BESS solutions for engineering, procurement, and construction firms The integration certainty and documentation support you need to deliver complex BESS projects on schedule, all with a single point of accountability: FlexGen. Talk to an expert Pre-Validated Integration What arrives on-site is already proven Integration issues discovered in the field are the single biggest source of schedule risk on BESS projects. By the time they surface, the damage to timelines and budgets is done. FlexGen’s Innovation Lab validates every hardware configuration, control narrative, and integration against HybridOS™ in a simulated grid environment before anything ships. What arrives on-site is already tested, documented, and ready to commission. Computer-based virtual testing of Modbus communications In-lab modeling and testing of unified AC+DC blocks Site-specific HybridOS™ control narratives validated before field deployment Automated test suites ready for deployment to additional blocks Software-Forward Flexibility Integrate any hardware. Protect your timeline. You don't always control hardware selection. When the OEM changes late in the procurement process, or the client switches configurations mid-project, the integration timeline is often the first to suffer. Because HybridOS™ is validated across 80+ battery and PCS configurations, FlexGen can support reliable integrations with whatever your project requires, without restarting the software process. One software baseline. Any hardware. No surprises at commissioning. 80+ validated battery and PCS configurations Pre-validated Modbus communications across OEM firmware versions Software integration unaffected by late hardware changes Full ITC compliance and supply chain traceability Market qualification test kits Documentation & Project Handoff Every deliverable your end client expects. A successful BESS project doesn’t end at mechanical completion. It ends when the client has everything they need to operate and finance the asset. Missing documentation or unresolved integration issues at handoff create liability long after the project closes. FlexGen works with the EPC early to define ownership across hardware, controls, communications, testing, and commissioning—reducing handoff gaps, EMS/ PPC integration ambiguity, and delivering audit-ready documentation at every project phase. Full integration test documentation from the Innovation Lab Standardized commissioning records at every phase ISO and utility qualification certificates HybridOS™ control narrative documentation HybridOS™: the integration layer EPCs rely on The most expensive BESS problems often surface during commissioning. HybridOS™, FlexGen’s energy management software, is pre-validated across 80+ battery and PCS configurations, giving EPCs a proven software baseline that integrates reliably, commissions predictably, and hands off cleanly to the end operator. Learn more about HybridOS™ EMS Solar controls HybridOS™ automatically manages state-of-charge to discharge during peak demand periods, reducing grid exposure and capturing revenue for the end operator. Micro grid controls Dynamic coordination across batteries, generators, and variable generation assets. HybridOS™ continuously evaluates asset availability and operating limits to determine optimal real-time dispatch under all conditions. Automated commissioning procedures Commissioning procedures built around the project’s equipment configuration help field teams test consistently. Market test kits Support control commands and post- test documentation to help demonstrate project readiness. Grid interaction and operator controls Controls supporting reliable plant operation and operator interaction. Support owner success beyond COD Reaching COD is only the first measure of project success. FlexGen helps EPCs hand over a well-documented system designed for reliable operation—supporting owner satisfaction and protecting the EPC’s reputation long after commissioning. Support through project delivery Ensure owner satisfaction with system design and controls engineering, battery, PCS, and balance-of-plant integration, HybridOS EMS/PPC configuration and integration, onsite commissioning support and much more. Support beyond COD FlexGen’s lifecycle services provide remote technical support, preventive maintenance, software upgrades, warranty coordination, spare-parts support, and augmentation services. Tested and documented project handoff FlexGen provides control narratives, integration test records, commissioning reports, and other project documentation so everyone has a clearer record of what was configured, tested, and delivered. Seamless partner portal access EPC teams login to the FlexGen partner portal to access technical documentation, product resources, customer-ready materials, and the EMS budgetary tool. Cybersecurity and compliance HybridOS uses a security-first architecture designed for critical infrastructure. HybridOS is a US-built architecture, is ISO 27001:2022 and ISO 27001:2013 certified, and has NIS 2 Directive assessment completed. 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. 25+ GWh completed and under contract. That’s enough storage capacity to provide electricity to more than 5 million average U.S. homes for 4 hours. 10+ Countries with active and contracted deployments. FlexGen supports a variety of energy projects across all 10 U.S. markets and internationally. 13 Million hours of runtime. HybridOS’ single codebase is built off and improves from the cumulative experiences of 200+ global projects and 80+ equipment configurations. Ready to deliver your next BESS project on schedule? FlexGen’s experts will walk through your project scope and integration requirements to show you exactly how One-Touch Commissioning™ will protect your timeline. Talk to an Expert Frequently Asked Questions What is FlexGen’s role in an EPC engagement? FlexGen partners with EPCs across system design, integration, supply, commissioning, and project handoff. The company can extend that accountability through long-term lifecycle management services for the end operator. What does One-Touch Commissioning™ mean for my schedule? One-Touch Commissioning™ runs integration testing in our Innovation Lab in parallel with shipping and construction, meaning field commissioning starts from a validated baseline rather than a cold start. FlexGen gets energy storage systems online in as little as 14 days, which significantly streamlines the path to first revenue. What does the integration validation process look like? FlexGen’s Innovation Lab validates every hardware configuration, control narrative, and Modbus integration against HybridOS™ before field deployment. Virtual and in-lab testing confirm that the system is ready for commissioning before it ships. What arrives on site is already tested and documented. How does FlexGen handle multi-asset sites? HybridOS™ is designed for complex, multi-asset sites. Sophisticated microgrid controls are validated in the lab before field deployment — so EPCs aren’t resolving orchestration issues during commissioning. FlexGen supports islanding, black start, grid resynchronization, and full multi-asset conflict elimination across any site configuration. What does the documentation package look like at handoff? FlexGen’s standardized commissioning process produces a complete, audit-ready documentation package at every phase. That can include integration test records, commissioning reports, and HybridOS™ control narrative documentation. One point of accountability means one complete, compliant handoff to the end client. Is FlexGen software-forward? Yes. HybridOS™ is the constant across every project. Because our software is validated across 80+ battery and PCS configurations, EPCs aren’t locked into a single OEM, and can adapt as regulated market and supply chain conditions shift without restarting the software integration process. What cybersecurity certifications does FlexGen hold? FlexGen holds ISO 27001:2022 and ISO 27001:2013 certifications and has completed a NIS 2 Directive assessment. HybridOS™ is US-built, with security-first architecture designed for critical infrastructure environments. For the full certificate stack, visit trust.flexgen.com. What markets does FlexGen operate in? FlexGen has completed projects across all 10 U.S. energy markets and internationally, with deep integration experience in ERCOT, PJM, CAISO, MISO, and SPP.
