EMS retrofit in as little as 8 weeks Transition battery energy storage assets from legacy or third-party energy management systems to HybridOS™ EMS without replacing core hardware infrastructure and unlock improved control, analytics, and fleet operations. Contact us Stability-first modernization Regain your competitive edge without disrupting energy dispatch behavior, site-level control logic, or safety systems. Learn from the experts Lab validation before field deployment FlexGen configures and tests the BMS, EMS, and PPC for each site virtually in our US-based Innovation Lab to minimize risk, validate controls, and reduce downtime. Go live in as little as 8 weeks Depending on site size and complexity, a retrofit can be completed in as little as 8 weeks, from intake through launch. Software-forward by design HybridOS™ EMS establishes an independent control layer that persists across hardware vendors, ensuring long-term system continuity and data ownership. With HybridOS™ Improved system uptime and operational reliability Unified control, analytics, and data historian in one platform Fleet-wide visibility across mixed-OEM portfolios Support for evolving grid requirements and market participation Legacy EMS Risk Compounding operational risk Third-party platforms aging out of support Vendor consolidation eroding hardware continuity Loss of data ownership across hardware transitions Loss of data ownership across hardware transitions Build a custom retrofit plan around your uptime 1 Retrofit intake and input A structured intake captures key technical, operational, and commercial site information. Outcome: Clear technical baseline and retrofit scope definition. 2 Site inspection and technical review An assessment to validate system configuration, communications architecture, safety requirements, and more. Outcome: Confirmed technical feasibility and retrofit execution plan. 3 Additional hardware requirements Evaluation of supplemental hardware requirements. Outcome: Finalized retrofit architecture and hardware scope. 4 Downtime planning and cutover strategy Retrofit schedules are designed to minimize disruption and align with site availability windows. Outcome: Clear timeline and downtime expectations prior to deployment. 5 Deployment, commissioning, and launch HybridOS™ is deployed, integrated, and commissioned on-site. FlexGen validates system performancebefore transitioning to full operational service. Outcome: Site live on HybridOS™ with validated performance and monitoring. 17 years of experience across energy markets 200+ Projects completed. Serving customers with unique needs including developers, IPPs, EPCs, utilities, munis, co-ops, data centers and more. 10+ Countries with active and contracted deployments. FlexGen supports a variety of energy projects across all 10 U.S. markets and internationally. 80+ Validated battery and PCS configurations. Every hardware combination is tested against HybridOS™ before it reaches your site — so you get proven performance, not field surprises. 25+ GWh completed and under contract. That’s enough storage capacity to provide electricity to 5 million average U.S. homes for 4 hours. Transition outdated software to the leading platform HybridOS™ EMS HybridOS™ goes beyond traditional energy management systems, combining commissioning features, site control, AI-powered analytics, and data access into a unified platform. Talk to an Expert Frequently Asked Questions What is a BESS EMS retrofit? An EMS retrofit replaces the software managing your battery energy storage site, without replacing core hardware. FlexGen transitions your site from a legacy or third-party EMS to HybridOS, unlocking improved control, analytics, and fleet operations. How long does an EMS Retrofit take with FlexGen? Depending on site size and complexity, we can complete an EMS Retrofit in as little as 8 weeks, from intake through launch. Will an EMS Retrofit disrupt my site's operations? Retrofit schedules are designed to minimize operational disruption and align with site availability windows. FlexGen's lab pre-integration resolves most issues before any on-site work begins. Does FlexGen work with all battery OEMs? FlexGen has validated HybridOS™ integrations across 80+ OEM configurations and supports mixed OEM portfolios. Will I need to replace hardware? In many cases, existing site hardware can be reused. Step 3 of the retrofit process evaluates whether any supplemental hardware is required before deployment. What happens after the EMS Retrofit is complete? FlexGen's lifecycle management services provide 24/7 remote monitoring from two US-based ROCs, fleet analytics through HybridOS™, and long-term augmentation planning.
