Product Qualification & Commercial Readiness

Long-span Cable-supported Tracker vs. Conventional Single-Axis Tracker

Starting from the mechanical roots of the reverse-lever loading mechanism and eccentric dead load, this document compares the conventional horizontal single-axis tracker with the Aqini cable-supported system item by item: no dampers, eccentric dead load close to zero, 300–1,000 m ultra-long arrays, single-unit drive, AI predictive wind protection and project-level 25-year fatigue type testing.

Comparison Parameter	Conventional horizontal single-axis tracker (industry status quo)	Aqini ultra-long cable-supported tracker (industry innovation)	Key Benefit
Core load-bearing structure	Inborn reverse-lever loading mechanism The slew drive is a very short effort arm, while the torque tube plus PV modules form an extremely long load arm. During tracking, the short arm drives the long arm under heavy load. In high winds the roles reverse: the PV module array becomes an extremely long effort arm that pries the very short load arm of the slew drive, producing violent vibration and surging. Even with dampers and wind protection, the lever amplification cannot be eliminated, so loosening, wear and collapse risks remain.	All-new cable-based rigid integral load-bearing structure No reverse-lever loading defect; every column locks independently, so the whole line acts as a single rigid body. Structural deformation, fatigue and wind-induced collapse are root-cured at the level of mechanical principle.	Principle-level structural upgrade Root-cures the industry's core mechanical problem
Module eccentric dead load	PV modules and purlins are arranged outboard of the torque tube, which means a pronounced eccentric dead load. At a tilt angle of 30°–45°, this eccentric dead load generates a very large secondary bending moment; under wind load the eccentric effect is amplified further, aggravating structural fatigue and component damage.	Structural design that brings module eccentric dead load close to zero The centre of gravity of the PV modules lies on the neutral axis of the load-bearing system, eliminating the secondary bending moment caused by eccentric dead load. A change in tilt angle introduces no additional eccentric load, and wind-induced secondary loads are greatly reduced.	Eliminates eccentric secondary bending moment Significantly reduces long-term alternating loads and extends machine life
Whole-line drive configuration (equivalent 520-module array)	Motors: multiple units, commonly 10–30 Slew drives: multiple units Tracking controllers: 4–10 sets Many drive points and densely distributed failure sources	Globally minimal configuration Only 1 ultra-low-power motor (≤180 W) Only 1 slew drive Only 1 tracking controller Over 90% fewer drive points	Drastic drop in failure rate Far fewer electrical faults, minimal O&M
Wind protection system	Passive wind-speed sensor triggering Must be forced flat at 18–20 m/s Frequent stowing, so major generation losses	AI predictive high-wind protection Forecasts wind conditions in advance Protection starts only at ≥30 m/s No stowing needed in ordinary high winds, so stowing is rare	Significantly more annual generation hours Better wind adaptability than conventional products
Auxiliary anti-vibration structure	Dampers mandatory across the whole line Relies on dampers as a "walking stick" to damp vibration Ageing, leakage, failure and breakage over time Lifetime structural safety hazard	Dampers eliminated completely No reliance on auxiliary components to damp vibration Stability comes from whole-line independent locking + high-prestress cable-based rigid structure Zero risk of damper ageing and failure	Eliminates all common damper problems Major upgrade in structural reliability
Full-machine durability validation system	No factory full-machine fatigue test Only formal paperwork certification, with no real load verification Relies on trial and error on site after the owner commissions the plant Huge loophole in the industry certification system	World-unique, project-specific marathon accelerated fatigue test Mandatory for every project after design completion and before production Completes full-lifecycle fatigue verification equivalent to 25 years within a short period Fills the loophole in industry certification, intercepts all risks before shipment and fills an industry gap	Stops every risk before the product leaves the factory Truly accountable for the plant's 25-year life
Core component replacement	Complex structure requiring whole-assembly alignment and calibration Replacing equipment for 1 MW takes several people several days Cumbersome commissioning, complex re-inspection, heavy downtime losses	Split plug-in, calibration-free modular structure Two skilled workers complete a full 1 MW slew drive replacement within one hour No calibration, no re-inspection — the unit runs immediately after replacement	O&M efficiency greatly improved Minimises O&M labour and downtime losses
Installation difficulty	Numerous parts, scattered points and complex installation procedures High skill requirements for installation crews and high labour cost	Extremely simple structure and high modular integration Straightforward installation logic, quick for crews to learn Easier to install than any conventional single-axis product	Greatly shortens schedules and lowers construction and installation cost
Array layout capability	Conventional single segments are short, with many breaks and many joints Numerous cumulative failure points and poor overall integrity	300–1,000 m ultra-long continuous whole-line array Whole line formed in one piece, with no scattered segments Exceptional system integrity, consistency and stability	Suited to very large desert, flat-land and water-surface utility-scale plants
Volume delivery capacity	Scale capacity constrained by structural complexity	Supported by Tianjin's world-largest PV steel structure industry cluster Annual delivery capacity of 30 GW+ Whole system finalised and frozen, suited to global volume deployment	Ready for concentrated delivery on ultra-large projects worldwide
Long-term operating stability	Reverse-lever fatigue + eccentric dead load + damper ageing + multi-point drive failures Failure rates climb year after year and O&M costs rise annually	No inborn structural defect, no eccentric secondary bending moment, no damper hazards and very few drive points Machine verified through fatigue testing equivalent to 25 years Stability consistent across the whole lifecycle, with no degradation	Plant lifecycle revenue is controllable, stable and predictable

The conventional tracker is an old-generation solution built on a reverse-lever loading mechanism, sustained secondary bending moments from eccentric dead load, passive protection, trial-and-error after commissioning and damper-dependent stabilisation.

The Aqini cable-supported ultra-long tracker is a new-generation, breakthrough product that removes the reverse-lever loading mechanism, brings eccentric dead load close to zero, root-cures eccentric loading by structure, applies AI prediction, mandates pre-production validation, requires minimal O&M and delivers lifetime stability.

The only PV tracking system in the world to achieve: no dampers, zero eccentric dead load, ultra-long arrays, single-unit drive and project-level 25-year fatigue type testing — rewriting the industry's technology and reliability standards.

Manufacturing Capacity & Supply Chain Delivery Capabilities

An asset-light technology system integration model supported by the Jinghai · Daqiuzhuang industrial cluster in Tianjin, with system integration and supporting delivery capacity of 30 GW and above, plus four core delivery guarantees.

I. Business Model: Asset-Light Technology Integration — the Standard Model of Modern High-End Equipment

The company operates on an asset-light model that focuses on core technology, defines the complete set of standards on its own, and integrates the entire chain.

We concentrate on the core R&D of ultra-long cable-supported tracking systems, structural design of 800 m ultra-long arrays, mechanical simulation and verification, AI supercomputing simulation verification, system integration solutions, and full-chain quality control.

We do not adopt a heavy-asset model with self-built, full-industry-chain plants. Global leaders such as Apple, Boeing and mainstream new-energy vehicle manufacturers follow the same approach: keeping top-level core technology in-house while component machining is carried out by qualified professional manufacturing partners.

Modern manufacturing is highly specialized. Building the entire industrial chain in-house requires heavy investment and offers weak production flexibility. Specialized processes are undertaken by our certified manufacturing partners, while we hold the top-level system design, mechanical boundaries, the complete set of technical specifications and the final acceptance standards. This approach balances cost, machining precision, product iteration speed and order delivery flexibility.

II. Regional Industrial Advantages (Jinghai · Daqiuzhuang, Tianjin — a recognized core cluster of the global PV equipment industry)

Within the global PV mounting industry, Daqiuzhuang is a well-known industrial landmark. Overseas PV professionals may not be familiar with many Chinese cities, but most specialists who work in depth with PV mounting know Daqiuzhuang. Beyond supplying the domestic market, the steel, sections, prestressed steel strand and steel structural components produced in the area are exported directly and indirectly around the world in large quantities, making the region one of the core sources of the global PV supply chain.

Supported by the mature industrial cluster of Daqiuzhuang, Jinghai District, Tianjin, the supporting resources are complete:

Full-range steel supply: plates, strip steel, pipes, sections and special-shaped steel in a complete range, with ample ready stock and efficient material allocation.
Prestressed steel strand cluster: Tianjin is China's core production area for prestressed steel strand and a stable supply base for the key primary material of this product, with stable sources and traceable quality.
Gearbox and transmission component support: several local precision transmission enterprises can supply PV tracking gearboxes and drive accessories in batch.
Steel structure welding and deep processing: a mature steel structure finishing and welding industry with deep process experience and strong standardized batch processing capability.
Hot-dip galvanizing and anti-corrosion processing: several professional hot-dip galvanizing plants with ample anti-corrosion capacity, ensuring the long-term outdoor durability of the mounting system.
Tianjin Port logistics hub: adjacent to Tianjin Port with a well-developed road and sea transport system, enabling efficient domestic dispatch and easy container shipping for overseas projects.

III. Industry Reference Data (publicly verifiable)

Daqiuzhuang, Jinghai District, Tianjin is a core production area for PV mounting in China. Public industry statistics show that most of China's PV mounting production capacity comes from this industrial cluster, and that large quantities of welded pipe and steel structure products are applied in key domestic energy projects and exported to many countries.

IV. Large-Scale Delivery Capacity

Relying on Tianjin's complete industrial cluster and on standardized, modularized and finalized product design, the company's system integration and supporting delivery capacity can reach 30 GW and above.

This delivery capability is realized through a supply chain pool of certified manufacturing partners rather than the capacity of a single self-owned plant. It is not constrained by a single plant, fixed equipment or headcount, and production can be scheduled dynamically according to orders, giving greater order flexibility than a conventional fixed factory.

Important note: all components are produced by manufacturing partners audited and certified by us, strictly in accordance with our complete set of drawings, manufacturing specifications and inspection standards. We are responsible for first-article inspection, in-process quality control and final factory acceptance, ensuring stable product performance and traceable quality.

V. Four Core Delivery Guarantees

Ample order flexibility: supported by the complete local cluster, large-scale centralized PV batch orders can be undertaken to handle periodic demand for large orders.
Efficient supply response: localized support for steel, accessories, anti-corrosion and processing reduces cross-region sourcing and shortens delivery lead times.
Standardized quality control: we issue unified design, mechanical, assembly and acceptance standards, and partner manufacturers produce according to our technical documents, ensuring consistent performance across multiple batches.
Overall cost advantage: the localized industrial cluster reduces multi-layer distribution and long-distance warehousing and transport, making the overall project cost competitive.

VI. Model Summary

Relying on the mature steel and PV supporting industrial cluster in Jinghai, Tianjin, and combining an asset-light operating model that emphasizes core technology, self-managed standards and full-chain integration, the company has comprehensive advantages in undertaking large orders, delivering quickly, maintaining stable quality and controlling cost, providing a commercially mature solution for ultra-long array cable-supported tracking systems

Wind Tunnel Test Boundaries & AI Supercomputing Simulation Verification

Defining the verifiable scope of scaled aeroelastic wind tunnel tests and the node fatigue failure modes they cannot cover, and setting out the combined verification system of high-fidelity fluid-structure coupled aeroelastic simulation, full-scale bench fatigue testing and whole-machine numerical simulation.

Preface

This product is an 800 m-class, ultra-long, globally coupled cable-supported tracking system. Its mechanical system and failure mechanisms share similarities with conventional rigid PV tracking systems and long-span bridges, but there are also fundamental differences.

Constrained by the full length of the array, a complete continuous model that retains the globally coupled effect cannot undergo aeroelastic testing in a commercial wind tunnel. In this situation, a high-fidelity CFD plus fluid-structure coupled aeroelastic numerical simulation can be used as an alternative assessment method, relying on parallel supercomputing and supported by an AI surrogate model for rapid screening across multiple load cases. It evaluates the machine's macro wind-induced stability, global resonance, inter-bay coupled vibration and macro wind-induced instability risks, and outputs a calculation report that third parties can review.

In the industry, scaled aeroelastic wind tunnel tests of bridges based on the Froude number (Fr) similarity criterion can only be used to assess the overall dynamic stability of a structure; they cannot characterize the cumulative node fatigue failure modes of this ultra-long cable-supported tracking system. A single wind tunnel test therefore cannot complete an all-dimensional performance assessment of the whole machine. A combined verification system is required: "wind tunnel macro stability verification / high-fidelity fluid-structure coupled aeroelastic simulation + full-scale bench fatigue testing + full-machine numerical simulation".

I. Scope Verifiable by Scaled Aeroelastic Wind Tunnels (bridge Fr similarity criterion)

Referring to the mature test methods for long-span suspension and cable-stayed bridges, priority is given to ensuring Froude number gravity similarity, modal stiffness similarity, mass distribution similarity, and cable sag and self-weight similarity, while moderately relaxing Reynolds number matching and adding roughness strips on the model surface to correct flow separation. On this basis, the scaled aeroelastic model can scientifically and effectively complete the following global macro stability assessments:

Verify the wind-induced resonance risk of the ultra-long array, and assess the overall large-amplitude vibration caused by coupling between incoming-flow fluctuation frequencies and the structure's natural frequencies;
Observe the multi-bay cable linkage effect, inter-bay vibration phase differences, and the globally coupled vibration induced by upstream and downstream wake interference;
Assess overall galloping, torsional flutter, large-scale vortex-induced vibration and other wind-induced instability risks of the whole machine;
Qualitatively evaluate macro risks under extreme wind loads, such as overall non-linear swaying of the array, global instability and overturning.

In short: a scaled aeroelastic wind tunnel can scientifically determine whether this structure suffers macro safety problems such as overall collapse or global resonance instability under high-wind conditions. This verification logic is equivalent to full-bridge aeroelastic model testing for long-span bridges and complies with common engineering industry standards.

II. Core Failure Modes Not Covered by Scaled Aeroelastic Wind Tunnels

Wind tunnel testing for long-span bridges is positioned to verify overall dynamic instability only; issues such as cable slippage, connector wear and node fatigue in bridges are addressed through separate component bench tests rather than wind tunnel testing.

For the ultra-long cable-supported tracking system, however, the core failure risk is concentrated in long-term cumulative fatigue damage at the nodes. Such damage cannot be reproduced at the physical mechanism level on a scaled model. The core limitations are as follows:

1. Distortion of Cable Microscopic Mechanical Properties

The prototype uses 15.2 mm prestressed steel strand. At a 1:10 scale, the diameter is only about 1.5 mm; at 1:20 scale it is less than 1 mm. A scaled thin cable cannot reproduce the multi-wire stranding characteristics, inter-wire friction, strand-clamp gripping and slippage, or tensioning damping behaviour of the prototype strand, so the cable fatigue mechanism no longer holds.

2. Mechanical Assembly Clearances Cannot Be Scaled Proportionally

The slewing hinge pairs, bolted connections and strand-clamp clamping clearances of the mounting system are geometric assembly clearances that do not satisfy fluid-structure similarity criteria. A scaled model cannot reduce assembly clearances in the same proportion, so reciprocating micro-motion, clearance impact and local alternating load effects cannot be faithfully reproduced.

3. Time-Sequenced Cumulative Fatigue Damage Cannot Be Captured

Wind tunnel tests can only observe instantaneous vibration amplitudes and macro displacements. They cannot simulate the time-sequenced cumulative fatigue damage — cumulative node micro-slip, strand clamp relaxation, connector wear and local cracking — that occurs over tens of thousands to hundreds of thousands of cycles.

This is the core fatigue failure mode that bridge wind tunnel tests do not assess but that this cable-supported tracking system must assess as a priority.

III. Authoritative Summary of Test Boundaries

Scaled aeroelastic wind tunnel: applicable to verifying the global dynamic stability, overall resonance, inter-bay coupled vibration and macro wind-induced instability of the ultra-long cable-supported array; the conclusions carry engineering recognition.
Scaled aeroelastic wind tunnel: cannot quantify the alternating loads introduced by node micro-motion slippage, strand clamp friction and assembly clearances, and cannot be used to determine the fatigue reliability of the mounting system over a 25-year operating cycle.

To summarize: a wind tunnel can verify that the mounting system will not shake itself apart in a single event, but it cannot assess the risk of node fatigue loosening during long-term operation.

IV. Complete, Third-Party Verifiable Combined Verification System

Based on the technical boundaries above, this product adopts a multi-dimensional combined verification scheme that covers both macro stability and microscopic fatigue performance:

1. Bridge-Type Scaled Aeroelastic Wind Tunnel Test (optional)

Constrained by the full array length, it is not possible to build a complete continuous model that retains the globally coupled effect. In this situation, a high-fidelity CFD plus fluid-structure coupled aeroelastic numerical simulation can be used as an alternative assessment method, relying on parallel supercomputing and supported by an AI surrogate model for rapid screening across multiple load cases. It evaluates the machine's macro wind-induced stability, global resonance, inter-bay coupled vibration and macro wind-induced instability risks, and outputs a calculation report that third parties can review.

2. Full-Scale Loaded Accelerated Fatigue Test of the Whole Machine (core fatigue verification)

Load tests are carried out using the real cable system, the real slewing mechanism and real node fittings, completing within a short period a fatigue test equivalent to a 25-year operating cycle and more than 10,000 cycles. Node micro-motion, strand clamp slippage and reciprocating alternating loads are reproduced to verify structural strength and fatigue performance.

3. Full-Scale Whole-Machine Aeroelastic Numerical Simulation Review

Wind tunnel macro vibration parameters (or CFD aeroelastic simulation results) and bench fatigue parameters are coupled into the whole-machine model. Owners and third-party institutions can build and recalculate the model independently, completing a closed-loop evaluation of whole-machine strength and fatigue performance across all load cases.

V. Statement of Objective Dimensional Constraints

For this 800 m continuous cable-supported tracking array, a 1:10 or 1:20 scale model intended to fully retain upstream and downstream wake effects and inter-bay vibration coupling would have a total model length of 80 m and 40 m respectively.

Aeroelastic tests for conventional long-span bridges and cableways generally use only a key local section of the main span rather than reproducing the full length. However, this cable-supported tracking system is a continuously and globally coupled system: upstream and downstream wake effects, vibration phase differences and dynamic cable force transfer act continuously along the full length of the array. A model that takes only a local section loses the long-distance globally coupled effect, and the test results cannot represent whole-machine performance.

Existing commercial boundary-layer wind tunnel chambers cannot accommodate a complete continuous array model of 40–80 m. If only a local bay section is tested, the resulting data represent a local unit only and are insufficient to evaluate the global dynamic stability of the 800 m machine.