New Jersey Clean Energy Program — Transportation Electrification
• U.S. Department of Energy — Advanced Metering Infrastructure and Time-of-Use Rates