Este guia está disponível atualmente em inglês.
Solutions / Engineering guide
Third-Party Battery Planning for Wind Power Projects
A battery proposal needs separate energy, power and interface reviews. Define which service third-party storage would provide, where its usable energy is measured and how it would be charged before assigning an autonomy duration or comparing equipment.
Keep usable kWh, available kW and connection duties separate.
MARSTON does not claim an own-brand storage product. Battery chemistry, operating limits and compatibility must be established for the actual third-party equipment proposed.
01 / Required service
State what storage is meant to support.
Describe the required task: bridging a supply interruption, shifting generation to another time, supporting an essential load or another defined purpose.
Describe the required task: bridging a supply interruption, shifting generation to another time, supporting an essential load or another defined purpose. List the loads, required duration and available alternative supplies. Keep each task separate when its operating conditions differ.
Use the load profile to establish demand during the relevant period. A desired number of autonomous days is a service request, not a completed capacity calculation. Define the starting condition and which generation or backup remains available in that case.
02 / Energy boundary
Ask what the quoted usable capacity includes.
Nominal capacity and usable capacity can differ; SAM’s battery guidance explicitly distinguishes these terms.
Nominal capacity and usable capacity can differ; SAM’s battery guidance explicitly distinguishes these terms. Record the supplier’s operating window, reference conditions and whether energy is specified at the battery terminals or at the intended load connection.
List reserves, auxiliary demand and conversion effects with their boundaries. Do not deduct the same effect twice if a usable-energy claim already includes it. Obtain the conditions under which the supplier supports the value, rather than importing a generic depth-of-discharge or aging allowance from another battery.
03 / Power & duration
Check both the demand level and the time it must last.
Request continuous and any supported short-duration discharge capability, with their conditions, separately from energy capacity.
Request continuous and any supported short-duration discharge capability, with their conditions, separately from energy capacity. Charging capability also needs its own rating. A large kWh figure does not confirm the converter can support a brief peak or the required continuous load.
Hypothetical arithmetic: if 10 kWh is available at the same boundary as a constant 2 kW load, the ideal energy-to-power ratio is five hours. This excludes changing loads, reserves and other unstated effects. It illustrates units; it is not a runtime guarantee or a MARSTON battery specification.
04 / Recharge cases
Assess whether the energy can be restored.
Describe how the storage returns to its required starting condition after discharge.
Describe how the storage returns to its required starting condition after discharge. Compare permitted charging power, accepted generation and remaining site demand through a time sequence. State whether charging from another source is included and which party defines its operating rules.
A high annual wind-energy total does not establish timely recharge after a low-generation period. Review consecutive shortfall periods and recovery cases using the actual resource and load files. Record unresolved assumptions instead of treating every unused wind kWh as automatically accepted by the battery.
05 / Equipment interface
Confirm the complete path between wind and storage.
Identify the battery, its control system, storage converter and proposed wind controller or converter.
Identify the battery, its control system, storage converter and proposed wind controller or converter. Obtain the electrical ranges, supported commands, status information and responsibilities needed by the integrator. A matching nominal voltage or physical connector alone does not establish compatibility.
Use the interface guide for the proposed arrangement. Do not assume a direct battery connection, common DC bus or particular AC coupling. Functions such as grid forming, black start and remote dispatch require explicit evidence for the configured equipment.
06 / Procurement record
Retain the conditions behind the capacity proposal.
Prepare a service-case table, energy and power ratings, equipment identities, charging cases and interface matrix.
Prepare a service-case table, energy and power ratings, equipment identities, charging cases and interface matrix. Add the supplier’s operating conditions, support scope and applicable verification evidence. Keep quoted capacity, assumptions and requested functions in separate fields.
MARSTON can discuss the wind-equipment portion of a project within its confirmed 5–50 kW range. Third-party storage supply, installation and system integration need their own agreed responsibilities. Before procurement, compare delivered usable energy and supported service at the same boundary rather than battery labels alone.
Continue the review with Load Profiles for Small Wind Power: kW, kWh & Timing.
Continue the review with Wind Power & Backup Generators: Integration Planning.
Continue the review with Wind Generator Rectifiers: AC-to-DC Interface Review.
Further project guides: AC & DC Coupling for Wind Hybrid Systems · Wind Power Export Limits & Zero-Export Requirements · Wind Power Self-Consumption & Self-Sufficiency Metrics.
General background: NLR SAM: Nominal and Usable Battery Capacity · DOE: Storage Energy and Power Capacity. These references explain industry concepts; they are separate from the applicable MARSTON product and project documents.
Prepare the information for this review.
Use the checklist to organise the project information. Mark unavailable items and retain document references.
| Review item | Information to provide | Purpose |
|---|---|---|
| Storage service | Load group, duration, starting condition and alternatives | Define the requested task. |
| Usable energy | Boundary, operating window and supplier conditions | Interpret the capacity being quoted. |
| Power ratings | Charge, continuous discharge and supported brief events | Check the required demand levels. |
| Recovery cases | Resource timing, remaining demand and charging restrictions | Assess replenishment after discharge. |
| Interface scope | Device identities, ranges, commands and responsibilities | Review actual equipment compatibility. |
Engineering questions.
Does MARSTON supply its own batteries?
No own-brand storage product is claimed here. Identify the third-party supplier and scope if storage is proposed.
Are nominal kWh and usable kWh the same?
They can differ. Obtain the definitions, operating window, reference conditions and measurement boundary used by the supplier.
Can kWh alone determine whether storage supports a load?
No. The load also needs a supported power level, duration and interface. Review both energy and power capability.
Does the five-hour example establish autonomy?
No. It is an ideal ratio with hypothetical values at a common boundary; project runtime requires the actual conditions and equipment limits.
Can any battery connect to the wind package?
Compatibility and topology require review of the actual devices, electrical ranges, controls and integration responsibilities.
Why assess recovery after discharge?
A system must regain the starting energy required for its next service period. Resource timing and charging constraints determine whether that recovery is achievable.
Technical enquiry
Bring your project information to the discussion.
A battery proposal needs separate energy, power and interface reviews. Share the available information and the equipment scope you want reviewed in a technical quotation.