0.36 MWp BIPV Solar Canopy · Dongguan
Commercial BIPV Solar Canopy · Detailed Engineering Design & Grid Interconnection Approval
Commercial BIPV Solar Canopy · Detailed Engineering Design & Grid Interconnection Approval
Project Overview
| Parameter | Value |
|---|---|
| System Capacity | 0.36 MWp (588 × 615 Wp Bifacial Double-Glass Modules) |
| Inverter Solution | 3 × Huawei SUN2000-110KTL-M2 (110 kW String Inverters, 330 kW Total) |
| Mounting Type | BIPV Waterproof Solar Canopy |
| Location | Dongguan, Guangdong, China |
| Design Period | May 2025 |
| Commissioning Date | July 2025 |
| Design-to-Grid Timeline | 60 Days (Design → Approval → Construction → Grid Connection) |
| Est. Annual Yield (Year 1) | ~380,000 kWh (379,683 kWh) |
| CO₂ Reduction (Year 1) | ~217 Tons / Year |
Design Scope
This project demonstrates SJ Solarhub's end-to-end design capability—from site survey to full detailed drawing package and grid interconnection approval. Our design team holds national-grade new energy design qualifications and is familiar with the technical standards of major utility companies in China and overseas, ensuring drawings pass review on the first submission.
Site Survey & Multi-System Assessment
Beyond roof structure measurement, we conducted detailed surveys of the existing electrical distribution system and cable routing in the distribution room. We assessed PV interconnection point compatibility and capacity margins, providing precise inputs for subsequent drawing design.
UAV Aerial Survey & 3D Modeling
High-resolution orthophoto captured by drone, combined with on-site measurement data, imported into professional software for 1:1 three-dimensional modeling. Precise simulation of module layout, shadow occlusion, and steel structure load distribution.
Full Detailed Engineering Drawing Package
Delivered a complete set of construction drawings meeting utility company approval standards, covering PV, structural, and electrical disciplines. Drawing depth satisfies grid interconnection application requirements.
| No. | Drawing Title | Purpose |
|---|---|---|
| 1 | PV Module Layout Plan | Module arrangement, string configuration, maintenance corridor planning |
| 2 | Steel Structure Detail Drawing | Canopy frame dimensions, joint connections, load calculations |
| 3 | Waterproof Mounting Detail | Waterproofing node details, drainage design, sealing treatment |
| 4 | Grid Connection Diagram | PV interconnection point, protection configuration, metering scheme |
| 5 | Electrical Single Line Diagram | Primary system wiring, inverter configuration, distribution scheme |
PV Module Layout Plan
Steel Structure Detail Drawing
Waterproof Mounting Detail
Grid Connection Diagram
Electrical Single Line Diagram
Grid Interconnection Approval Support
The project drawings passed utility review on the first submission, with only 60 days from design to grid connection. We understand the technical review focus of grid companies and proactively address interconnection compliance during the drawing design phase, avoiding repeated revisions and schedule delays.
| Stage | Scope of Work | Deliverable |
|---|---|---|
| Step 1 | Grid Connection Application | Submit interconnection application and project filing documents |
| Step 2 | Drawing Technical Review | Submit complete drawing package for technical review |
| Step 3 | Drawing Approval Obtained | First-pass approval, written approval from utility company |
| Step 4 | Power Supply Application | Sign power supply contract, install metering equipment |
| Step 5 | Interconnection Permit | Obtain formal grid interconnection permit |
| Step 6 | Commercial Operation | Grid-connected in July 2025, entering commercial operation |
Design Highlights
BIPV Waterproof Solar Canopy Integration
PV modules serve dual functions of power generation and architectural shading/waterproofing. Steel frame structure validated through load and wind-pressure calculations — adapted to Dongguan's typhoon-prone climate.
Bifacial Module High Efficiency
615 Wp bifacial double-glass modules deliver 10% rear-side gain, fully utilizing ground-reflected light in elevated canopy installations.
Huawei Smart Inverter Solution
3 × 110 kW string inverters with PLC communication and IV curve diagnosis. 330 kW total inverter capacity scientifically matched with 362 kWp module capacity.
Distribution System Compatibility
During the survey phase, we assessed existing distribution-room capacity and cable routing. The interconnection design does not exceed original protection thresholds, ensuring grid safety.
First-Pass Drawing Approval
All 5 categories of detailed drawings comply with China Southern Power Grid interconnection standards. Zero revisions from submission to approval — design to grid connection in just 60 days.
Rapid Delivery Capability
Design started May 2025, grid-connected July 2025 — validating our EPC execution efficiency from design, procurement and construction through commissioning.
Construction & Commissioning
From drawing approval to plant completion, we provide full-process technical support. Below are the key construction milestone records:
Yield & Environmental Impact
Based on Dongguan area annual equivalent peak sun hours of ~1,150 h, System PR=83%, bifacial gain of 10%, and module degradation of 0.55%/year:
- ●First-Year Yield: 379,683 kWh (~380,000 kWh) — enough to power ~70–90 small-to-medium C&I users annually
- ●First-Year CO₂ Reduction: 217 tons — equivalent to the annual carbon absorption of ~12,000 mature trees
- ●25-Year Total Yield: ~8.9 million kWh (factoring in 0.55%/year module degradation)
- ●Lifetime CO₂ Reduction: ~5,080 tons
About SJ Solarhub
SJ Solarhub provides integrated EPC solutions covering PV, energy storage, and EV charging infrastructure for commercial, industrial, and residential clients. With 12 years of deep expertise in the new energy sector, our team holds national-grade new energy design qualifications and electrical engineering construction licenses, having cumulatively completed project designs exceeding 150 MW across China and international markets.
We deliver turnkey solutions from site survey, system design, full detailed drawing package, grid interconnection approval support, equipment procurement, construction, to grid-connection O&M, supporting major global certification systems (IEC / TÜV / CE / SAA / ETL).
Our design team is familiar with the interconnection technical standards of China Southern Power Grid, State Grid, and major overseas utility companies, capable of delivering complete drawing packages that meet local approval requirements, ensuring efficient project progression from design to grid connection.
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