BW Energy Storage Systems

Portfolio FP&A Manager

Join BW Energy Storage Systems in London as a Portfolio FP&A Manager. Drive financial modelling and reporting for UK battery storage assets, supporting value creation. Benefit from a dynamic, inclusive culture and opportunities to work with cutting-edge energy storage projects.

BW Energy Storage Systems

Company Overview

Name

BW Energy Storage Systems, a subsidiary of BW Group

Headquarters

Singapore

Founded

2020

Size

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 global energy storage owner-operator, moving with speed to develop, deliver and operate market-leading projects.

The business is active in the UK, Australia, Italy, Germany, Spain, and Sweden. It has more than 540MWh of operating Battery Energy Storage Systems (BESS), with ~11GWh under construction and a development pipeline of several gigawatts.

Part of BW Group, BW ESS builds on decades of global infrastructure experience, takes a long-term view of projects and partnerships, and focuses on unlocking value throughout the energy storage asset lifecycle.

To find out more, visit: https://bw-ess.com/

Role Description

BW ESS is seeking a Portfolio FP&A Manager to support its growing UK operating BESS portfolio. The role will focus on financial modelling, non-statutory reporting, valuation and treasury analysis, working closely with Asset Management to monitor performance and support value creation across the portfolio. The role reports to the Director of FP&A and Treasury.

Core Responsibilities

Reporting & analysis

  • Own recurring non-statutory reporting for UK operating assets
  • Prepare monthly and quarterly packs for management, board, shareholder and lender requirements
  • Produce variance analysis versus budget, forecast and investment case
  • Develop and maintain portfolio KPIs, dashboards and reporting tools
  • Translate high-volume, often unstructured operational and market data into clean, decision-ready outputs

Forecasting & analytics

  • Own and maintain financial models of operational assets, improving robustness, consistency and automation over time
  • Update financial models for actuals, revised forecasts and operational assumptions
  • Model and monitor debt covenant compliance, headroom and forward projections at asset and SPV level
  • Support periodic asset valuation and impairment test analysis of the UK portfolio
  • Support annual budgets and periodic reforecasts by coordinating model inputs and mechanics
  • Work closely with the Asset Management team to monitor operational and financial performance
  • Identify trends, risks and opportunities across the portfolio that support value creation
  • Coordinate operational, financial and commercial data from multiple stakeholders
  • Support asset-level cashflow forecasting and liquidity analysis

Treasury & capital support

  • Support distribution planning and modelling, working with the Director of FP&A and Treasury on portfolio-level treasury strategy and execution
  • Assist in liaison with banks and investors on reporting, covenant and information requests
  • Track debt service metrics, reserve accounts and distributions at asset level
  • Weekly, monthly, quarterly cash snapshots

Transactions support

  • Ad-hoc support financial due diligence for new M&A opportunities and disposals as required

Data & process management

  • Improve consistency and scalability of reporting and modelling processes
  • Ensure reporting outputs are accurate, timely and internally consistent
  • Apply scripting or AI-enabled tools to improve reporting efficiency and analytical depth
  • Work effectively in a fast-changing environment with evolving data structures and priorities

Required Skills & Experience

  • Finance qualification, such as ACA, ACCA, CIMA or equivalent
  • 3+ years' relevant experience with budgeting, forecasting, valuation, impairment or covenant analysis, and management/performance reporting including lender and shareholder reporting
  • Comfortable working with operational and financial datasets from multiple systems
  • Strong Excel and presentation skills, with an eye for clear, concise data presentation
  • Organised, detail-oriented and process-driven, able to manage multiple models and recurring deadlines in a dynamic environment
  • Able to communicate complex financial and operational information to technical and non-technical stakeholders in a simple and concise manner
  • Experience in one or more of: project finance, battery storage, infrastructure, energy, renewables

Nice to Have

  • Practical experience with at least one programming/scripting language for analysis or automation, such as Python, VBA, or with AI-enabled analysis tools
  • Experience with SQL, data platforms, APIs or other structured datasets
  • Familiarity with BI / dashboard tools, such as Power BI, Tableau or Looker
  • Exposure to M&A due diligence or transaction support
  • Demonstrated use of AI tools to improve reporting speed, accuracy or analytical depth

How We Work

BW ESS culture and way of working is based on few clear foundations:

  • talent density over team size,
  • flexible people over fixed structures,
  • context over control,
  • results over processes,
  • transparent and clear feedback.

We welcome applications from candidates of all backgrounds and experiences, and we are committed to an inclusive hiring process that supports equal opportunity.

Apply now

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About the role

August 27, 2026

August 27, 2026

Full time

Flexible

Company

Energy Storage

BW Energy Storage Systems

bw-ess.com

  •  London, United Kingdom

3+ years

UTC+01:00