# Solar PV Size Calculator Online

Last updated on by Editorial Staff

## Quick Guide to Use Solar PV Size Calculator

• Enter your monthly energy consumption in kilowatt-hours (kWh).
• Input the average peak sun hours per day for your location.
• Provide the derate factor (a decimal value representing system losses, also called solar panel efficiency).
• Click the “Calculate” button to determine the recommended Solar PV Size in kW.
• Use the “Reset” button to clear the fields and start a new calculation.

## Formula

Solar PV size in kW = Daily energy consumptions in kWh / (peak sun hours per day X derate factor in decimals)

Where, daily energy consumption = monthly energy consumption kWh/ 30days

## What is the Solar PV Calculator?

The Solar PV Calculator is a tool designed to estimate the required size of a photovoltaic (PV) solar system based on monthly energy consumption, peak sun hours, and a derate factor.

It assists users in planning solar installations for optimal energy production.

## Who Can Use This Calculator?

This calculator is useful for homeowners, businesses, and individuals considering solar panel installations. It caters to those interested in understanding the approximate size of a solar PV system needed to meet their energy demands.

• Residential
• Commercial
• Industrial

## Benefits of Using This Calculator

• Precision: Obtain a more accurate estimate of the solar PV size needed for your energy requirements.
• Cost-Efficiency: Plan your solar investment more effectively, optimizing for cost and performance.
• Sustainability: Contribute to environmental sustainability by adopting solar energy solutions.

## FAQs

### Can I use this calculator for any location?

Yes, you can use it globally. Ensure to input accurate values, especially for peak sun hours based on your specific geographical location.

### What is the derate factor?

The derate factor accounts for system losses due to various factors like shading, inverter inefficiencies, etc.

### Why is monthly consumption used in the calculator?

Monthly consumption provides a comprehensive overview. Daily consumption is derived by dividing it by 30 for a standard month.

## Conclusion

In conclusion, the Solar PV Calculator is a crucial tool for anyone considering a solar installation. By accurately estimating the required system size, users can make informed decisions, contributing to a sustainable and cost-effective energy future.