Solutions / Engineering guide
20 kW vs 30 kW Wind Turbines: Staged Expansion Review
A staged project needs separate decisions for its first installation and a later change. Compare FD10-20KW and FD12-30KW with the current demand, a defined growth case and the evidence needed to review any proposed reuse of towers, foundations or electrical equipment.
Keep the first-stage design and future change distinct.
A plan to expand is not evidence that one model can be substituted for another. Record what is installed, what is proposed and which design responsibilities a later change would reopen.
01 / Known models
Use the confirmed specification differences.
FD10-20KW is rated 20 kW with a 10 m rotor.
FD10-20KW is rated 20 kW with a 10 m rotor. FD12-30KW is rated 30 kW with a 12 m rotor. The current models both use electric yaw, GFRP blades and high-temperature copper winding wire. A specific insulation or temperature grade is not confirmed here.
The table includes circular rotor-disc areas calculated from those diameters. Area is geometry only; it does not establish foundation size, wind-speed performance or output gain. Obtain the model-specific mechanical, control and electrical evidence needed by the proposed installation.
02 / Stage definitions
Give each demand case a clear status.
Describe the current loads and the changes expected in the later stage, including operating hours, simultaneous demand and any short events.
Describe the current loads and the changes expected in the later stage, including operating hours, simultaneous demand and any short events. Mark each change committed, conditional or still unquantified. Compare both model candidates against the same defined service rather than a vague intention to grow.
A hypothetical owner is evaluating another production process whose equipment has not yet been selected. Record that future demand as an open scenario. The comparison should show which equipment or schedule decision would justify further review of the 30 kW candidate; it should not assume the growth is already operating.
03 / Existing baseline
Identify what would actually be retained.
For a retrofit, collect the installed turbine and tower identities, foundation references, electrical-device list, completion records and known changes.
For a retrofit, collect the installed turbine and tower identities, foundation references, electrical-device list, completion records and known changes. Use the records of the actual installed assembly, not the standard drawing of a similar project.
NASA’s configuration-management guidance supports keeping a baseline and its records consistent. The project’s reuse review should name the existing revision and the proposed revision. A catalogue label such as 20 kW installation does not identify every interface within it.
04 / Mechanical changes
Reopen the tower, foundation and envelope questions.
Ask the responsible designers to compare applicable turbine loads, mounting references, tower requirements and the foundation design for each candidate.
Ask the responsible designers to compare applicable turbine loads, mounting references, tower requirements and the foundation design for each candidate. Keep reference points and revisions with the information. A larger rotor or different power class does not imply a known proportional change in structural loads.
Review the rotor and yaw movement envelope against the actual terrain, structures and access arrangements. Retain the designer’s confirmed disposition for every retained component. Neither an unchanged bolt pattern nor available lifting space proves that FD12-30KW is suitable for the existing support.
05 / Electrical changes
Separate confirmed reuse from requested continuity.
Review the controller, converter, cables, connection and site-acceptance requirements against the new configuration.
Review the controller, converter, cables, connection and site-acceptance requirements against the new configuration. List affected drawings and supplier responses. If the project requires continued service during a change, define that requirement and its proposed alternative supply separately.
Use the electrical selection guide to identify needed interface information. This page provides no removal, mounting, switching or energizing sequence. The qualified project teams must establish the work and verification plan for the actual approved scope.
06 / Staged comparison
Include the later work in the procurement record.
Compare a first-stage scope with a documented future-change scope, or a separately defined 30 kW initial-installation candidate.
Compare a first-stage scope with a documented future-change scope, or a separately defined 30 kW initial-installation candidate. Include the affected local works, documents, service interruption assumptions and responsibility changes. Do not present an unreviewed future upgrade as a fixed-cost option.
Send MARSTON both model candidates, the demand cases and any actual baseline records. Request equipment information and a response on the scope under discussion. Retain conditions and gaps in the RFQ record; no direct interchangeability or future delivery promise follows from the comparison.
Continue the review with 30 kW vs 50 kW Wind Turbines: Configuration Evidence Review.
Continue the review with Wind Turbine Controller Supply: Prepare a Separate Enquiry.
Continue the review with Wind Turbine Factory & Site Acceptance: Evidence Planning.
General background: NASA: Baseline Identity and Controlled Changes. These references explain industry concepts; they are separate from the applicable MARSTON product and project documents.
Compare the confirmed specifications.
Power, rotor diameter, yaw and blade material are confirmed. Circular disc areas are calculated from nominal diameter using A = π × D² / 4; they are not electrical output or ground footprint.
| Specification | FD10-20KW | FD12-30KW |
|---|---|---|
| Rated power | 20 kW | 30 kW |
| Rotor diameter | 10 m | 12 m |
| Geometric disc area | 78.5 m² | 113.1 m² |
| Yaw | Electric yaw | Electric yaw |
| Blade material | GFRP | GFRP |
Engineering questions.
Is FD12-30KW a confirmed direct upgrade for FD10-20KW?
No. Mechanical, structural, electrical and operating interfaces need review for the actual installation and proposed change.
Can identical-looking bolt patterns approve a retrofit?
The complete loads, interface and support design still require the responsible review. Appearance or one dimension is insufficient.
How should uncertain future demand be handled?
Keep a separate scenario with status, basis and missing information. It should not replace the current measured or documented load.
Does rotor area predict the output increase?
The calculated area describes geometry. Applicable performance evidence and site conditions are needed to compare energy.
Can the existing electrical equipment be assumed reusable?
Identify each device and its current documents, then obtain configuration-specific review of ratings, interfaces and functions.
What makes a staged enquiry useful?
Present and growth demand cases, an identified existing baseline where relevant, affected-interface questions and separate first-stage and later-work scopes.
Technical enquiry
Bring your project information to the discussion.
A staged project needs separate decisions for its first installation and a later change. Share the available information and the equipment scope you want reviewed in a technical quotation.