Commercial and industrial (C&I) CER has the potential to unlock multiple value streams, including retail tariff optimisation, allowing greater self-consumption from onsite generation, RCM participation, IRCR peak management, NCESS tenders, and tailored network support arrangements with Western Power. The specific options available depend on factors such as dispatchable capacity, operational flexibility, and the ability to meet WEM requirements for telemetry, performance, and compliance.

CER is expected to play an increasingly important role in Western Australia’s energy transition by supporting grid reliability and enabling greater market flexibility. Recent reforms have expanded participation pathways and clarified compliance requirements, but uptake to-date has been uneven, reflecting the costs, complexity, and operational challenges faced by many sites.

In addition to direct participation, C&I sites may partner with aggregators or service providers to meet participation thresholds and simplify engagement. Aggregation can enable coordinated participation across mechanisms such as RCM, IRCR, and NCESS, and may improve the commercial viability of CER investments where multiple value streams can be accessed.

CER strategy development is not without challenges. Common barriers include customer education, cost and complexity of telemetry upgrades, and managing participation alongside core site operations.

Key points

• Commercial and industrial CER can create value through capacity payments, peak-demand management, network services and retailer programs.
• Batteries, controllable generation and flexible loads may participate directly or through a retailer or aggregator.
• Capacity Credits reward eligible resources for providing reliable peak or flexible capacity.
• IRCR optimisation reduces a customer’s share of Reserve Capacity Mechanism costs rather than creating a separate market payment.
• Network Support Services may be procured through targeted NCESS arrangements.
• Technical requirements vary according to the service and may include facility registration, metering, telemetry, dispatch control and performance testing.

How can C&I providers earn Capacity Credits?

Under the RCM, C&I customers and service providers can earn Capacity Credits by providing firm capacity to the SWIS during periods of peak demand. Capacity Credits can offer a stable revenue stream and are allocated annually based on accredited capacity. Recent WEM reforms have introduced a flexible capacity credit alongside traditional peak capacity credits.

Flexible capacity credits rewards resources that can rapidly respond to changing system conditions, such as batteries, demand response, and flexible loads, helping to manage variability from renewables and minimum demand events. The introduction of flexible capacity credits under the WEM Reform Program is about valuing CER flexibility, recognising its role in mitigating system peaks, as well a minimum system load.

The RCM remains one of the most material value streams for large C&I customers. Participation can occur through on-site storage, controllable generation, or flexible load registered under the relevant WEM facility class. C&I facilities may be accredited to provide capacity via dispatchable resources or through demand-side capability under the DSP framework.

For most industrial sites, RCM value is realised either through participation via their retailer or by having a resource registered as a “facility” by a market participant acting on their behalf. This typically requires compliance with accreditation standards, performance tests, telemetry obligations and witness testing of performance. Eligibility for peak capacity credits and flexible capacity credits depends on meeting technical, telemetry, and performance standards set by AEMO, with obligations for availability, responsiveness, and compliance.

As the WEM transitions to a higher renewable penetration, the importance of flexible load and distributed storage in delivering capacity is expected to increase, presenting growing opportunities for C&I CER.

IRCR optimisation (peak demand management) for C&I

The IRCR remains one of the most influential cost drivers for large energy users. C&I customers can materially reduce capacity charges by lowering demand during the IRCR intervals that set future-year liabilities. For many businesses, IRCR optimisation provides a larger financial impact than energy arbitrage or demand response payments, making it a central focus of load-management strategies.

C&I CER assets such as batteries, thermal storage, backup generation and flexible processes can be optimised to reduce IRCR liabilities. Retailers and service providers offer tailored services such as forecasting IRCR intervals, dispatching assets and verifying performance. As industrial processes electrify and system peaks continue to shift, IRCR cost management is expected to remain one of the primary CER participation pathways for C&I sites.

Advanced forecasting tools and analytics are increasingly used to predict IRCR intervals, enabling businesses to optimise their response and maximise cost savings. Accurate metering and compliance with AEMO’s IRCR methodology are essential for verification and effective participation. Aggregators and service providers can also combine multiple sites or assets to deliver coordinated IRCR optimisation across portfolios.

Network support services via NCESS participation

Western Power can procure network support services via the NCESS framework to address local constraints, minimum system load, system strength, and reliability risks in the SWIS.

C&I customers with flexible load, on-site generation or BTM storage may be contracted to provide targeted support, such as load reduction, voltage support, or rapid discharge during minimum-demand events. These arrangements differ from wholesale market participation and are based on published guidelines and rules to address system needs.

For many industrial users, NCESS provides a commercially attractive value stream because it rewards operational flexibility and technical capability, rather than exposing participants to wholesale price volatility. As the SWIS experiences increasingly variable operating conditions, the importance and value of these services to support Western Power’s network needs are expected to grow.

Retailer programs

C&I customers in the SWIS can unlock wholesale market value through tailored programs offered by retailers and specialist service providers. These programs can leverage CER assets to manage spot market exposure, reduce hedging costs, and optimise participation during peak pricing or supply-demand imbalances.

Retailers may dispatch customer assets for arbitrage, price-responsive load shifting, or high-price-event management. These offerings are highly customised, depending on the customer’s operational flexibility, metering configuration, and willingness to accept price signals. As retailers expand their capabilities under the WEM Reform Program, these models are expected to become more sophisticated and accessible for C&I customers.

Demand response is a key participation pathway, rather than a standalone market. Participation is possible via retailers or specialist aggregators and is typically rewarded through peak capacity credits, NCESS or bespoke retailer arrangements.

In the WEM, effective demand response requires predictable reductions against agreed baselines, supported by robust verification processes and high-quality data. As reforms to ESS frameworks progress, demand response is increasingly valued for supporting system stability, such as by helping maintain frequency within allowable limits and providing rapid load reduction during contingency events such as generator trips or network faults. These evolving roles are driving performance expectations towards faster response capability and higher-integrity telemetry.

Technical requirements for C&I CER participation

Technical requirements for C&I CER participation in the SWIS are highly bespoke and depend on the specific value streams, market mechanisms, and operational context of each site. Unlike residential programs, which rely on standardised device lists and protocols, C&I participation is shaped by the scale and complexity of assets, the flexibility of industrial processes, and the ability to meet rigorous market and network standards.

Participation in mechanisms such as the RCM, IRCR optimisation, NCESS tenders, and retailer-led programs typically requires advanced metering, telemetry, and control systems capable of real-time response and verification. Sites may need to demonstrate dispatchable capacity, provide detailed performance data, and undergo periodic compliance testing to maintain accreditation. For network support and NCESS contracts, technical requirements are often tailored to the engineering needs of the location, such as voltage support, rapid discharge capability, or specific response times, making collaboration between the customer, technology providers and Western Power essential.

As the SWIS CER participation frameworks evolve, technical standards are expected to become more sophisticated, with increasing emphasis on interoperability, cybersecurity, and integration with market platforms. C&I customers and service providers should engage early with AEMO, Western Power, and their retailer or aggregator to establish all current and emerging technical, compliance, and performance requirements, and their implications, prior to committing significant resources.

Related articles

• Participating in the Western Australian Electricity Market
• Key market mechanisms and structures
• Residential and small customer CER participation
• Participating in the National Electricity Market