BW Energy Storage Systems

Investment Associate

Join BW Energy Storage Systems in Melbourne as an Investment Associate. Lead financial modelling and transactions for large-scale battery projects, shaping Australia's energy storage investments. Benefit from a dynamic, high-accountability environment focused on accelerating renewable energy.

BW Energy Storage Systems

Company Overview

BW Energy Storage Systems, a subsidiary of BW Group

Singapore

2020

Approximately 30 employees (source: ess-news.com).

What They Do

BW Energy Storage Systems (BW ESS) specializes in battery energy storage systems (BESS), acting as a developer, owner, and operator of utility-scale projects that enhance energy market efficiency, integrate renewable energy sources, and stabilize electrical grids. The company focuses on large-scale BESS platforms that utilize advanced liquid-cooled technologies, such as Sungrow’s PowerTitan 2.0, which provide essential grid-forming capabilities including black start, millisecond inertia support, and frequency/voltage stabilization (source: bw-ess.com). These systems are designed for durations of up to 3.5 hours, enabling revenue generation through tolling agreements, frequency response, and energy arbitrage, particularly in deregulated energy markets across Europe and Australia (source: bw-group.com). BW ESS's strategic focus on long-term asset ownership rather than merchant sales allows it to serve grid operators, utilities, and energy traders effectively (source: bw-ess.com). The company leverages its backing from BW Group for funding and maritime expertise, which enhances its capacity for rapid project execution and innovative revenue models, positioning it as a leader in the energy storage sector (source: bw-group.com).

Projects & Track Record

As of early 2025, BW ESS boasts over 500MWh of operational BESS projects and more than 1GWh currently under construction, alongside a robust 7GW development pipeline (source: bw-group.com). A flagship project is the 100MW/331MWh Bramley BESS located near Bramley, Hampshire, UK, which became operational in early 2025, marking it as the largest battery energy storage system in the UK at that time and capable of powering approximately 44,000 homes daily (source: bw-group.com). Other significant projects include the Hams Hall site in the UK, which is currently under construction with a capacity of 1.4GWh, and the Berkswell site, which is at the ready-to-build stage (source: cbinsights.com). The company is also engaged in a 700MW/3.5-hour BESS portfolio in the UK, a 1.5GW collaboration with Zelos Energy in Germany, and multiple projects in Italy and Australia, significantly expanding its geographic footprint and operational capacity (source: bw-ess.com). Key clients include Shell Energy Europe, with whom they have a 7-year tolling agreement for the Bramley project, and partnerships with local developers to facilitate market entry (source: bw-group.com).

Recent Developments

In February 2025, BW ESS celebrated the inauguration of the 100MW/331MWh Bramley BESS, marking its first European project with Sungrow PowerTitan 2.0, under a groundbreaking 7-year tolling agreement with Shell Energy Europe established in 2024 (source: bw-group.com). In October 2024, the company made headlines by acquiring the remaining shares of Penso Power, thereby merging its team of nearly 30 specialists and adding a significant 2GW pipeline of projects in the UK and Australia, which contributed to a total pipeline of 5GW (source: ess-news.com). Additionally, BW ESS secured a 1.4GWh supply deal with Sungrow for the Hams Hall project and advanced joint projects in the UK and Italy (source: cbinsights.com). Recent announcements in 2025 included AIP Management acquiring a 49% stake in a 700MW/3.5-hour UK BESS portfolio and a collaboration with Zelos Energy Developments for a 1.5GW project in Germany (source: bw-ess.com). The Bramley project has been recognized as a significant milestone for enhancing UK grid resilience (source: bw-group.com).

Working There

BW ESS is actively hiring across various roles including project development, engineering, commercial operations, and business development, particularly following the integration of Penso Power in 2024, which enhanced their team with specialists focused on delivery and market entry (source: ess-news.com). The company is focusing its recruitment efforts on project sites in the UK, Australia, Italy, Germany, and Sweden, with a global team of nearly 30 supporting its multi-market expansion (source: bw-group.com). The culture at BW ESS is characterized by close-knit collaboration, as highlighted by CEO Erik Strømsø, who refers to the Penso teams as "trusted colleagues," fostering synergies in a fast-paced environment that navigates complex grid codes and local strategies (source: youtube.com). While specific benefits such as salaries or perks are not publicly documented, the long-term owner-operator model suggests a degree of stability tied to BW Group's extensive infrastructure expertise (source: bw-ess.com). Job seekers are encouraged to monitor LinkedIn for openings in Singapore and Europe as the company scales its operations to meet growing demand (source: linkedin.com).


Last updated on Feb 23, 2026 | Report an issue

BW ESS is a grid-scale energy storage owner-operator moving with speed to develop, build and operate market-leading battery projects. Our experience spans the development, delivery, and operation of major energy storage projects, working alongside best-in-class developers, suppliers, contractors, and financial institutions. As an active investor with development exposure, BW ESS has a strategy to hold assets for the long-term, taking a hands-on approach to unlock value throughout the energy storage asset lifecycle.

We are operational in the UK and Sweden, and active in Italy, Germany, Spain and Australia. We grow through partnerships with strong local developers and leverage BW Group's capital strength, supply-chain reach and decades in energy infrastructure. Our global development pipeline is ~9.5GW; in Australia we are advancing >2.6GWh of BESS opportunities.

Role Purpose

As BW ESS expands its Australian portfolio of battery energy storage projects, this Investment Associate role will play a key part in originating, evaluating and executing transactions across development, acquisition and capital recycling opportunities.

This is a commercially focused role with end-to-end transaction exposure. You will lead financial modelling and investment analysis, but also take ownership of structuring transactions, managing counterparties and supporting negotiations. Working closely with the Investment Director and global investment teams, you will help shape the Australian investment strategy, secure funding, and deliver disciplined capital deployment to maximise risk-adjusted returns.

Key Workstreams

Investment Execution & Financial Leadership

  • Lead the development and maintenance of advanced financial models for utility-scale BESS projects.
  • Drive detailed project valuations (DCF, IRR, NPV) to support investment, divestment and financing decisions.
  • Structure transactions across acquisitions, joint ventures and capital recycling processes.
  • Prepare and present investment committee materials, board papers and investor presentations.
  • Lead due diligence workstreams, coordinating internal technical, grid and commercial teams.
  • Support negotiation of key transaction documents including SPAs, DSAs, shareholder agreements and joint development agreements.

Market & Commercial Strategy

  • Analyse National Electricity Market (NEM) dynamics, including energy pricing, FCAS, capacity mechanisms and evolving market reforms impacting BESS revenues.
  • Translate market insights into commercial structuring decisions and investment strategy.
  • Assess regulatory developments, connection risk and revenue optimisation pathways.
  • Work closely with engineering and development teams to align commercial strategy with project design and grid strategy.

Capital & Stakeholder Engagement

  • Engage directly with investors, lenders and strategic partners throughout financing and transaction processes.
  • Support capital raising initiatives including debt and equity processes.
  • Evaluate investor proposals and provide recommendations on transaction structure and counterparties.
  • Manage external advisors (legal, technical, financial) to ensure timely and high-quality execution.

Portfolio Strategy & Business Partnering

  • Partner with senior leadership to prioritise the Australian investment pipeline and capital allocation.
  • Provide commercial insight into development-stage projects to optimise value ahead of FID.
  • Contribute to broader portfolio strategy, including divestment timing, partnership structuring and growth initiatives.

Candidate Profile

  • Degree qualified in finance, economics, engineering or a related discipline.
  • Experience within infrastructure, energy, renewables, private equity, investment banking or advisory.
  • Advanced financial modelling capability with strong commercial judgement.
  • Proven ability to take ownership of transactions from evaluation through execution.
  • Strong understanding of the Australian National Electricity Market (NEM) and revenue frameworks relevant to BESS.
  • Experience engaging with investors, lenders and external advisors.
  • Confident communicator, able to articulate complex commercial and financial concepts to senior stakeholders.
  • Comfortable operating in a lean, high-accountability environment with significant autonomy.

How We Work

Lean, talent-dense teams. Flexible people over fixed structures. Context over control. Results over process. Transparent, direct feedback. If you value high accountability and moving quickly to accelerate the energy transition, you will be at home here.

Apply now

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About the role

April 8, 2026

Full time

Company

April 8, 2026

Flexible

Energy Storage

BW Energy Storage Systems

bw-ess.com

  •  Melbourne, Australia

Mid-level to Senior

UTC+10:00