Senior Accountant
BW Energy Storage Systems
Company Overview
BW Energy Storage Systems, a subsidiary of BW Group
HeadquartersSingapore
Founded2020
SizeApproximately 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
We are seeking an experienced Senior Accountant to support the VP - Finance in Melbourne.
This is a technical role ideal for a CA or CPA qualified professional with 5+ years of experience with strong technical accounting skills.
You will own the integrity of the books, month-end and year-end close processes, and tax compliance across our corporate and project entities. You will partner closely with the wider finance team to ensure accurate financial reporting, tax compliance, and strong financial controls that underpin investment decisions across our portfolio of BESS assets.
Key Responsibilities
Accounting Operations
- Own the month-end and year-end close process, including journal entries, accruals, and prepayments.
- Maintain the general ledger and chart of accounts across corporate and project entities, ensuring accuracy and completeness.
- Perform and review balance sheet and bank reconciliations, including intercompany reconciliations across a multi-entity structure.
- Prepare monthly, quarterly and annual financial statements in compliance with AASB and IFRS.
- Manage accounts payable, accounts receivable, and payment processing; review and optimise AP/AR workflows.
Technical & Asset Accounting
- Own the month-end and year-end close process, including journal entries, accruals, and prepayments.
- Maintain the general ledger and chart of accounts across corporate and project entities, ensuring accuracy and completeness.
- Perform and review balance sheet and bank reconciliations, including intercompany reconciliations across a multi-entity structure.
- Prepare monthly, quarterly and annual financial statements in compliance with AASB and IFRS.
- Manage accounts payable, accounts receivable, and payment processing; review and optimise AP/AR workflows.
Tax & Compliance
- Own the month-end and year-end close process, including journal entries, accruals, and prepayments.
- Maintain the general ledger and chart of accounts across corporate and project entities, ensuring accuracy and completeness.
- Perform and review balance sheet and bank reconciliations, including intercompany reconciliations across a multi-entity structure.
- Prepare monthly, quarterly and annual financial statements in compliance with AASB and IFRS.
- Manage accounts payable, accounts receivable, and payment processing; review and optimise AP/AR workflows.
Analysis & Support
- Prepare accurate actuals, reconciliations, and supporting schedules to enable forecasting, lender reporting, and portfolio performance analysis.
- Identify, document, and recommend improvements to accounting processes, controls, and system integrations between energy management platforms and the ERP.
- Provide ad hoc financial analysis and decision support to the Finance team and the wider business.
Candidate Profile
- CA or CPA qualified with 5+ years of relevant experience in financial accounting and close processes
- Bachelor's degree in Accounting, Finance or related discipline
- Strong technical knowledge of IFRS, consolidations, and tax regulations
- Experience managing payables, receivables, bookkeeping and payments
- Excellent analytical and problem-solving skills
- Strong stakeholder management and communication skills
- Ability to work independently and improve processes and controls
- Advanced Excel skills and experience with accounting systems (e.g. Oracle, Xero, etc)
- Experience working in a fast-paced growth environment
- Experience with complex assets or infrastructure project accounting
- Knowledge of industry-specific accounting practices and regulations
- Energy sector experience or interest (desirable)
Apply now
Job expired?Please let BW Energy Storage Systems know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
Apply now
Job expired?Please let BW Energy Storage Systems know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
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About the role
July 30, 2026
July 31, 2026
Full time
On-site
Company
- Melbourne, Australia
5+ years
UTC+10:00
