Start a demand-charge storage enquiry with the actual tariff, bills and time-stamped site load records. Have the evaluator agree the data interval and history needed for your billing rules and production pattern. Compare proposals using the same validated dataset, documented dispatch assumptions and complete installed scope.
Shown as a configuration reference. Availability and the equipment offered for your project are confirmed separately.
Collect the billing rules before requesting a battery size
Provide the full electricity tariff, supply agreement and available bills for the site being assessed. Ask the evaluator to identify exactly how billed demand is determined, the measurement interval, relevant time periods and any historical-demand or coincident-peak provisions that apply. Keep these rules with the financial model so the estimate can be checked against your actual billing conditions.
Do not select a storage system from a monthly energy total or an advertised payback period alone. Request a documented assessment using the applicable billing rules and site data. Where a tariff detail or future rate is uncertain, have the evaluator identify the uncertainty, the assumed treatment and the evidence needed to resolve it. Equipment pricing and potential bill savings are separate items requiring their own supporting information.
Agree the required load-data interval and history
Ask the evaluator to specify the time resolution and historical coverage needed for the actual billing method and site production pattern. Supply the finest reliable meter records available, with their original timestamps, units, interval definition and measurement location. Include the available billing history so the evaluator can reconcile the dataset with the bills. Data interval and history length are project-specific decisions.
Identify missing records, meter changes, clock changes and unusual shutdowns. Explain seasonal production, scheduled expansions and proposed equipment that the historical data does not represent. If solar generation, storage or other controlled equipment is already installed, provide the relevant measurements and operating records. Have the evaluator document how each data limitation affects confidence in the proposal.
Use a common data and quotation worksheet
| Buyer input | Evidence to request | Hold the comparison when |
|---|---|---|
| Tariff, supply agreement and bills | Documented billing-demand rules and reconciliation of the model to actual bills | Peak definition, relevant periods or applicable charges remain unclear |
| Time-stamped load records | Dataset quality report, measurement boundary and agreed time resolution | The available records cannot support the stated billing or dispatch analysis |
| Production pattern and planned changes | Recorded assumptions and alternative operating scenarios | The proposal treats an unrepresentative period as normal future operation |
| Proposed operating strategy | Documented control assumptions, charging opportunity and constraints | The model assumes unavailable data, controls or operating permissions |
| Quoted power and usable energy | Configuration-specific performance boundaries and stated site conditions | Catalogue capacity is substituted for the agreed delivered performance |
| Installed cost and ongoing obligations | Itemised project scope, service terms and model assumptions | Omitted equipment or operating costs prevent a comparable assessment |
| Acceptance and handover | Agreed tests, records and allocation of responsibilities | The contract does not identify how the promised scope will be verified |
Keep equipment performance boundaries consistent
Ask each supplier to state where power and usable energy are measured and the conditions attached to the quoted figures. Request the offered battery, power-conversion, control and auxiliary equipment configuration. Have the responsible engineer explain how site conditions, operating limits and the agreed duty are represented in the equipment proposal and assessment.
Use the same measurement boundaries in the quotation, model and acceptance plan. Require the evaluator to identify how charging energy, losses, auxiliary consumption, capacity changes and planned maintenance are accounted for. Ask for an auditable calculation with clear inclusions so an item is neither omitted nor counted twice. Have unresolved assumptions stated explicitly rather than hidden in a single return figure.
Request a site-specific assessment and complete installed scope
Have the evaluator compare the agreed operating scenarios under the actual tariff, including relevant billing provisions and proposed changes. Request the model inputs, calculation method and sensitivity to uncertain assumptions. Do not apply a simple peak-reduction multiplication across all tariff arrangements or treat a demonstration at another site as a savings guarantee for your facility.
Request an itemised scope covering equipment, interfaces, installation, commissioning, monitoring, training and the agreed service obligations. Confirm who assesses the site, electrical design, approvals and integration. UL 9540 covers a comprehensive review of energy storage systems, including charging and discharging, protection, control and communication between devices [S1]. That standard does not establish certification or approval of the equipment offered for your project.
Turn the data pack into an IndustryApex enquiry
Send IndustryApex engineers the tariff and bills, available load records, production plans, existing generation, site conditions and destination. Mark missing information so the assessment scope can address it before a configuration is confirmed. Include required operating modes and any OEM or ODM needs involving layout, controls, branding or integration.
Our engineers can review the equipment and integration requirements to prepare a project-specific proposal. Use thecommercial battery storage equipment guide for the complete equipment scope. Agree the design evidence, commissioning tests, performance records and handover responsibilities in writing; cost, delivery, warranty and any commercial commitments belong in the final project agreement.
Define your equipment requirements
Review the Commercial battery storage buying guide for the complete equipment scope.
Discuss this equipment project ↗ · OEM requirements · ODM requirements. Configuration and feasibility are reviewed for your application.
Explore the Commercial and industrial battery energy storage system buying guide and RFQ checklist ↗
Frequently asked questions
Which files should I send with a demand-charge storage enquiry?
Provide the full tariff and supply terms, available bills, original time-stamped load records and information about production schedules, planned changes and existing generation. Identify missing or unreliable records so the evaluator can define an appropriate assessment.
Must every project use the same meter interval and history length?
Have the evaluator agree the data resolution and history required for your actual billing rules and production pattern. Supply the finest reliable available records and billing history; disclose any limitations instead of assuming one fixed interval suits every site.
Why should load records be reconciled with electricity bills?
Ask the evaluator to confirm the measurement boundary, timestamps, units and billing treatment. A documented reconciliation helps identify gaps or assumptions that could prevent a fair comparison of the proposed scenarios.
How should quoted power and usable energy be compared?
Require each supplier to state the measurement points, offered configuration, site conditions and applicable operating limits. Keep those same boundaries in the project model and the agreed acceptance plan.
What should accompany a proposed savings or payback figure?
Request the actual tariff treatment, validated dataset, operating assumptions, complete cost scope and an auditable calculation. Have uncertainties and alternative scenarios identified; do not treat an estimate from another site as a guarantee.
Can IndustryApex support a customised storage package?
Send site, operating-mode, control, layout and integration requirements to IndustryApex engineers with the available data pack. OEM or ODM feasibility, engineering responsibilities, validation, pricing and support are confirmed in the project proposal.
Reference information
- Energy Storage System Testing and Certification | UL Solutions
Reference data and images explain equipment configurations. IndustryApex engineers confirm the offered model, specification and commercial scope in your project quotation.