Solar Panel Watt Calculator India

Solar Power Formula:

\[ P_{solar} = I \times A \times Eff \]

Solar Power Output (P_solar):

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1. What is Solar Panel Watt Calculation?

The solar panel watt calculation estimates the power output of a solar panel based on solar irradiance, panel area, and efficiency. This is particularly important for sizing solar systems in Indian conditions where sunlight availability varies by region.

2. How Does the Calculator Work?

The calculator uses the solar power formula:

\[ P_{solar} = I \times A \times Eff \]

Where:

\( P_{solar} \) — Solar power output (watts, W)
\( I \) — Solar irradiance (W/m²)
\( A \) — Panel area (m²)
\( Eff \) — Panel efficiency (unitless, 0 to 1)

Explanation: The equation calculates the theoretical maximum power output under ideal conditions. Actual output may be 10-20% lower due to factors like temperature, dust, and wiring losses.

3. Importance for Indian Conditions

Details: India receives abundant sunlight (4-7 kWh/m²/day), making solar power highly viable. However, regional variations in irradiance and seasonal changes affect output. This calculator helps estimate potential generation.

4. Using the Calculator

Tips:

For Indian conditions, typical irradiance values range from 800-1000 W/m²
Standard panel sizes are about 1.6 m² (60-cell) or 2.0 m² (72-cell)
Modern panel efficiencies range from 15-22% (0.15-0.22)

5. Frequently Asked Questions (FAQ)

Q1: What is typical solar irradiance in India?
A: Most parts of India receive 4-7 kWh/m²/day, with higher values in Rajasthan and Gujarat, and lower in northeastern states.

Q2: How does panel orientation affect output?
A: In India, south-facing panels at 15-30° tilt typically yield optimal results. Deviation can reduce output by 10-25%.

Q3: What are typical panel sizes?
A: Residential panels are typically 1.6-2.0 m² (60-72 cells), while commercial panels may be larger.

Q4: How does temperature affect output?
A: Output decreases by about 0.5% per °C above 25°C. Indian summers can reduce output by 10-15% due to high temperatures.

Q5: What are realistic efficiency values?
A: Monocrystalline: 18-22%, Polycrystalline: 15-18%, Thin-film: 10-13%. Actual field performance is typically 2-3% lower.