Knowledge
Understand how batteries, pumped hydro, air, flywheels, capacitors, thermal and hydrogen storage work. Compare service boundaries, site constraints and lifecycle evidence before choosing an architecture.
This centre covers electrochemical, mechanical, electrical, thermal and chemical storage. The three existing lessons, evidence checklist and procurement calculator specifically address stationary batteries. Microgrid dispatch and VPP participation remain linked to their existing topic paths.
Storage extends beyond batteries
Start with the principles and selection of batteries, pumped hydro, compressed/liquid air, flywheels, capacitors, heat and hydrogen. Training contains nine lessons; the three original lessons and procurement tool form a battery-specific path.
Read the full technical chapter and cases1. A storage system is a chain of capabilities
Cells store electrochemical energy, but a customer receives a service at a defined AC meter. Modules, racks, DC protection, the BMS, PCS, transformer, auxiliary supply and site controls sit between those boundaries. A cell rating or a converter nameplate alone does not establish whole-system delivery. The DOE procurement resources [S1–S2] help turn such boundaries into a specification.
Begin a project by drawing the energy path and the control/permission path separately. State where power, energy, efficiency and auxiliary consumption are measured. A system may contain enough stored energy yet fail a high-power request, or satisfy the first discharge but have no adequate recharge opportunity.
Storage energy and control boundaries
2. Specify a duty before discussing capacity
Define the required net AC MW, continuous duration, annual event count, initial SOC, protected SOC floor, ambient conditions and the study-year retained capacity. These describe different constraints. Initial nameplate DC MWh is not the same as end-of-study net AC MWh, and an annual average efficiency does not establish instantaneous overload capability.
When using a simple screen, calculate the SOC-window DC energy, apply the stated discharge-path efficiency, then deduct auxiliaries at the chosen boundary. Record which losses are already included so they are counted once. Recharge, thermal limits, reactive-power requirements and network permissions need separate checks rather than a larger energy number.
Study the related lesson and worked case →3. Lifecycle management begins in the contract
Performance assurance is conditional. Calendar time, cumulative energy throughput, cycles, temperature, SOC history and operating exclusions may define different limits. A retained-capacity promise must identify the test method, meter boundary, corrective action and responsible counterparty. A projected throughput limit is a contract-screening result, not a prediction of cell failure.
Keep acceptance records, configuration versions, maintenance logs, capacity tests and warranty exceptions in one traceable register. Safety also spans installation, operation, emergency planning and retirement; the DOE safety strategy and Sandia research [S3–S4] provide background, while the applicable authority and qualified specialists determine site-specific requirements.
Study the related lesson and worked case →Sources and review date
Reviewed 26 October 2026. Text, diagrams and exercises are original. All numerical cases use stated teaching assumptions, rather than site measurements or manufacturer commitments. These primary sources support the technical background; verify their applicability to each project.
[S1] DOE FEMP · BESS Procurement Checklist ↗
Early procurement questions and scope.
[S2] DOE FEMP · Lithium-ion BESS Technical Specifications ↗
Customisable procurement template, not a local approval.
[S3] DOE · Energy Storage Safety Strategic Plan ↗
Lifecycle safety research and deployment context.
[S4] Sandia · Energy Storage Safety and Reliability ↗
Testing, failure and degradation background.