Course 02 of 20 · Battery and Flexibility Desk Academy

Commercial Specifications & Operating Limits

Stage A, Asset and constraint foundations. Level 1 of 10.

Reading an asset specification commercially: power rating, energy capacity, duration, round-trip efficiency, state-of-charge window and ramp capability as limits on what can be sold.

120 chapters · 11 modules · every chapter one 8 to 10 minute explainer · builds on: Course 01

Enrol or enquire See the 120 chapters
How a chapter is delivered

One chapter is one idea taken to the point of use

Each chapter covers one idea to the point where you can use it, and comes two ways: a narrated explainer, and a deep dive audio discussion of around thirty minutes that works the same material at depth.

Self-paced throughout, and the same chapters can be taught as a cohort. Chapters run in order: each one assumes only what the chapters before it taught, and capability belonging to a later course is named and deferred rather than half-covered.

Curriculum

11 modules · 120 chapters

Open any module for its full chapter list, in teaching order.

M0 The Specification as a Commercial Document Ch 1-10
  1. Why the Datasheet Decides What a Flexibility Desk Can Sell
  2. The Figures That Fix the Saleable Envelope
  3. A Limit, a Target and a Guarantee Are Three Different Promises
  4. The Engineer's Figure and the Trader's Figure Side by Side
  5. Nameplate, Installed and Offerable: Three Capacity Words
  6. The Working Vocabulary of a Storage Specification
  7. Why a Typical Value Is a Commercial Liability
  8. Whose Seat Reads the Specification, and Why It Matters
  9. Reading an Enquiry Against the Asset Before Replying
  10. What the Operating Envelope Settles and What It Hands On
M1 Power Rating as the Instant Limit Ch 11-21
  1. Power Rating as a Rate the Asset Cannot Exceed
  2. Charge Rating and Discharge Rating Need Not Match
  3. Continuous Rating Against Short-Duration Overload
  4. Where the Power Rating Is Measured: Cells, Inverter or Meter
  5. The Power Conversion System as the Real Ceiling
  6. Apparent Power, Real Power and the Reactive Demand on the Same Kit
  7. Power Rating Stated at a Reference Temperature
  8. Why Output Falls at the Ends of the Charge Range
  9. Adding Up Power Across Units, Racks and Blocks
  10. Sign Conventions for Import and Export on One Asset
  11. A Power Rating Read Off One Illustrative Datasheet
M2 Energy Capacity as the Window Limit Ch 22-32
  1. Energy Capacity as the Stock Behind Every Delivery
  2. Rated, Nominal and Beginning-of-Life Energy Figures
  3. Usable Energy Against Installed Energy
  4. Energy Measured at the Terminals and at the Meter
  5. How a Capacity Test Is Specified and Run
  6. Why the Measured Figure Depends on the Discharge Rate
  7. Energy at Full Charge Against Energy Available Right Now
  8. Adding Energy Across Strings, Containers and Phases
  9. Energy Capacity in Kilowatt Hours, Megawatt Hours and Ampere Hours
  10. Why Two Vendors' Capacity Figures Are Not Comparable
  11. An Energy Capacity Statement the Desk Can Defend
M3 Duration as Energy Divided by Power Ch 33-42
  1. Duration as Energy Capacity Divided by Power Rating
  2. Why a Duration Label Describes a Configuration, Not a Capability
  3. Running at Part Load to Buy More Hours
  4. Duration at Full Rate Against Duration in Service
  5. The Charging Duration Nobody Quotes
  6. A Delivery Window Longer Than the Asset's Duration
  7. Back-to-Back Deliveries and the Energy That Is Not There
  8. Duration Under a Partial Starting Charge
  9. Matching Asset Duration to Product Duration Requirements
  10. A Duration Table Built From One Asset's Own Figures
M4 Round-Trip Efficiency and the Energy That Does Not Return Ch 43-54
  1. Round-Trip Efficiency as Energy Out Over Energy In
  2. Charging More Than You Intend to Sell
  3. Where the Losses Actually Occur
  4. One-Way Efficiency and the Two Halves of the Trip
  5. Direct-Current Efficiency Against Alternating-Current Efficiency
  6. Auxiliary Load: Cooling, Controls and the Energy Nobody Sold
  7. Standby Losses and the Cost of Simply Holding Charge
  8. Why Efficiency Changes With Rate and Charge Level
  9. Efficiency Degrades, and That Belongs to the Warranty
  10. Reading an Efficiency Figure's Test Conditions
  11. The Loss Allocation Question a Contract Must Answer
  12. An Efficiency Statement Built for the Term Sheet
M5 The State-of-Charge Window Ch 55-65
  1. State of Charge as the Asset's Fuel Gauge
  2. Why the Operating Window Is Narrower Than the Full Range
  3. A Narrower Window Cuts Usable Capacity Proportionally
  4. Who Sets the Window, and Can It Be Changed
  5. Reserved Space at the Top, Reserved Energy at the Bottom
  6. A Charge Level That Is Itself a Commitment
  7. Stored Energy for Upward Service, Empty Space for Downward
  8. The Charge Level a Service Obligation Implies
  9. How the Gauge Reading Is Produced and Why It Drifts
  10. Window Width Against Cycle Life: Naming the Trade
  11. A Window Stated Three Ways and Reconciled
M6 Ramp Capability and Response Speed Ch 66-76
  1. Ramp Capability as a Rate of Change of Output
  2. Response Time, Ramp Rate and Full Delivery Point
  3. Why Storage Ramp Is Fast but Not Instantaneous
  4. Ramping Up Against Ramping Down, and Through Zero
  5. Converting a Ramp Rate Into Energy Inside a Window
  6. Sustaining a Ramp Against Reaching a Rate Once
  7. Ramp Limited by the Charge Level, Not the Converter
  8. Measurement Resolution and the Ramp You Cannot Prove
  9. Ramp Capability of a Site Against a Single Unit
  10. Reading a Ramp Figure From a Commissioning Test Record
  11. Speed, Size and Duration as Three Competing Asks
M7 Boundaries, Conditions and Site Reality Ch 77-87
  1. Every Figure Belongs to a Measurement Boundary
  2. Moving a Figure From One Boundary to Another
  3. Ambient Conditions as a Condition on Every Entry
  4. Thermal Management as a Limit, Not a Detail
  5. Altitude, Humidity and the Site Derating Schedule
  6. Safety Documents That Constrain Commercial Operation
  7. Availability as a Specification Entry in Its Own Right
  8. Scheduled Maintenance Windows as Lost Saleable Time
  9. Control System Settings That Silently Cap Output
  10. The Grid-Side Envelope Named and Deferred
  11. A Specification Deliberately Simplified, and What Breaks It
M8 Reading the Paperwork That Establishes a Limit Ch 88-99
  1. What Documents Actually Establish an Asset's Limits
  2. Marketing Literature Against Contractual Schedules
  3. Reading a Commissioning Test Report Commercially
  4. Finding the Current Revision of a Named Standard
  5. The Questions to Send a Vendor Before Quoting
  6. Spotting the Figure That Cannot Be True
  7. A Datasheet With Three Entries Missing
  8. Version Control on an Asset's Own Numbers
  9. Restating a Figure When the Asset Is Reconfigured
  10. Who Owns the Envelope Inside the Business
  11. Translating an Engineering Limit Into Commercial Language
  12. Two Assets, One Portfolio, Two Different Envelopes
M9 Writing the Envelope the Desk Sells Against Ch 100-110
  1. The Operating Envelope as One Document
  2. Stating a Limit With Its Conditions Attached
  3. Which Limit Binds First, and Why It Changes
  4. A Feasibility Test for an Incoming Request
  5. Turning a Refusal Into a Counter-Offer
  6. The Headroom a Desk Keeps for Itself
  7. Limits Written Into a Term Sheet
  8. Reporting the Envelope to a Board or a Lender
  9. Updating the Envelope After an Operating Season
  10. Two Teams, One Asset, Two Envelope Versions
  11. An Envelope Written Out in Full for One Asset
M10 The Envelope Applied, and What It Cannot Settle Ch 111-120
  1. A Worked Situation: An Enquiry Arrives, Part One
  2. A Worked Situation: Testing the Request, Part Two
  3. A Worked Situation: The Reply That Gets Signed, Part Three
  4. Envelope Errors That Reached a Counterparty
  5. What Reading a Specification Cannot Settle
  6. The Figures That Will Move, and Why
  7. Where a Specification Reading Becomes a Judgement
  8. The Habits Later Courses Will Assume You Have
  9. Handing the Envelope to the Dispatch Decision
  10. One Asset, One Page the Desk Trades Against

The brochure gives each of these 120 chapters a paragraph on what it covers and what you can do once you have worked through it.

This is course 2 of twenty

It stands alone, and it is also the entry point to the Battery and Flexibility Desk Academy pathway.

Enrol or enquire See the whole pathway