Quy trình & nghề nghiệpProcess & careers · BàiLesson 3/4
The Four Phases of a Solar Project
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Solar Knowledge HubBốn giai đoạn của một dự án SolarFour phases of a solar project
Nhìn từ trên cao, mọi dự án mái nhà đều đi qua bốn giai đoạn. Chất lượng đầu ra của giai đoạn trước quyết định chất lượng của giai đoạn sau.From above, every rooftop project moves through four phases. The quality of each phase's output determines the quality of the next.
| Giai đoạnPhase | Công việc chínhMain work | Đầu raDeliverable |
|---|---|---|
| Khảo sátSurvey | Đo đạc, đánh giá, tư vấnMeasure, evaluate, consult | Báo cáo và phương án sơ bộSurvey report & preliminary proposal |
| Thiết kếDesign | Tính toán, vẽ sơ đồ, bóc vật tưCalculate, draw diagrams, compile BOM | Hồ sơ thiết kế và dự toánDesign package & cost estimate |
| Thi côngInstallation | Lắp đặt, đấu nối, chạy thửInstall, wire, commission | Hệ chạy đúng thiết kếSystem built to design |
| Vận hành bảo trìO&M | Theo dõi, kiểm tra, xử lý sự cốMonitor, inspect, troubleshoot | Hệ ổn định lâu dàiStable long-term system |
Bốn giai đoạn không tách rời mà nối nhau bằng chất lượng đầu ra. Báo cáo khảo sát sơ sài → thiết kế phải đoán → thi công phải chỉnh sửa tại chỗ → hệ vận hành kém ổn định. Đầu tư công sức vào khảo sát và thiết kế luôn rẻ hơn sửa sai ở thi công và vận hành.The four phases are not isolated: they are linked by output quality. A thin survey report → designer must guess → installers improvise on site → system runs below potential. Investing in thorough survey and design is always cheaper than fixing mistakes during installation and O&M.
Bốn giai đoạn là cách dễ nhất để khách thấy họ mua một dịch vụ bài bản chứ không chỉ mua thiết bị. Nhấn mạnh giai đoạn vận hành bảo trì (công ty đồng hành sau khi lắp, không bỏ mặc) là điểm tạo niềm tin và khác biệt rõ nhất.The four phases are the easiest way to show customers they are buying a professional service, not just equipment. Emphasising the O&M phase (we stay with you after installation, not just deliver and leave) is the clearest trust-builder and differentiator.
Viewed from above, every rooftop solar project moves through the same four phases. Each phase takes the previous phase’s output as its input and produces a deliverable for the next. This document summarises those four phases so that newcomers have a complete map before diving into each part in detail.
For: newcomers who need the big picture, project managers, and sales staff explaining the project timeline to customers.
Quick summary
The four sequential phases are survey, design, installation, and operation and maintenance. This is the backbone of every project, large or small.
Each phase has a clear deliverable. The survey produces a report and a preliminary design concept; design produces a full documentation package and cost estimate; installation delivers a system running correctly to design; and operation and maintenance keeps the system stable over the long term.
Input quality determines output quality. A thorough survey leads to an accurate design, careful installation, and efficient operation, so skipping or rushing the early phases to move faster is never worth it.
The four phases
Phase one is the survey. Work includes surveying the roof and installation site, assessing the existing electrical system, taking measurements and collecting data, evaluating current conditions, and consulting on the customer’s needs. The deliverable is a survey report and preliminary design concept, which forms the foundation for design.
Phase two is design. Work includes laying out the PV array, designing the electrical system, performing engineering calculations, drawing single-line and wiring diagrams, preparing a bill of quantities (BOQ), and compiling the full technical documentation package. The deliverable is a complete design package and material cost estimate, which forms the foundation for installation.
Phase three is installation. Work includes procuring materials, mounting the PV array, installing the inverter and distribution boards, running cables and making connections, commissioning and testing, and formal handover. The deliverable is a system operating safely and in accordance with the design.
Phase four is operation and maintenance. Work includes monitoring the system through the inverter app, scheduled inspections, cleaning the panels, electrical safety checks, fault-finding and repair, and production reporting. The deliverable is a system that operates stably and efficiently over the long term.
| Phase | Key activities | Deliverable |
|---|---|---|
| Survey | Measurement, assessment, consultation | Report and preliminary design concept |
| Design | Engineering calculations, diagrams, BOQ | Design package and cost estimate |
| Installation | Mounting, wiring, commissioning | System built to design |
| Operation & maintenance | Monitoring, inspection, fault resolution | Long-term stable system |
The four phases are not isolated: they are linked by the quality of each deliverable. A superficial survey forces the designer to guess, producing a design that diverges from site reality, which forces the installation crew to improvise on-site, and ultimately results in a system that operates poorly. This is why investing effort in the survey and design phases is always cheaper than correcting mistakes during installation and operation.
When walking a customer through the project process, the four phases are the simplest way to show that they are buying a professional end-to-end service, not just equipment. Emphasise that the company stays engaged through the operation and maintenance phase (not disappearing after installation), since long-term support is something many competitors skip.