NLC Ltd issue Tender for Arrangement of of Land for development of ISTS Connected Solar Power Project – EQ

Summary:

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# **1. Objective of the Specification**

The document provides the **complete technical requirements, standards, and performance parameters** for installing a **Grid-connected Rooftop Solar Photovoltaic System (SPV)**.
It covers all materials, engineering standards, installation norms, testing & commissioning requirements, and operational guidelines.

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# **2. Scope of the Work**

The contractor must design, supply, install, test and commission the rooftop SPV system, ensuring compliance with:

### **a) Functional Requirements**

* Deliver solar power to the facility’s internal system.
* Operate in **parallel with the grid**.
* Stop feeding power to the grid during **grid fault / outage** (anti-islanding compliance).

### **b) Standards & Compliance**

The complete system must comply with:

* **IEC** standards for modules, inverters, cables, safety devices
* **BIS/Indian Standards**
* Local power utility norms
* CEA grid connectivity regulations

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# **3. System Components & Key Technical Requirements**

## **A. Solar PV Modules**

* Crystalline technology (mono/poly).
* Rated power as per BOQ.
* Modules must comply with **IEC 61215**, **IEC 61730**.
* Minimum **performance warranty**:

* **10 years** – product warranty
* **25 years** – output performance (≥90% at 10 yrs, ≥80% at 25 yrs)

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## **B. Grid-Connected Inverter**

* Must conform to **IEC 61683**, **IEC 60068**, **IEC 62116** standards.
* Anti-islanding protection mandatory.
* Should automatically synchronize with the grid.
* Efficiency > **95%** (typical).
* Meters and protections as per utility norms.

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## **C. Cables & Wiring**

* **Copper/Aluminum** cables depending on application.
* UV-resistant, outdoor-grade cables for DC side.
* Armored cables for AC side where required.
* Cable routing through conduits / trays as per industry standards.

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## **D. Protection System**

* **AC & DC distribution boxes**
* Surge Protection Devices (**SPDs**)
* Earthing system (structural, equipment earthing)
* Lightning protection as per IS standards
* MCB/MCCB/Isolators for safety and isolation

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## **E. Mounting Structure**

* Hot-dip galvanized steel / aluminum.
* Designed for **local wind speed & load conditions**.
* Tilt angle as per geographical location for optimal solar generation.

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# **4. Installation & Commissioning Requirements**

The contractor must perform:

* Pre-installation site assessment
* Transport, unloading and storage of materials
* Mounting structure erection
* Module installation
* Inverter, cabling & protection system installation
* Module string testing
* System synchronization with the grid
* Final acceptance testing and performance demonstration

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# **5. Documentation & Warranty**

Contractor must provide:

### **A. Documentation**

* Technical data sheets
* Warranty certificates
* Single Line Diagram (SLD)
* Operation & Maintenance manuals
* Test reports (factory & site)

### **B. Warranty Requirements**

* **PV Modules:** 25-year performance
* **Inverter:** 5-year minimum
* **BOS Components:** Standard OEM warranty
* Contractor must ensure **defect-free operation** for the warranty period.

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# **6. Safety, Codes & Standards**

All work must comply with:

* National Electrical Code
* CEA safety regulations
* Local DISCOM safety guidelines
* Occupational health and safety norms

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# **7. Overall System Performance**

* System must operate efficiently under varying irradiation.
* Energy output must meet design expectations.
* Real-time monitoring desirable (if included in tender’s general terms).
* Must withstand environmental conditions as per IEC/IS tests.

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