Battery Energy Storage System (BESS)
Resilient, Cost-Optimised & Grid-Supporting Energy Storage
Hasilwan provides Battery Energy Storage System (BESS) solutions that strengthen energy resilience, reduce operating cost exposure, and support stable power performance across commercial, industrial, infrastructure, and utility environments. Energy storage plays a critical role in enabling a sustainable energy ecosystem capturing and utilising energy generated on-site while enabling seamless energy conversion. With end-to-end delivery from preliminary studies and cost-benefit analysis to full system implementation, we ensure storage projects are designed for measurable operational value and maximum return.
Commercial Value & Operational Impact
BESS sizing and operating strategy are designed around your facility’s load profile and objectives such as reducing Maximum Demand exposure, improving reliability, or enabling after-hours energy use.
Safe Integration & System Reliability
We engineer battery systems to integrate safely with facility networks, microgrids, or grid-connected setups ensuring stable operation, controlled discharge/charge behaviour, and reliable response when needed.
End-to-End Delivery & Lifecycle Readiness
Hasilwan provides comprehensive solutions from preliminary studies and cost-benefit analysis to fully equipping your project so your system is built for long-term performance and return on investment.
What We Deliver
Peak Shaving & Maximum Demand (MD) ReductionFor commercial and industrial customers aiming to control demand peaks and reduce utility charges.
For commercial and industrial customers aiming to control demand peaks and reduce utility charges.
- Peak shaving strategy design and operating configuration
- MD reduction planning and demand profile optimisation
- Control integration and performance validation
Spinning Reserve Displacement & Operational Efficiency For grid and generation environments seeking improved operational efficiency and smoother response during low supply periods.
For grid and generation environments seeking improved operational efficiency and smoother response during low supply periods.
- Battery dispatch strategy to support smoother operation during low supply periods
- Energy efficiency impact planning aligned to operating objectives
- Integration engineering and performance verification
Flexible Commercial Models (Where Applicable) For customers seeking storage adoption with lower upfront investment barriers.
For customers seeking storage adoption with lower upfront investment barriers.
- For customers seeking storage adoption with lower upfront investment barriers.
- ESS solutions with minimal upfront cost (technology options include BESS and Hydrogen storage)
- Commercial structuring aligned to project objectives and site constraints
UPS Mode & Critical Backup Power For facilities requiring continuity for critical loads during outages or transition events.
For facilities requiring continuity for critical loads during outages or transition events.
- UPS mode configuration for critical equipment support
- Backup support planning for safe shutdown or continued operation until generator start-up
- System testing and commissioning for reliability response
Off-grid & Microgrid Energy Storage For remote and reliability-critical sites where energy security and unit energy cost matter.
For remote and reliability-critical sites where energy security and unit energy cost matter.
- Utility-scale development support & project delivery
- Grid interface engineering & compliance coordination
- Plant electrical design, protection, & system integration
- Track record includes development & investment in 100 MWp+ solar capacity through national programmes & initiatives
Where BESS Is Applied
Battery storage delivers the most value where reliability, cost exposure, and operational continuity are critical.
Where BESS Is Applied
Battery storage delivers the most value where reliability, cost exposure, and operational continuity are critical.
Compliance & Standards
Hasilwan’s BESS delivery is engineered to meet applicable regulatory, utility interconnection, and electrical safety requirements for the project environment covering safe integration, protection coordination, and operational reliability.
Project Highlights
Faber Castell Factory, Subang Jaya
Off-Grid TNB HQ Fleet
Engage With Our Team
Discuss your BESS requirements: peak shaving, MD reduction, UPS backup, or microgrid/off-grid storage with our engineering specialists.