1. System Overview

• System Type: On-Grid (Grid-Tied, without battery)

• Capacity: 4 kWp (DC)

• Purpose: Residential rooftop solar under PM Surya Ghar scheme

• Subsidy Eligibility: ✔ Yes, as per MNRE guidelines

  • Subsidy: ₹18,000/kWp up to 3 kWp (₹54,000) + ₹9,000/kWp for next 1 kWp (₹9,000)

  • Total Subsidy for 4 kWp = ₹63,000

• Expected Free Units: Up to 400–500 units/month (location dependent)

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2. Major Components

1. Solar PV Modules

   • Technology: Mono PERC / Half-Cut (preferred)

   • Wattage: 540–550 Wp (typical)

   • No. of Panels: ~8 panels (8 × 540 Wp = 4,320 Wp DC)

   • Efficiency: ≥ 20%

   • Certifications: BIS / IEC 61215, IEC 61730

   • Warranty: 25 years (performance), 10–12 years (product)

2. Grid-Tied Inverter

   • Capacity: 4 kW, Single Phase

   • MPPT: 2 MPPT inputs preferred

   • Conversion Efficiency: ≥ 97%

   • Features: Anti-islanding, Wi-Fi/RS485 communication, remote monitoring

   • Certifications: MNRE / IEC 62109 / IS 16169

   • Warranty: 5–10 years

3. Module Mounting Structure (MMS)

   • Material: Hot Dip Galvanized Steel / Aluminium Alloy

   • Tilt Angle: Site-specific (10°–25° typical)

   • Design Wind Speed: Up to 150 km/h

   • Coating: ≥ 80 microns galvanization

4. Balance of System (BOS)

   • Cables:

     • DC: UV-resistant solar cable (4/6 sqmm copper)

     • AC: 2.5/4 sqmm copper depending on run length

   • Connectors: MC4 IP67 certified

   • DCDB/ACDB: With MCB, MCCB, Isolators, SPD (Type II)

   • Earthing: 2–3 separate earth pits (PV array, inverter, LA)

   • Lightning Arrestor: Provided as per IS 3043

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3. Electrical Specifications

• DC Capacity: 4.0 kWp

• DC Voltage Range: 300–600 V DC (string design)

• DC Current (per string): ~10–12 A

• AC Output Power: 4.0 kW @ 230 V AC, 50 Hz (Single Phase)

• AC Output Current: ~17–18 A

• Power Factor: 0.9 Lag to 0.9 Lead

• Grid Compliance: CEA & State DISCOM norms

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4. Performance

• Daily Generation: ~16–20 units/day

• Annual Generation: ~5,800–7,200 units/year (site-dependent)

• Free Electricity Benefit: ~400–500 units/month free under scheme

• CO₂ Reduction: ~6 tons/year

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5. Protections & Safety

• DC Side: SPD (Type II), DC Isolator, Fuses (if >1 string)

• AC Side: SPD (Type II/III), AC Isolator/MCB/MCCB

• Earthing: Dedicated PV earthing + Inverter earthing + Lightning protection

• Inverter Protections: Anti-islanding, Over/Under Voltage, Overcurrent

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6. Standards & Compliance

• Modules: IEC 61215 / 61730, IS 14286

• Inverter: IEC 62109, IS 16169, IEC 61683

• Installation: As per IS 3043, CEA, MNRE & DISCOM standards

• Vendor: Must be empaneled under MNRE/State Nodal Agency

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7. Warranty & O&M

• Modules: 25 years performance warranty (80% output at 25 years)

• Inverter: 5–10 years standard warranty

• MMS & BOS: 5 years

• Maintenance: Annual inspection, cleaning every 1–2 months, monitoring through inverter app