Equipment transport for wind farms: towers, nacelles, blades and the repowering wave of the 32 to 62 GW transition

Spain has 32,910.79 MW of installed wind power as of March 2026, according to data from the Asociación Empresarial Eólica, distributed across 1,454 wind farms with 22,000 wind turbines and 66,000 blades in operation. Wind ranks first in the Spanish energy system, meets 24% of demand and puts Spain second in Europe by installed capacity, behind Germany. The PNIEC target for 2030 is 62 GW — 30 GW more in four years, against a 2025 installation pace of 1,420.88 MW net across 44 new farms and 7 repowered ones. Closing the gap at the current pace is mathematically difficult, and the sector knows it.

The other stream, parallel to new installation, is repowering. Spain has the oldest wind fleet in Europe, with 2.8 GW past 25 years of useful life and 10 GW past 20 years. The Asociación Empresarial Eólica estimates that 20.5 GW, two-thirds of the current fleet, will exceed two decades by 2030. The Government has mobilised a specific programme: Repotenciación Circular, managed by IDAE with NextGenerationEU funds. Its second call, open in December 2025, is allocated €292 million. The logistical consequence is direct: the next four years carry two simultaneous flows to the same destination, new installation and replacement installation, each with its own shipment calendar.

For the special-transport operator, this is the complete picture. Unlike the photovoltaic flow, where most cargo travels in conventional trucks, in wind almost all critical cargo activates the special-transport regime. What matters isn't how much of the cargo is special; it's which specific equipment each component needs: tower sections and hubs that move with the conventional fleet, heavier blades and nacelles of the new 6+ MW format that require specific equipment, which the special-transport operator coordinates as part of the project's logistics package.

The Spanish wind map 2026–2030: a fleet ageing faster than it grows

New installation in 2025 concentrated in the peninsular interior and north-west. Aragón led with 611.4 MW added, followed by Castilla y León (566.38 MW), Galicia (70.6 MW), Navarre (66 MW), La Rioja (63.8 MW), Andalusia (37.2 MW) and the Canary Islands (5.5 MW). Aragón and Castilla y León alone account for 83% of the year's new wind capacity. The 287 industrial centres of the Spanish wind value chain (manufacturing, assembly, logistics, operation and maintenance) employ more than 37,000 people and are distributed across sixteen of the seventeen autonomous communities.

On top of new installation comes repowering, still a minority but accelerating. The Asociación Empresarial Eólica reports that only 11 repowering projects have been executed so far: barely 3% of the fleet over 20 years old. Pipeline projects represent substantially more volume: the Aldeavieja farm in Santa María del Cubillo (Ávila), already operational in the new format; Tahivilla in Cádiz (98 wind turbines → 13, from 78.4 to 84.4 MW); Naturgy in Galicia with three farms (Novo, Monte Redondo and Somozas), totalling 172 old wind turbines replaced by 25 new ones; EDPR in A Coruña with Zas + Corme (141 turbines → 17, maintaining 42.3 MW); Iberdrola in Albacete with Molar del Molinar (75 → 11) and Isabela (64 → 11); Statkraft in Navarre with Montes del Cierzo I and II (84 turbines, first phase). The pattern repeats: three, five, seven old wind turbines replaced by one new one, with capacity maintained or increased and output doubled per unit of capacity.

The IDAE's Repotenciación Circular programme is the financial engine: the first call awarded €185.7 million in 2023 to 169 projects, of which line 1 (wind repowering) received €147.8 million to replace 1,205 old wind turbines with 167 latest-generation ones, an 86% reduction in number of machines, with 8% capacity increase and double the generated energy. The second call, formalised by IDAE Board of Directors resolution on 23 December 2025 (BOE no. 312 of 27 December), is allocated an additional €292 million, extends mini-hydro eligibility up to 50 MW and keeps the wind line as a priority.

For the special-transport operator, what this map means is this: the bulk of wind logistics activity over the next four years will concentrate in interior and north-west regions, on rural road networks not designed for 90-metre blades or 150-tonne nacelles. And it splits into two simultaneous flows, new installation plus repowering, that share destinations but require distinct calendars.

What is transported from a wind turbine

A modern 5-6 MW class wind turbine, with hub height around 150 metres, breaks down into between 5 and 8 distinct logistics movements. Each component has its own dimensional profile, its own weight, its own transport-equipment requirement. The typical chain:

• 3 × blade: length 70–90 metres, weight 25–40 tonnes per unit, in a single piece (modular blades exist but are a minority in the commercial fleet). The most visible component from the road, and the one that activates the most demanding equipment profiles.
• 3–5 × tower section: length 25–30 metres per section, base diameter Ø 4–5 metres, weight 50–100 tonnes per section. The complete tower is assembled on-site from three to five segments.
• 1 × nacelle: weight 80–150 tonnes for current-range machines; 6 MW and larger models can exceed 200 tonnes in their heaviest configurations.
• 1 × hub: weight 30–50 tonnes, the structural piece that connects the nacelle to the blades.
• 1–3 × drivetrain, generator, gearbox: sometimes pre-installed inside the nacelle, sometimes shipped separately for on-site integration; weight 15–40 tonnes each.
• 1 × evacuation substation: grid-evacuation transformer plus auxiliary substation equipment. The same logistics profile as the evacuation transformer of a photovoltaic plant or of a green hydrogen substation.

For a typical 100 MW wind farm with 20 × 5 MW wind turbines, trip counts sit around:

• ~60 blade trips
• ~80–100 tower section trips
• ~20 nacelle trips
• ~20 hub trips
• ~20–60 drivetrain / generator trips
• Several evacuation substation transformer trips

On top of that comes the civil-works and foundation-rebar flow, which doesn't activate the special-transport regime and travels in conventional trucks. The operational total of the critical flow for a 100 MW farm exceeds 200 special-transport trips distributed across an installation window of six to twelve months.

In wind, everything is special transport. The difference is which equipment is needed for each piece.

Why each component activates special transport

Component by component, the reasons for activating the regime:

1. Blade: length 70 to 90 metres exceeds the conventional semitrailer length (13.6 m) by five to seven times. Activates ACC in exceptional category by length, under Anexo IX del RGV, Anexo III del RGC and Instrucción 16/TV-90 de la DGT. Requires an extendable platform beyond 60 metres with authorised rear overhang, and on routes with restricted geometry (narrow roundabouts, urban-core streets, tight corners on mountain approaches) requires a specific adapter (blade adapter or blade lifter) that tilts the blade vertically to clear the critical points. Mandatory pilot vehicle, frequently double (front and rear). Feasibility study endorsed by a chartered engineer.
2. Tower section: base diameter Ø 4 to 5 metres translates into loaded width close to 5 metres, which activates ACC in exceptional category by width; length 25–30 metres additionally activates ACC by length; weight 50–100 tonnes per section places it in the indivisible-cargo range under Art. 14.2 del RGV (no large tower section is transported disassembled by design).
3. Nacelle: weight 80–150 tonnes for the current format places the piece in exceptional category by mass; new 6+ MW format models exceeding 150 tonnes require hydraulic modular equipment with several axle lines. Length 12–15 metres, typical width 4–5 metres.
4. Hub: weight 30–50 tonnes; dimensional profile fits the conventional special-transport fleet; standard ACC category.
5. Drivetrain / generator / gearbox: weights 15–40 tonnes; standard special-transport category when shipped separately; sometimes consolidated within the nacelle shipment.
6. Evacuation substation: profile identical to the evacuation transformer of a photovoltaic plant, a green hydrogen substation or a rail traction transformer. Exceptional category by mass when the transformer exceeds 40 tonnes.

The wind transport equipment chain

Wind transport is the most equipment-intensive subsector in all of special logistics. Each component has its own equipment profile, and the supplier set is broad. Category by category:

For blades (70–90 m, single piece, 25–40 t): an extendable platform beyond 60 metres, equipment few operators carry in their own fleet. When the route requires negotiating restricted turns, the blade adapter or blade lifter is incorporated: a mechanism that rotates the blade vertically to clear narrow roundabouts, urban-core streets and tight corners on mountain approaches. The most recent generations also include the self-loading blade trailer, a technology that eliminates separate crane operation at the factory. Usual equipment manufacturers: Goldhofer, Scheuerle, Faymonville, Nooteboom.

For heavy nacelles (>150 t) of the new 6+ MW format, the reference equipment is the SPMT (Self-Propelled Modular Transporter) or the hydraulic modular with 12 to 16 axle lines, configured according to the exact model weight. Usual manufacturers: Goldhofer, Cometto, Faymonville, Nooteboom.

For tower sections (25–30 m, 50–100 t, Ø 4–5 m), the conventional special fleet covers most movements: conventional low bed for middle and upper sections, extendable platform for the longest sections, hydraulic modular for the heaviest base sections.

For hubs, drivetrains, generators and gearboxes (≤ 50 t), the conventional low bed covers the full range.

For final on-site lifting, the operation uses crawler cranes (Liebherr LR, Manitowoc, Sany, XCMG among equipment suppliers) coordinated by heavy-crane specialists. It is a separate operation from transport, executed by specialised lifting operators, and synchronised with delivery so the nacelle arrives on the day the crane is available for the lift.

PASTOR's own fleet is built around the conventional low bed and the extendable platform: the equipment that handles tower sections, hubs, drivetrains, generators, gearboxes and evacuation substation transformers. These components represent the bulk of special-transport trips for a typical wind farm. For components requiring specific equipment outside the conventional fleet range (extendable platform beyond 60 metres and specific blade adapter for restricted turns on the final approach, and large-format hydraulic modular for the heaviest nacelles of the new 6+ MW format), PASTOR coordinates the operation end-to-end as part of the project's complete logistics flow. The specific equipment needed for these movements is integrated into planning from the initial phase, alongside the conventional flow, under a single commercial and documentary point of contact for the shipper.

Repowering: the reverse flow of wind

Spain has the oldest wind fleet in Europe. The fleet's average age is around 15 years. 2.8 GW exceeds 25 years of useful life; 10 GW exceeds 20 years. The Asociación Empresarial Eólica forecasts that 20.5 GW, 62% of the current fleet, will have exceeded 20 years by 2030. Repowering stops being an option and becomes the only route to preserve installed capacity without applying for new grid access.

The IDAE's Repotenciación Circular programme defines the procedure: the 2023 first call awarded €147.8 million to 34 projects that will replace 1,205 old wind turbines with 167 latest-generation ones. The average reduction in number of machines is 86%, the capacity increase 8%, and output per unit of capacity doubles, the result of the technological leap from 600 kW units to 5 MW units. The second call, open in December 2025 and allocated €292 million, expands the eligible portfolio.

The flagship example of the new format is the Aldeavieja farm in Santa María del Cubillo (Ávila), operated by Endesa through its subsidiary Enel Green Power España. The operation, already completed and registered in the AEE's March 2026 sectoral database, replaced 22 × 660 kW wind turbines (total 14.52 MW) with 4 × 6 MW wind turbines (total 24 MW). The net balance: +9.48 MW of capacity, +65% over the previous base, with 18 fewer wind turbines at the same site. The project's forward logistics flow: 4 nacelles, 4 hubs, 12 blades, between 16 and 20 tower sections. The reverse logistics flow, executed in parallel: 22 old nacelles, 22 old hubs, 66 old blades (of shorter length, typically 22 to 30 metres), 66 or more old tower sections. The reverse-flow trip count is about three times that of the forward flow at the same site.

The operational consequence is important. Repowering is not a single-flow logistics contract: it is a pair of simultaneous flows with opposite destinations, executed in the same construction window, at the same physical site. The new goes inward; the old, outward. The well-prepared special-transport operator contracts the complete package, forward plus reverse, from the initial phase.

The destination of the reverse flow has changed over the last three years. The first call of the Repotenciación Circular programme included a specific line (line 3, €14 million) that awarded six projects to build Spain's first wind-blade treatment facilities. Alongside them, major developers have activated additional plants through other PRTR instruments and European mechanisms. Three plants in the network are operational or starting up. Lumbier (Navarre): Acciona's Waste2Fiber® plant with RenerCycle, financed by Repotenciación Circular line 3, with proprietary thermal-treatment technology and 6,000 tonnes/year capacity, starting up at the end of 2025. Cortes (Navarre): Iberdrola and FCC Ámbito's EnergyLOOP plant, inaugurated in June 2025 with capacity up to 10,000 tonnes/year, already processing blades from Iberdrola group's own farms in Albacete (Molar del Molinar and Isabela). Compostilla (Cubillos del Sil, León): Endesa and PreZero's plant, with 2,000 blade units/year, equivalent to 6,000 tonnes of composite material.

Vertical integration between developer and treatment plant is emerging as the new market structure. Iberdrola contracts forward and reverse under the same package because both ends of the cycle belong to the group: Albacete delivers the dismantled blades to the EnergyLOOP plant in Cortes, within the group's own industrial chain. For the special-transport operator, this changes the tender structure: it's no longer a fragmented logistics contract between developer, EPC and separate waste manager, but an integrated package the shipper tenders en bloc. The consequence: the operator that arrives with a single point of contact for forward plus reverse under the same planning is the one that fits the new industrial logic; the operator that arrives with two separate contracts does not.

The blades that arrived at landfill five years ago no longer arrive: the repowering reverse flow ends at an authorised treatment plant, not at landfill. Metal components (towers, nacelle housings) enter the standard steel recycling chain; transformer dielectric fluids are managed as waste electrical and electronic equipment (RAEE) or as dangerous goods depending on the classification.

Equipment, escort and authority: the flow runs in the interior

The geography of the wind flow differs from that of the other renewable-transition subsectors. The plants concentrate in the peninsular interior and north-west (Aragón, Castilla y León, Galicia, Navarre, interior Andalusia), not on the Mediterranean Corridor. The main arteries are the Ebro Corridor westward for flows to Aragón and Castilla y León, the A-2 axis for central inter-regional flows, the A-66 axis for Galicia, and the regional transverse axes for the final stretch.

The industrial footprint of the sector's major OEMs is distributed across the north and centre: Siemens Gamesa operates the global onshore engineering centre in Zamudio (Bizkaia), the nacelle plant in Ágreda (Soria) and the repair and blade-roots centre in Cuenca; Vestas holds the tower factory in Daimiel (Ciudad Real); Nordex operates Lumbier and Barásoain in Navarre. A significant share of the fleet thus moves factory → wind farm overland, without port entry. The imported flow (turbines, blades or nacelles from foreign factories) enters through Bilbao for north and north-west projects, and through the Mediterranean ports (Barcelona, Valencia, Tarragona) for projects in Aragón, Catalonia and the eastern peninsular interior.

PASTOR's operation in the wind flow centres on the Mediterranean-Ebro axis. Specific accreditation from the Centro de Servicios al Transporte at the Port of Barcelona covers imported components from the moment they enter port. The Ebro Corridor is the outbound artery to the Aragón hubs and, from there, westward to Castilla y León. For wind projects whose flows do not touch this axis (sites in Galicia or in western interior Andalusia, without passing through Catalonia or Aragón), special-transport operators with closer geographic anchoring are the shipper's natural choice, and PASTOR says so to the client from the initial conversation.

Transport equipment selection by component:

• Tower section 50–100 t → conventional low bed or extendable platform
• Nacelle 80–150 t → hydraulic modular (the heaviest nacelles of the new 6+ MW format require large-format hydraulic modular outside the conventional fleet range, coordinated by PASTOR)
• Hub 30–50 t → conventional low bed
• Drivetrain / generator / gearbox 15–40 t → conventional low bed
• Blade 70–90 m → extendable platform beyond 60 metres + specific blade adapter when the route requires it (outside the conventional fleet range, coordinated by PASTOR)
• Evacuation substation transformer → hydraulic modular

The administrative regime splits by jurisdiction. Itineraries entirely within Catalonia are processed before the Servei Català de Trànsit (SCT). Inter-regional itineraries to Aragón and Castilla y León are processed before the DGT, with jurisdictional handover at the Catalan border, and complete the procedure before the regional administrations of Aragón and Castilla y León on their respective networks. ADR documentation where applicable, a minority case in wind transport, is governed by RD 97/2014 and ADR 2025, and applies uniformly across Spain, independently of the ACC jurisdiction.

The wind convoy's escort is more intensive than in any other renewable-transition subsector, because of the combination of component length and weight. Blades require a mandatory pilot vehicle, frequently double (front and rear); on self-escort stretches the convoy's own driver performs pilot functions under the specific regulation. Nacelles and tower sections exceeding 3 metres in loaded width require a private pilot vehicle. On the state network, combinations exceeding 5 metres in loaded width (rare in standard wind flow, possible in particular substation transformers) require accompaniment by the Agrupación de Tráfico de la Guardia Civil. On the Catalan network, accompaniment by the Mossos d'Esquadra activates when the combination simultaneously exceeds 40 metres in length and 5 metres in loaded width under SCT regulation. Escort handover coordination between autonomous communities, when the convoy crosses two or more jurisdictions in the same day, is part of the project file.

Common mistakes when planning wind transport

These failure patterns recur often enough in the sector to be worth listing:

1. Treating the wind flow as a single contract. Each wind turbine breaks down into 8–12 independent movements, with distinct equipment, escort and jurisdiction profiles. The well-prepared shipper issues coordinated transport packages that cover the fraction executed by the operator's own fleet and the fraction coordinated with specific equipment, under a single coordination interface.
2. Underestimating the subsector's equipment ecosystem. Wind transport is the most equipment-intensive in all of special logistics. The blade requires equipment that most general operators do not include in their own fleet. Pre-identification of specific equipment 6 months or more ahead of the shipment window is the minimum discipline; not flagging equipment escalation before booking confirmation is the common failure.
3. Not anticipating the nacelle weight-category jump. 6+ MW format nacelles can exceed 150 tonnes and fall outside the range of fleets sized for the previous decade's models. The well-prepared special-transport operator anticipates this jump from the project's commercial structure (which turbine model the developer has selected) and doesn't discover it on confirmation day.
4. Not synchronising forward and reverse repowering flows. The same error that affects the photovoltaic flow, amplified in wind: in typical repowering the reverse flow exceeds the forward by three-to-one in number of trips. Treating repowering as an exclusively forward-flow contract leaves half the logistics work open and leads to additional remobilisation costs.
5. Not anticipating specific blade recycling. Wind blades are composites of fibreglass, carbon fibre and resins, and since 2024 are not accepted at landfill. The destination of the reverse flow is the authorised treatment plant: Lumbier (Acciona-RenerCycle), Cortes (Iberdrola-FCC, EnergyLOOP), Compostilla (Endesa-PreZero) and the rest of the Spanish network starting up. Coordination with the destination plant belongs in the project plan, not improvised at pickup from the dismantled farm. In vertically integrated projects (Iberdrola contracting forward plus reverse within its own group), the logistics file captures both flows en bloc.
6. Not flagging equipment escalation when the project's commercial scope changes. When the developer selects a larger turbine model mid-tender, equipment requirements escalate: the tower section moves to the heavy range, the nacelle enters the ≥150 t category, the blade crosses 80 metres. The well-prepared special-transport operator flags this escalation from the project's commercial structure before it appears in booking confirmation.
7. Customs documentation gaps in imported components. OEMs with national manufacturing (Siemens Gamesa in Ágreda and Cuenca, Vestas in Daimiel, Nordex in Lumbier and Barásoain) ship by road within Spain without customs procedure. Turbines and blades from Asian or American factories require customs clearance via Algeciras, Bilbao, Barcelona or Valencia. The experienced operator carries pre-loaded digital documentation; the rest wait at customs.
8. Not anticipating the blade recycling flow in the contract. EU 2025-2026 circular economy regulation prohibits landfill for wind blades and requires an authorised treatment plant as the destination. The new end-of-life flow did not exist five years ago and today is a contractual standard. Developers and EPCs that do not include it in the commercial scope of repowering discover it on-site, with a management surcharge attached.

How we approach this at PASTOR

Sixty years of family tradition in special transport from Catalonia, with operational presence on the Mediterranean Corridor (Port of Barcelona as the entry point for imported equipment), and the Ebro Corridor as the main artery to Aragón and, from there, westward to Castilla y León. Specific accreditation from the Centro de Servicios al Transporte at the Port of Barcelona covers components imported from major OEMs from the moment they enter port.

Spanish wind-sector manufacturing sits mainly across the north and centre of the peninsula: Siemens Gamesa operates Ágreda (Soria) and Cuenca, Vestas operates Daimiel (Ciudad Real), Nordex operates Lumbier and Barásoain (Navarre). All of these points connect with PASTOR's Catalonia base via the Mediterranean-Ebro axis. For wind farms whose flows do not touch this axis (sites in Galicia or in western interior Andalusia, without passing through Catalonia or Aragón), special-transport operators with closer geographic anchoring are the shipper's natural choice, and we say so to the developer from the initial conversation. This geographic calibration is the mark of a mature operator, not of a diminished one.

PASTOR's operation in the wind flow concentrates on components whose logistics fit our own fleet: tower sections (conventional low bed or extendable platform), hub, drivetrain, generator, gearbox and evacuation substation transformer. These components represent the bulk of a typical wind farm's trips. For components requiring specific equipment outside the conventional fleet range (extendable platform beyond 60 metres for long blades, specific blade adapters for restricted turns, and large-format hydraulic modular for the heaviest nacelles of the new 6+ MW format), PASTOR coordinates the operation end-to-end. The specific equipment is integrated into project planning from the initial phase, alongside the conventional flow, under a single commercial and documentary point of contact for the shipper.

The ADR regime in wind transport is marginal: it applies only when gearbox oils, hydraulic fluids or transformer dielectric oil are moved separately in bulk (typically UN1202 or UN3082 depending on the fluid and shipment parameters). When the project requires it, ADR documentary coordination is integrated into project planning from the initial phase under the same single point of contact.

For each wind farm — from an Aldeavieja-style repowering in Ávila, to a new farm in Aragón, to a project in eastern Castilla y León — the PASTOR operations engineering team prepares the file: analysis of the physical parameters of each piece (tower section, hub, drivetrain, nacelle, blade); ACC categorisation by component under DGT or regional regime; configuration proposal by component (conventional low bed, extendable platform, hydraulic modular as applicable); identification of specific equipment required outside the conventional fleet when applicable; turning-radius and clearance simulation to the site, frequently rural, in mountain ranges or interior plateau; coordination with regional roads authorities for the critical points of the final stretch; coordination with the port authority when components enter via Barcelona.

When the lifting window arrives, the tower sections are unloaded in assembly order, the nacelles on their day, the blades with the specific equipment planned for them, and the single point of contact the project requires. And when the project is a repowering, the forward and reverse flows are synchronised in the same construction window, without additional remobilisation costs. The shipper holds a single point of contact: ours.