366.6 kW Ground Mount Solar Project in Tokushima, Japan
A fixed-tilt ground-mounted PV project developed for 940 × 390 W modules using multiple table geometries, 15° array tilt and ground screw foundations. The structural system combines aluminum rails, rail clamps, pillars and diagonal bracing across several site zones.
Key Design Inputs
The supplied site plan, structural drawings and quotation package define the project capacity, module format, fixed-tilt geometry, environmental inputs and ground screw foundation concept.
Several Array Zones Across an Irregular Site
The 940 modules are distributed across multiple PV areas rather than one rectangular field. Different table lengths allow the mounting system to follow the available boundaries and access corridors while using the same basic structural architecture.
Multiple PV array zones are arranged across the irregular Tokushima site, with repeated table structures following the available terrain.
Site-driven table planning
The project uses standard and irregular tables rather than forcing a single row length across the entire site.
- Module orientation: landscape
- Fixed tilt: 15°
- Main table depth: four module rows
- Largest standard table: 4 × 23
- Large irregular table: 8 × 20 minus 28
- Total project modules: 940
Repeatable and Irregular Tables for 940 Modules
The mounting package contains 23 structural tables. Multiple geometries were used to fit the real site while keeping a common fixed-tilt structural concept.
15° Aluminum Ground Mounting Architecture
The structural drawings show modules clamped to large aluminum rails. Rail clamps connect the module-support layer to the primary frame, while pillars and diagonal braces transfer the forces toward the ground screw-supported bases.
Fixed-tilt table structure showing the pillars and diagonal bracing that stabilize the module support frame.
Common structural components
- Main members: AL6005-T5
- Hardware: Aluminum&SUS304
- Module retention: mid / end clamps
- Rail interface: rail clamps
- Stability: diagonal bracing
- Foundation interface: ground screw + base
Foundation Selection Linked to Soil and Field Testing
The quotation package documents 320 ground screws for the mounting system. The structural drawings explicitly state that the final foundation specification should follow geotechnical investigation or on-site testing.
Project-specific screw reference
- Quantity documented: 320
- Material: Q235B steel
- Reference length: 1600 mm
- Flange diameter: 200 mm
- Wall thickness: 3 mm
- Final selection: soil / field verification required
Ground screw foundation detail showing the transition from the steel screw and base connection to the supporting pillar.
Rail, Clamp and Bracing Interfaces
Connection detail showing how rails, clamps, braces and pillars are coordinated within the ground mount structure.
Keep the design revisions coordinated
The module dimensions, table geometry, rail arrangement, pillar spacing, bracing and foundation reactions are connected. A module or layout revision should trigger a review of the structural configuration and component list.
What This Tokushima Ground Mount Project Shows
Table Geometry Can Follow the Site
Several structural table sizes allow the PV field to fit irregular site zones without forcing one standard row length everywhere.
Foundation Design Starts with the Ground
The project drawings tie final foundation selection to geotechnical investigation or field testing, which is essential for ground screw systems.
Wind, Snow and Structure Share One Design Basis
The 36 m/s wind and 45 cm snow inputs belong to this project. Rails, braces, pillars, fasteners and foundations should remain coordinated under the same structural assumptions.
About This 366.6 kW Tokushima Project
How many modules are used?
The electrical layout lists 940 modules rated at 390 W each, giving 366.6 kW total DC capacity.
What tilt angle is used?
The structural mounting drawings use a 15° fixed array tilt.
What foundation concept is used?
The project uses ground screws. The quotation package documents 320 screws, while the drawings require the final specification to follow soil or field verification.
Why are there different table sizes?
The site is divided into multiple irregular zones. Several table geometries allow the mounting layout to fit the available field widths and boundaries.
What are the wind and snow inputs?
The structural drawings state 36 m/s wind speed and 45 cm snow for this project reference.
Can the same 1600 mm ground screw be reused elsewhere?
No. Ground screw dimensions and capacity should be selected from the actual soil conditions, structural reactions and project-specific testing.
Need a Ground Mount Configuration for Your Site?
Send the module datasheet, site plan, topography, wind and snow requirements, preferred tilt, geotechnical information and available field-test data. These inputs can be used to coordinate the table geometry, rails, bracing and foundation concept.