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Accredited Testing for Demand Response Communication

Certify product compliance with the Open Automated Demand Response (OpenADR) and EcoPort (CTA-2045) protocols through accredited testing at UL Solutions.

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Overview

As energy grids evolve to integrate renewable resources and distributed energy assets, demand response (DR) has become a critical strategy for balancing supply and demand.

As an ISO/IEC 17025-accredited testing laboratory, UL Solutions is authorized to certify products for both OpenADR and EcoPort (CTA-2045) communication protocols. Compliance with these leading protocols helps manufacturers support reliable DR, interoperability, regulatory readiness and market access.

What is demand response?

DR refers to programs that adjust electricity consumption during peak periods or grid stress events. By signaling connected devices to reduce or shift energy use, DR improves grid reliability, supports renewable integration and helps consumers save on energy costs.

DR communication protocols

OpenADR Protocol

OpenADR is a global, nonproprietary communication protocol that automates DR and distributed energy resource (DER) management. It enables utilities, system operators and aggregators to send standardized signals to energy management systems and connected devices, allowing them to respond to dynamic pricing or grid events.

Primary function: Communicates event and pricing signals between utilities and end devices
Applications: Building management systems, electric vehicle (EV) chargers, thermostats, lighting controls, industrial equipment

EcoPort (CTA-2045) Protocol

CTA-2045, branded as EcoPort, defines a modular communication interface for appliances, enabling direct connectivity to energy management systems. Often described as a “USB for appliances,” it allows plug-in modules to provide DR functionality without redesigning the appliance.

Primary function: Physical interface for DR signals to reach appliances
Regions: Widely adopted in North America, Europe and Asia. Recognized as IEC 62746-10-1
Applications: Heating, ventilation and air conditioning (HVAC) systems, water heaters, pool pumps, EV chargers and other large-load devices

What are the key differences?

	OpenADR	EcoPort (CTA-2045)
Role	Communication protocol for DR signals	Physical interface for appliance connectivity
Scope	Utility-to-device messaging	Appliance-level modular communication
Typical devices	Energy management systems (EMS), thermostats, EV chargers	Water heaters, HVAC, pool pumps

Together, these protocols enable a complete DR ecosystem: OpenADR delivers the signal, while EcoPort allows devices to respond.

Why choose UL Solutions?

One accredited path for both standards: Our laboratory is accredited to certify compliance with both OpenADR and EcoPort (CTA‑2045) — allowing manufacturers to complete testing and certification for both protocols in one place, with a streamlined path to market.
Comprehensive testing: We verify interoperability, security and functional performance against protocol specifications.
Global Market Access: Certification supports compliance with regulatory requirements and utility programs in North America and beyond.
Expert guidance: Our team collaborates with manufacturers from design through certification.

Ready to certify your product?

Contact UL Solutions to begin the certification process.

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