What's New
New content, tools, and features added to learnBESS.
September 2026
Blog: What Is Relay Coordination in BESS? Relay coordination studies, protection zones from DC block to POI, and why inverter-limited fault current makes BESS fundamentally different. Blog: PPC vs EMS in BESS — What Is the Difference? What a Power Plant Controller and an Energy Management System each do, how they relate, and why the terminology is confusing. Blog: What Is Thermal Runaway in BESS? How thermal runaway starts, why it propagates, and what safety standards require to contain it. Specialist Guide: NFPA 855 Explosion Control for BESS Deflagration venting, explosion prevention, and what changes in the 2026 edition of NFPA 855.August 2026
Standards & grid codes reference section launched Searchable directory of BESS-relevant standards — IEC, IEEE, UL, NFPA, and national grid codes — with scope summaries and links to official sources. Blog: How Are BESS Batteries Recycled? From second-life screening to hydrometallurgical recovery — what actually happens to cells at end of life. Blog: How Does Battery Storage Make Money in EU Electricity Markets? The three revenue streams, the BRP and BSP roles, and how market participation actually works. Specialist Guide: EU Electricity Market Participation for BESS Specialist guide covering market roles, product qualification, and revenue mechanics for BESS in EU power markets. Specialist Guide: Directive (EU) 2019/944 — What It Means for BESS The EU electricity market directive — consumer rights, storage participation, and what member states must transpose. Specialist Guide: Regulation (EU) 2024/1747 — What It Means for BESS The latest EU regulation relevant to BESS — scope, requirements, and implications for project development. Specialist Guide: Regulation (EU) 2017/2195 — What It Means for BESS The EU balancing guideline — how balancing products are defined and what it means for BESS market access. Blog: What Is the EU Battery Regulation? What the regulation covers — safety, carbon footprint, digital tracking, due diligence, and end-of-life obligations. Specialist Guide: EU Battery Regulation for BESS Specialist guide on the full regulation — battery passport, carbon footprint declarations, EPR, and CE marking. Specialist Guide: Regulation (EU) 2019/943 — What It Means for BESS The EU electricity regulation — market design principles, non-discrimination for storage, and capacity mechanisms. Blog: What Is Fast Frequency Response (FFR) in BESS? Sub-second power injection to arrest falling grid frequency — what FFR specifies and how a BESS delivers it. Blog: AC Block vs DC Block in BESS What each topology is, how they differ, and what the choice means for flexibility, procurement, and cost.July 2026
Tool: OLTC Calculator Size the on-load tap changer range for a BESS transformer — input voltage, power, and impedance to get tap positions and regulation range. Blog: What Is the Capacity Market in BESS? How capacity markets work, what a BESS bids into them, and why they matter for project bankability. Blog: What Is a Power Conversion System (PCS) in BESS? The PCS explained — DC/AC conversion, grid-forming capability, and where it sits in the technology stack. Blog: What Is a Ring Main Unit (RMU) in BESS? What an RMU does, its key functions, and how it enables radial, daisy-chain, and ring MV collection topologies. Tool: BESS Flashcards Spaced-repetition flashcard decks covering key BESS concepts — technology, commercial, project delivery, and compliance. Tool: BESS Interview Questions Practice questions for BESS job interviews — grouped by role and topic, with model answers. Tool: BESS Readiness Assessment Self-assessment to gauge your BESS knowledge across modules — identifies gaps and suggests where to focus. Glossary launched Searchable glossary of BESS industry terms — from augmentation to state of health, each with a plain-language definition. Blog: NIS2 Compliance Responsibility in BESS The compliance obligation sits with the asset owner — but the OT integrator determines whether the plant meets it. Specialist Guide: NIS2 Cybersecurity Compliance for BESS Specialist guide covering NIS2 scope, obligations, supply chain requirements, and enforcement timeline. Tool: NIS2 Handover Readiness Checklist Interactive checklist to verify cybersecurity documentation is complete before BESS plant handover.June 2026
Blog: Ready to Build (RTB) in BESS What an RTB package actually consists of, why the term means different things to different developers. Blog: What Is Bankability in BESS? What lenders look for, how tier lists work, and what bankability means for equipment selection. Blog: Grid Forming vs Grid Following in BESS The two PCS control philosophies — what grid forming provides and why PCS capability does not equal plant capability. Blog: What Is Black Start in BESS? How black start works, what equipment capability it requires, and why it's more than just a PCS feature. Specialist Guide: Grid-Forming & Black Start for BESS Specialist guide covering inverter control philosophy, islanding, and black start applications for energy storage. Utility-Scale BESS Course launched All 8 modules now live — from BESS 101 through end of life. The complete structured onboarding course for the battery storage industry.May 2026
Blog: What Is Round Trip Efficiency (RTE) in BESS? What RTE measures, where the losses come from, and why quoted figures are not comparable without context. Tool: Round Trip Efficiency Calculator Calculate RTE from charge/discharge energy or estimate losses across the full BESS power path.April 2026
Blog: C&I vs Utility-Scale Battery Storage The key differences start at the grid connection — load or no load shapes everything from use cases to manufacturer fit. Blog: Hybrid vs Co-Located BESS What each configuration means, how they differ at the connection point, and why it matters for revenue. Course Module: How BESS Makes Money Revenue streams and market mechanics — arbitrage, ancillary services, and capacity payments. Blog: What Is a Site Acceptance Test (SAT)? What happens during a SAT, who runs it, and how it differs from commissioning. Course Module: BESS Project Lifecycle Development, construction, and commercial operation — the stages of a BESS project from site to grid. Blog: Behind the Meter vs Front of the Meter in BESS What BTM and FTM actually mean — and why the grid connection point defines everything else. Course Module: BESS Project Bankability Lenders, tier lists, guarantees, and insurance — what makes a BESS project financeable.March 2026
Blog: What Is Balance of Plant (BoP) in BESS? Everything outside the DC blocks and PCS — transformers, switchgear, cabling, civil works, and who supplies them. Course Module: BESS Fire Safety & Grid Compliance UL 9540A, NFPA 855, grid codes, and type testing — the safety and compliance framework for BESS. Blog: Warranty in BESS — DLP vs Product Warranty What warranty actually means on a BESS project — the DLP, product warranty, and why they're not the same thing. Course Module: BESS End of Life & Recycling Decommissioning, second-life assessment, and recycling processes for utility-scale battery systems. Blog: What Is a Factory Acceptance Test (FAT) in BESS? What gets tested, what documentation to expect, and what to look for when witnessing a FAT. Course Module: BESS Value Chain Who does what in energy storage projects — from cell manufacturers to asset managers. Course Module: BESS Technology Stack DC blocks, PCS, transformers, and power plant controllers — the equipment that makes up a BESS plant.February 2026
Course Module: BESS 101 — What Is a Battery Energy Storage System? The foundation module — what a BESS is, how it works, and where it fits in the power system.Become the BESS expert your team needs.
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