Gratte Brothers | Building Services Maintenance was engaged to deliver the replacement of two Uninterruptible Power Supply (UPS) systems for a major financial institution headquartered in London. The works formed part of the client’s broader strategy to improve energy performance, boost system resilience, and ensure long‑term reliability of their critical infrastructure.
Energy Efficient UPS Replacement
UPS Replacement for a Confidential Financial Institution
Project Information
- Client:
- Confidential Financial Institution
- Main Contractor:
- Gratte Brothers
- Sector:
- Financial Services
- Duration:
- 3 Weeks
- Services:
- UPS Replacement
Phased installation in a live environment
The programme involved removing two legacy UPS units and their associated battery systems, followed by the installation of modern MPW 300 UPS units paired with upgraded 90Ah battery banks.
To maintain uninterrupted services for building occupants, the works were delivered over two consecutive weekends. This phased approach enabled the safe isolation, decommissioning, installation and testing of each UPS without operational downtime. A soak test between phases validated system performance before proceeding with the second installation.
Upgrading and Integrating with Existing Infrastructure
Each phase required close coordination with the client’s facilities and building management teams. Activities included:
- Removal and installation of AC and DC cabling
- Integration of new DC isolator and string isolator panels
- Full commissioning and functional testing of both UPS systems
This ensured seamless integration with existing infrastructure and restored full resilience to the client’s critical power systems.
Improved Efficiency and Carbon Reduction
The newly installed MPW 300 units deliver an efficiency rating of approximately 95.9%, providing a substantial uplift in energy performance compared with the legacy equipment. This upgrade is expected to:
- Reduce annual CO₂ emissions
- Lower operational energy costs
- Strengthen resilience across critical systems
- Support the client’s ongoing sustainability commitments