Could be a replacement for traditional UPS
FlexGen Power Systems and Rosendin have partnered on the development of a utility-scale Battery Energy Storage System (BESS) designed to replace traditional UPS infrastructure in data centers.
The partnership will combine FlexGen’s energy management software and BESS technology with Rosendin’s expertise in electrical systems and data center construction.
The project proposes an integration of Rosendin’s BESSUPS system and FlexGen’s proprietary energy technologies, including its Soft Grid interconnection and Island Grid transient frequency stabilization systems. It will also utilize FlexGen’s HybridOS energy management platform to optimize system performance.
Pasi Taimela, FlexGen’s chief innovation officer, said: “This effort with Rosendin enables us to bring to market a smarter, leaner, and more responsive approach to data center energy design that doesn’t require any redesigns inside the walls of the data center - one where battery systems provide both power quality and grid services without compromise."
The system under development will be placed outside the confines of the data center, connecting at medium-voltage - of between 1,000V to 35,000V - which will allow it to act as an alternative to traditional UPS systems.
The companies claim that the configuration will reduce capital expenditure and system complexity while providing uninterrupted, utility-grade power without relying on traditional diesel generators. The BESSUPS design can also dispatch power back to the grid on demand, which can support utility-scale power management and decarbonization goals.
The companies are currently conducting grid-connected tests to demonstrate proof of concept. They are also working with OEMs on firmware enhancements to ensure the system can function as a seamless UPS replacement.
The additional testing aims to validate the system’s ability to support critical loads, improve resiliency, and switch between grid-connected and islanded modes without disruption.
Bill Mazzetti, SVP at Rosendin, said: “Data center developers are looking for scalable and flexible power solutions that don’t compromise on performance. With FlexGen’s Innovation Lab and our experience in building complex electrical systems, we’re positioned to validate a solution that helps our clients build faster, smarter, and with more confidence.”
Rosendin, which is headquartered in San Jose, California, is one of the largest electrical contractors in the US. Its energy subsidiary, Rosendin Energy Group, has installed almost 9GW of power capacity in the US market and offers construction services across the sector, including power generation and transmission infrastructure.
FlexGen is headquartered in Durham, North Carolina. The company provides software and services for the management and optimization of BESS systems. It aims to provide data center operators with turnkey solutions for the integration of BESS within data center architecture to support faster interconnection and better power quality.
