Storage procurement and warranty duty checker

Define the service boundary, then check every constraint. Built-in values are resettable fictional teaching examples; results prepare further review.

Storage procurement & warranty screen

Compare one common net AC duty, end-of-study capacity, declared warranty limits and input-cost scope. First reconcile the supplier evidence; lower cost cannot override a failed gate.

Inputs and calculation stay in this browser. Drafts are stored locally only when you save. Reports contain your inputs; review them before sharing. The enquiry transfers a short summary only and still requires a separate submission.

Project reference (optional)

1. Define the common service

Required net AC service (MW)Continuous service duration (h)Events per year on this dutyZero means no annual cycling assumed, not unlimited warranty.Common study horizon (years)Discount rate consistent with the costs (%)Common quotation currency

2. Enter comparable quotations or pathways

Quote example A

Quote nameInitial nameplate DC energy (MWh)Validated PCS active-power capacity in this state (MW)After relevant Q duty, ambient and other derating; auxiliaries are deducted below.Capacity retention at the common study endpoint (%)A declared scenario or tested/guaranteed condition, not a fitted degradation prediction.Starting SOC (%)Protected SOC floor (%)DC-to-AC discharge-path efficiency (%)Use the stated service-meter path; exclude the separate auxiliaries entered below.Constant AC auxiliaries supplied through this PCS (MW)Declared calendar warranty limit (years)Cumulative guaranteed net AC output cap (MWh)Use only if the contract uses this exact boundary; other conventions need separate translation.Comparable installed upfront costConstant annual costs within the declared scopeInput-cost PV only. No automatic energy bill, replacement, tax, financing or residual is added.Quotation/test/contract references, dates and unresolved scopeI have reconciled performance, warranty counting/conditions and cost scope on this common boundary.

Study the calculation background Data request and evidence check

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.