Leviton: Electrical wiring devices, VerifEye submeters and home energy management

Overview

Leviton began in 1906, when Evser Leviton and his son Isidor started making brass mantle tips for gas lighting on Manhattan's Lower East Side, according to the company's history. Over the following century it grew into a maker of switches, receptacles and other wiring devices, introducing the GFCI and the Decora line in the 1970s, and it still trades as a private company under the name Leviton Manufacturing Co., Inc.

Energy measurement is a smaller but long-standing part of that business. Leviton publishes the VerifEye submetering documents under its lighting and controls business, whose division office in Tualatin, Oregon appears on its locations page. In October 2011 Leviton bought Obvius, a Portland data acquisition company founded in 2001, which brought data acquisition hardware such as the AcquiSuite servers and browser-based energy dashboard software. The pitch at the time, from chief operating officer Daryoush Larizadeh, was a single supplier for tracking, monitoring and verifying energy use.

What sets Leviton apart from specialist meter makers is the channel. VerifEye meters, current transformers, enclosures and the software that reads them are sold through the same electrical distributors as Leviton's breakers and wiring devices, and the submetering page frames the range around tenant billing and US energy codes such as ASHRAE 90.1, IECC and California Title 24. Since 2019 the company has also brought circuit-level monitoring into homes through its smart load centre and breakers, which puts the same measurement idea in front of residential electricians.

Offering

The VerifEye range covers electric submeters, multiple meter units, submeter kits with current transformers, networking devices, UL 508A submetering panels and software. Series 1000 and 2000 are single- and three-phase kWh submeters with isolated pulse outputs for tenant billing and measurement and verification. Series 3300 and 3500 were launched in April 2013 as multi-function meters with RS-485 and Ethernet respectively; some of their catalogue numbers, such as the 3NUMT-8M, are now marked discontinued.

The Series 4000 meter kits are the industrial option: a compact three-phase Series 4000-K meter sold alone or with 100 to 800 A split-core CTs or Rogowski coils, either for DIN rail (4KUMR) or inside an outdoor NEMA 4X enclosure (4OUMR). The Series 7000 branch circuit monitor measures up to 48 circuits on one board, grouped as up to 24 single-, two- or three-phase virtual meters, with per-circuit volts, amps, power, demand, energy and alarm thresholds.

Software and data collection

Building Manager Online is the analysis and billing service. The software page describes Basic, Advanced Reporting and Tenant Billing modules, virtual meters that group lighting, HVAC and plug loads, and reports for codes such as New York Local Law 88. It is a paid annual subscription with no free version. Without it, the submetering page says data can still be viewed in a browser and downloaded as CSV; Leviton's hub takes up to 32 Modbus meters, and each HD Pulse Module 23 pulse meters.

Homes and EV charging

The 2nd Gen Smart Circuit Breakers and Whole Home Energy Monitor of August 2023 add remote on and off, scheduling and load shedding to a Leviton load centre, with CT pairs for mains, solar, battery and generator. Leviton also sells Wi-Fi Level 2 chargers such as the 48 A EV48W, and Decora Smart switches and outlets in Wi-Fi and Zigbee 3.0 versions.

Technology

The commercial meters use open building protocols rather than a proprietary bus. Leviton's submetering page lists Modbus RTU, Modbus TCP and, on the advanced meters, BACnet. The Series 7000 monitor supports all four of Modbus RTU, Modbus TCP, BACnet MS/TP and BACnet/IP, is line powered from 90 to 600 Vac, takes split-core or Rogowski CTs for 5 to 4000 A and has a USB port for local configuration, according to its product page.

The Series 4000-K is documented in detail. Its installation guide ZL0138-0A gives 2-wire RS-485 Modbus RTU from 1200 to 38400 baud (factory address 1, 19200 baud, no parity), CT inputs of 0.333 V or 1 V for primaries from 5 A to 32,000 A, and voltage inputs from 90 V line to neutral up to 600 V line to line. The point map numbers registers from 001 and publishes every quantity twice: as a 16-bit integer with power-of-ten scale registers, and as a 32-bit float from register 257. The guide's product identification table gives the meter the part number E50C2, and its map follows the same layout as the Veris Industries E50C2. Approvals in the guide are cULus to UL 508, CE and California Solar Initiative listing.

Accuracy statements differ by document. The June 2023 product data sheet rates the kits to ANSI C12.20 Class 0.2 and IEC 62053-22 Class 0.5S, while the 2014 installation guide states 0.5% real energy accuracy. The older Series 3500 pages cite ANSI C12.1 and a 0.5% accuracy class.

On the residential side, the Whole Home Energy Monitor and smart breakers report through the My Leviton cloud app, which CE Pro describes as handling remote switching, scheduling and automatic shedding of non-essential loads through a transfer-switch contact. Leviton publishes no local API for these products. The EV48W charger lists OCPP 1.6 compliance among its standards, alongside UL 2594 and Energy Star.

Security is the weak point of the record. In July 2025 CISA advisory ICSA-25-198-01 disclosed a cross-site scripting flaw, CVE-2025-6185 with a CVSS v4 score of 8.7, in the AcquiSuite A8810 and Energy Monitoring Hub A8812 data acquisition servers, and reported that Leviton had not responded to its requests to coordinate a fix.

Markets

VerifEye is aimed at North American commercial and multifamily buildings. The submetering page positions it for tenant billing, cost allocation across tenants and spaces, measurement and verification, and compliance with LEED v5, IECC, ASHRAE 90.1 and California Title 24, and the software adds local rules such as the Seattle Energy Code and New York Local Law 88. The approvals follow that market: ANSI accuracy classes, UL and cUL listing, NEMA enclosures and US service voltages from 120 V to 480 V, and the 73D48 branch monitor is described as Buy American Act compliant with the United States as its country of origin.

The products reach installers through electrical distributors and Leviton's own online store, the same route as its wiring devices. Leviton also runs Leviton LIVE experience centres in Chicago, Nashville and Lake Nona, Orlando, and CE Pro noted that the 2023 smart breaker launch followed the opening of the Lake Nona centre.

The residential energy products sell to homeowners through electricians. When the first Smart Load Center launched at the International Builders' Show in 2019, Pro Remodeler put a full smart system for a typical 2,500 square foot home at roughly US$2,500 to US$4,000 installed, and noted that existing Leviton panels can be upgraded with a data hub and smart breakers. The 2023 generation extends that to solar, battery and generator monitoring, which puts Leviton in the home electrification market alongside its EV chargers.

Outside North America the company is mainly a cabling and wiring device supplier. Its locations page lists offices in the United Kingdom, France, Germany, Italy, Spain, Sweden, Mexico, Colombia, South Korea, China and the United Arab Emirates, with the European Network Solutions site in Glenrothes, Scotland. VerifEye's published approvals are North American (ANSI, UL and cUL) and do not include MID, so European billing projects would normally look elsewhere for meters.

Company

Leviton Manufacturing Co., Inc. is privately held. Harold Leviton became chief executive and president in 1965; after his death Donald Hendler took over in 2004, and in 2021 Hendler became chairman and Daryoush Larizadeh was appointed chief executive and president, according to the company history. Headquarters moved from Manhattan to Brooklyn, then to Little Neck, Queens, and in 2009 to 201 North Service Road, Melville, on Long Island, which the locations page gives as the global headquarters.

Growth has come largely through acquisitions. Alongside the 2011 purchase of Obvius, Leviton bought Home Automation Inc. of New Orleans in 2012 and ran it as HAI by Leviton, a separate unit reporting to Larizadeh; Residential Systems noted plans to pair HAI's smart grid products with Leviton's submetering. The history page records Brand-Rex in 2015 and Berk-Tek in 2020, and the locations page lists the ConTech, Birchwood, Intense and JCC lighting brands.

The Berk-Tek deal is the largest with published terms. Nexans agreed in July 2020 to sell the US network cable maker, with about 350 employees and plants in New Holland, Pennsylvania and Fuquay-Varina, North Carolina; CE Pro reported a price of US$202 million and Berk-Tek 2019 sales of US$163 million.

Leviton publishes no revenue or headcount figures of its own. Its About page cites 120 years of operation and a target of company-wide carbon neutrality by 2030. Its locations page lists sites across the United States, Canada, Europe, Mexico, Colombia, South Korea, China and the United Arab Emirates, including the former Berk-Tek plants and a Mexico City distribution centre.