Podcast: Leading the battery storage race

❓ Question:

As governments introduce more supportive energy storage policies and Australia's electricity system continues to transition away from coal, what role do batteries play in renewable energy investing, and why are institutional investors paying closer attention to the sector?

✅ Answer:

According to Sonia Teitel, co-managing director of renewables at Octopus Australia, batteries are becoming a critical part of Australia's energy transition because they help solve one of the biggest challenges facing renewable energy: reliability. While solar and wind generation depend on weather conditions, batteries can store excess energy and release it when demand rises, helping create a more stable and flexible electricity system. Teitel argues that supportive government policies, strong market fundamentals, growing electricity demand and Australia's stable regulatory environment are strengthening the investment case for battery infrastructure and renewable energy portfolios.

🌟 Battery storage is becoming essential to the energy transition

Teitel explains that batteries play a vital role in transforming intermittent renewable energy into a more dependable energy source. They can absorb excess electricity generated during periods of strong solar output and release it during evening demand peaks. This ability to provide "firmed" renewable energy helps replicate some of the reliability traditionally delivered by coal-fired power stations, making batteries an increasingly important complement to wind and solar assets.

🌟 Australia is emerging as a global leader in battery deployment

While many investors often look overseas for examples of energy innovation, Teitel argues that Australia is setting the benchmark for large-scale battery deployment and optimisation. She believes international markets are increasingly studying Australia's approach to battery storage, particularly the way batteries are used to provide network support services and improve electricity system performance.

🌟 Institutional investors are attracted to strong long-term fundamentals

A key factor supporting investment is the retirement of Australia's ageing coal-fired power stations. As coal generation exits the market, new energy infrastructure must replace lost supply. Teitel says this transition creates a compelling long-term investment opportunity, supported by government policies aimed at reducing carbon emissions while maintaining energy reliability. Australia's political stability and regulatory certainty further strengthen its attractiveness to institutional investors.

🌟 Battery projects generate value in multiple ways

Beyond storing electricity, batteries can create several revenue streams. They enhance renewable energy projects by helping deliver power when customers need it, they perform energy arbitrage by storing low-cost electricity and selling it during peak demand periods, and they provide ancillary services that support transmission network stability. These multiple revenue sources can improve investment outcomes and increase the attractiveness of battery assets within diversified portfolios.

🌟 AI and data centres are creating new demand for renewable energy

Teitel highlights the growing influence of artificial intelligence and data centres on Australia's energy landscape. As large technology companies expand their infrastructure requirements, demand for reliable electricity is expected to increase significantly. Government plans requiring some data centre developments to secure firmed renewable energy contracts before receiving approval could further support investment in renewable generation and battery storage assets.

🌟 Diversified renewable portfolios may deliver stronger outcomes

Rather than viewing battery, wind and solar projects as separate investment opportunities, Teitel advocates for a portfolio approach. Combining multiple technologies across different regions can help manage risk, improve reliability and better align electricity supply with customer demand. She argues that this integrated approach may be more effective at generating long-term investment returns than relying on individual asset types.

🚩 Infrastructure development remains complex and execution-focused

Building large-scale renewable and battery infrastructure requires significant expertise. Teitel notes that investors need to assess whether project developers have the capability to manage construction, secure transmission access, negotiate offtake agreements and operate assets effectively. Transmission capacity constraints can also influence project economics and investment outcomes.

🚩 Choosing the right portfolio matters more than selecting individual technologies

Teitel cautions against focusing too heavily on whether a single wind, solar or battery project will outperform another. Instead, investors should evaluate how assets work together within a broader portfolio to provide customers with reliable electricity and generate sustainable long-term returns.

⚠️ Australia still needs significantly more renewable energy infrastructure

Despite favourable policy settings, Teitel believes renewable energy deployment is not yet occurring at the pace required to support future electricity demand. Coal generation is steadily leaving the system while AI-driven demand growth continues to emerge. Failure to accelerate renewable and storage investment could place additional pressure on energy supply and affordability.

⚠️ Network constraints can affect project viability

Battery and renewable projects depend on access to transmission infrastructure. Investors who overlook network limitations and grid connection challenges may face delays, increased costs or reduced returns. Understanding where projects are located and how they connect to the electricity system remains an important part of investment due diligence.

🌟 Looking ahead, Australia could be entering a major growth phase for renewable investment

Teitel believes the combination of supportive government policy, rising electricity demand from AI and data centres, the retirement of coal generation and growing investor interest is creating favourable conditions for renewable energy investment. She argues that investors entering the sector today have an opportunity to participate in what could be a decades-long period of energy infrastructure growth and transformation.

💡 Why it matters:

Battery storage is rapidly moving from a niche technology to a core component of Australia's electricity system. As governments pursue decarbonisation goals and demand for electricity continues to rise, investors are increasingly looking at how batteries, wind and solar assets can work together to deliver reliable energy. Teitel's insights highlight how the investment discussion is evolving beyond renewable generation alone toward building integrated energy systems capable of supporting future economic growth. For institutional investors, battery storage may become one of the defining infrastructure opportunities of Australia's energy transition.

🎙️ Sources:

• Sonia Teitel, co-managing director, renewables, Octopus Australia

• Michelle Baltazar, host, The Greener Way

⏱️ Timestamps:

00:00 - Why Australia is leading battery deployment

00:18 - Introduction and Chris Bowen's battery storage comments

01:33 - Octopus Australia's renewable energy portfolio

03:00 - How government policy influences investment decisions

04:18 - Australia's growing battery storage market

05:00 - How battery assets create value for investors

06:20 - Network support and ancillary services

06:39 - Why other markets are learning from Australia

07:33 - AI, data centres and future energy demand

08:38 - Risks investors should understand

10:00 - Why portfolio construction matters

10:47 - Investment opportunities over the next decade

11:42 - Balancing long-term returns and energy transition goals

12:02 - Key messages for superannuation investors

12:34 - Why now may be the opportunity to invest

13:05 - Final reflections on Australia's renewable energy future

🌿 We record on Gadigal Land and pay our respects to the traditional custodians of country and elders past and present.