PV Module Shadow Calculator
PV Module Shadow Calculator
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Description:
The PV Module Shadow Calculator is a tool designed to calculate the shadow lengths and inter-row spacing for photovoltaic (PV) modules based on various inputs. This calculator is particularly useful for solar panel installations, helping to determine optimal panel placement and alignment for maximum solar exposure and efficiency.
How to Use the Calculator:
1. Enter Module Details:
- Module Length (m): Enter the length of your PV module in meters.
- Tilt Angle (°): Input the angle at which the PV module is tilted.
2. Input Geographic Coordinates:
- Latitude: Enter the latitude of your location. This should be a positive number for the Northern Hemisphere and negative for the Southern Hemisphere.
- Longitude: Enter the longitude of your location. This should be positive for locations east of the Prime Meridian and negative for locations west.
3. Update Solar Position:
- After entering the latitude and longitude, click the "Update Solar Position" button. This will calculate and display the Sun Elevation and Sun Azimuth for your location at solar noon.
4. Mounting Height (Optional):
- If relevant, enter the height at which the PV modules are mounted above the ground.
5. Calculate Shadow Lengths and Inter-row Spacing:
- Click the "Calculate Shadow" button to compute the shadow lengths and inter-row spacing.
- The calculator will display:
- Shadow Length Opposite Sun (m): The length of the shadow cast directly opposite the sun.
- Shadow Length E-W (m): The East-West component of the shadow.
- Shadow Length N-S (m): The North-South component of the shadow.
- Inter-row Spacing (m): The recommended spacing between rows of PV modules to avoid shadow overlap.
Important Notes:
- The calculator assumes solar noon for calculating the sun's position, which is the time of day when the sun reaches its highest point in the sky.
- Negative values for the Sun Elevation indicate that the sun is below the horizon; in such cases, shadow calculations are not possible, and the calculator will alert the user.
- The Shadow Length N-S might appear as a negative value, indicating the direction of the shadow; this can be interpreted as a positive value in practical terms.
- This tool is most effective during daylight hours when the sun is above the horizon.
Applications:
This calculator is ideal for solar panel installers, architects, and homeowners planning solar installations. It ensures that PV modules are placed in a manner that maximizes sunlight exposure throughout the day and prevents shading from affecting solar panel efficiency.