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Commercial Battery Revenue Stacking: Spot Market Access & Demand Management – Optimising a Multi-Tenant Site (Part 5)
A commercial battery’s financial performance is determined less by the hardware and more by the commercial architecture it operates within. At this Charlestown site, two 225kWh Battery Energy Storage Systems (BESS) are each connected via a child meter to one of two separate embedded networks. The child meter mechanism and spot market access strategy are covered in Part 1 of this series. This video focuses on what that looks like in practice on real hardware, and on the two additional value streams layered on top: network demand tariff management, and a provisioned pathway for future revenue participation that requires no modification to the installed infrastructure.
Key Insights
A child meter on an embedded network is the commercial foundation that makes revenue stacking possible.
Without this metering structure, the battery operates against a retail tariff and captures only one margin. With it, multiple value streams can run on the same asset simultaneously. See Part 1 of this series for a full explanation of how child meter access works.
Demand management and spot market arbitrage can be value-stacked on the same asset.
When network demand approaches a threshold that would trigger a higher tariff, the batteries discharge to suppress it, reducing the site’s network charge exposure without disrupting the spot market strategy running in parallel.
Designing for future revenue participation at installation costs far less than retrofitting it later.
At this site, the infrastructure required to participate in FCAS as an additional revenue stream is already built in. Activating it requires no modification to the core BESS hardware or metering architecture.
Integrating the battery fire signal into the building management system removes dependency on isolated monitoring.
NGG connected the BESS smoke detectors and temperature sensors directly into the building’s fire indicator panel, routing any battery alarm through the same channels used for all other building safety events.
Commercial Battery Revenue Stacking in Practice
Part 1 of this series covered the commercial logic behind child meter access on an embedded network and why it increases battery returns by 25-100% compared to a standard retail tariff structure. This last video of the series is the on-site proof of that architecture operating on real hardware.
At this Charlestown site, two 110kW / 225 kWh batteries each sit behind a dedicated child meter connected to one of two separate embedded networks on the site. The two systems are mirror configurations, operating independently but in the same fashion. Each has direct access to wholesale spot price signals, which govern when the batteries charge and discharge. The metering cubicles housing these connections are compact, purpose-built, and designed to remain accessible for ongoing maintenance and future modification.
What this video demonstrates is what that configuration looks like once it’s installed, commissioned, and running. The hardware is simpler than most people expect. The intelligence sits in how it’s connected.
Demand Management in Addition to Spot Market Access
The spot market strategy is the primary revenue driver, but it isn’t the only commercial mechanism these batteries operate under. The batteries are also configured to monitor network demand on each embedded network. When demand approaches a level that would trigger a higher network tariff, the batteries discharge to bring consumption below that threshold, avoiding the tariff uplift entirely.
These two mechanisms, spot market arbitrage and demand tariff management, run on the same asset simultaneously. The control system handles the prioritisation based on real-time price and demand signals. This is value stacking in practice: one physical installation, multiple independent revenue and cost-reduction streams, no conflict between them.
A third stream is provisioned into the site’s design. The infrastructure required to participate in FCAS sits alongside the existing metering cubicles and can be brought online without modifying the core BESS hardware. Decisions made at installation determine what a battery can do commercially for the life of the asset. The energy market doesn’t stand still, and the sites that will perform best over the next decade aren’t the ones with the biggest batteries. They’re the ones where the commercial architecture was designed ahead of the market, not just in response to it.
The views expressed herein are not necessarily the views of the Australian Government, and the Australian Government does not accept responsibility for any information or advice contained herein.
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Watch Next
This is the final video in the Charlestown series. Watch the earlier parts to follow the full journey from embedded network setup through to spatial engineering, switchboard conversion, and solar carport integration.
Optimising a Multi-tenant Site with Solar & Battery (Part 1)
Optimising a Multi-tenant Site (Part 2): Spatial Engineering & VPP Readiness
Optimising a Multi-Tenant Site (Part 3): Switchboard Conversion & Future-Proofing
Optimising a Multi-Tenant Site (Part 4): Maximising Solar Carport Site Footprint
What is the 30in30 initiative?
This video is part of Next Green Group’s 30in30 initiative. We’ve committed to deploying 30 Megawatt-hours of behind-the-meter commercial & industrial (C&I) battery storage across Australia over the next 30 months. We’re opening our internal playbooks to show C&I leaders the engineering and financial reality, empowering them to navigate the energy transition confidently.
Next Green Group is a vertically integrated energy solutions provider delivering complete asset lifecycle management. With 14 years of industry experience and more than 15,000 energy projects delivered, we bridge the gap between behind-the-meter energy infrastructure and front-of-meter wholesale market dynamics through our retail energy arm, Next Business Energy. We engineer, construct, and provide ongoing operations and maintenance for commercial energy assets to strict ISO & Australian standards. Backed by global powerhouse Sojitz Corporation, we combine this technical execution expertise with structured financing solutions to remove capital barriers and ensure long-term commercial performance.