Categories > Energy Monitoring Devices & Svs

2013 Product of the Year Winner

Crestron GLS-EM-MCU Crestron Green Light® Power Meter

MSRP: $1,200.00

Crestron’s new GLS Power Meter (GLS-EM-MCU) takes that popular buzzword ‘energy management’ that everyone else talks about, and does measurable and quantifiable things with it. Power Meter logs overall electricity usage in real-time, enabling homeowners to accurately measure, monitor, and manage all electricity coming into the dwelling.

Mounted next to a standard breaker panel, Power Meter measures amperage and voltage down to the branch circuit level to calculate exact usage in kilowatt hours. Actual usage data is then automatically transferred to a Crestron control system over Ethernet where it can be displayed on a Crestron touchscreen, laptop, or mobile device for easy viewing and analysis.

Power Meter is designed as part of a complete, whole home energy management system. Real-time and historical energy consumption data is collected by Power Meter and displayed in easy-to-read color graphics using Fusion EM® software. Armed with tangible data, rather than estimates, intelligent energy savings decisions can be made.

Utilizing three-phase monitoring, by tracking individual branch circuits the Power Meter system provides more detailed energy usage data than similar solutions. The main Power Meter control unit monitors both voltage and current (ie. amps). This level of monitoring provides complete and accurate statistics of a home’s total electricity consumption. To achieve this, Power Meter connects to line voltage of each phase (up to 3) and neutral. Crestron Current Transformers (GLS-EM-CT) clamp around each of the incoming feed wires. These CTs then get wired into Power Meter’s inputs. With the voltage and current data, Power Meter calculates exact power usage.

Combined with Crestron lighting control systems, controllers, dimmers, switches, DALI ballasts, keypads, sensors, thermostats and software, integrators can now offer homeowners a complete energy management system that integrates seamlessly with the entire home on one platform.

Learn more about GLS-EM-MCU Crestron Green Light® Power Meter.
Download product spec sheet.


A key component to a complete energy management and monitoring solution, the GLS Power Meter sets itself apart in several ways.
  1. Three-Phase Monitoring: By tracking individual branch circuits, the Power Meter system provides more detailed energy usage data than similar solutions. How? The main Power Meter control unit monitors both voltage and current (ie. amps). This level of monitoring provides complete and accurate statistics of a home's total electricity consumption. To achieve this, Power Meter connects to line voltage of each phase (up to 3) and neutral. Crestron Current Transformers (GLS-EM-CT) clamp around each of the incoming feed wires. These CTs then get wired into Power Meter's inputs. With the voltage and current (amps) data, Power Meter calculates exact power usage.
  2. Current Transformers: Current transformers are vital to metering power. Crestron's whole-home energy management solution offers a choice of split core models that work with 600, 400, and 200 Amp feeds; these devices clamp around main feeds. Solid-core models are available for 50 and 20 Amp circuits.
  3. Individual Branch Monitoring: Homeowners often want to monitor consumption by area or by device. Power Meter, in conjunction with the GLS-EM-CTI current transformer interface, enables metering of multiple branch circuits. Up to four CTIs can connect to a single Power Meter for monitoring up to 84 branch circuits.
  4. Real-time and Logged Data: Inherent to the GLS-EM-MCU is the ability to provide both real-time and logged power usage data. Real-time data can be used on touch screens or mobile devices to show instantaneous usage. The energy usage screen within Fusion EM software provides attractive charts and graphs that illustrate the facility's energy consumption. Additionally, logged data can be shared with Fusion EM for more detailed reporting. The GLS-EM-MCU stores the logged data in non-volatile memory to prevent data loss.


The Crestron Power Meter measures voltage, current, real power, reactive power, power factor, and actual usage in kilowatt hours. No other metering product provides this level of measurement, nor works in a fully integrated home automation environment. Precise readings are displayed graphically in a variety of colorful charts, meters, and customized reports in Fusion EM® Energy Management software. Accurate energy consumption data can now be easily analyzed, scrutinized and acted upon to provide substantive and measurable energy savings throughout the dwelling.

Installation is simple with minimal wiring required. Whether a split-phase or a 3-phase system, simply clamp a Crestron Current Transformer (CT) onto the main feeds coming into the house, then connect the CT to Power Meter. CTs measure amperage and simultaneously communicate readings directly from the breaker box to the Power Meter. To read voltage, breakers are wired to the voltage inputs on Power Meter. It's that easy.

With home automation clients focused on energy savings and green strategies, integrators can now deliver a complete energy solution. Combined with Crestron thermostats, lighting control systems, dimmers, switches, keypads, sensors, and software, integrators can offer homeowners a complete energy management system that integrates seamlessly with the entire home on one platform.

Company Info

Crestron is a leading manufacturer of advanced control and automation systems, innovating home technology to simplify and enhance modern lifestyles. Crestron integrated solutions control audio, video, home theaters, HVAC, lighting, energy management, security, and other connected home systems from easy-to-use touch screens, mobile devices, handheld remotes, and keypads.

15 Volvo Drive
Rockleigh, New Jersey
United States of America

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