Go to the previous page
All posts
Businesses
5 Mins Read

Guide: How To Estimate Required Solar Installation Capacity?

Published on
May 21, 2024
Author
Subscribe to newsletter
By subscribing you agree to with our Privacy Policy.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Share this post

Switching to solar energy is a strategic move that benefits both your financial bottom line and the environment. If you're a small business owner or a homeowner, understanding how to estimate the solar capacity you need is crucial. This detailed guide will walk you through the steps necessary to determine the optimal solar capacity for your property, ensuring efficiency and cost-effectiveness. We'll use a practical example featuring Mr. Kulkarni, a small factory owner from Pune, to illustrate the process.

Understanding Solar Capacity Requirements

Before diving into the calculations, it's important to understand what solar capacity is. Solar capacity, measured in kilowatt-peak (kWp), represents the maximum output of a solar power system under ideal conditions. Estimating the correct solar capacity ensures that your system meets your energy needs without over-investing in unnecessary capacity.

Step-by-Step Guide to Estimating Solar Capacity

Step 1: Calculate Your Average Electricity Bill

Your electricity bill is a critical factor in determining the solar capacity you need. Here's how to approach it:

Collect Your Bills:

Gather your electricity bills for the past 12 months. This comprehensive data accounts for seasonal variations in energy use, ensuring an accurate estimate.

Analyze Consumption:

Look at the units or kilowatt-hours (kWh) consumed each month. Here's a sample breakdown of Mr. Kulkarni’s monthly consumption:

Calculate Solar Capacity:

Use the following formula to determine the required solar capacity:

For Mr. Kulkarni:

Note: In India, 1 kWp of solar power typically generates 4 kWh per day. This can vary based on factors such as location, sunlight hours, and weather conditions.

Importance of Using 12 Months

Considering a full year’s data is essential. Electricity usage spikes in summer due to air conditioning and drops in winter. Using an average prevents overestimating or underestimating your solar needs.

Step 2: Measure Available Roof Area

Next, determine if your roof has enough space for the required solar panels:

Measure Your Roof

Use a tape measure or refer to your building plans to find the roof area. Note any obstructions that might cast shadows on the panels.

Calculate Space Needed

Typically, 1 kW of solar requires 10 square meters (or 100 square feet). Newer, more efficient panels may require less space.

For Mr. Kulkarni’s 2 kWp system, he needs:

Since Mr. Kulkarni has 300 sq. ft. available, he has ample space for his solar panels.

Considerations

Ensure there are no obstructions like chimneys or antennae that could cast shadows on the panels, reducing their efficiency. Consider the orientation and tilt of the roof, as these factors influence solar power generation.

Step 3: Check Your Sanctioned Load

The sanctioned load is the maximum load approved by your electricity provider:

Find the Sanctioned Load

Look for this information on your electricity bill. It’s also known as the connected load.

Match Your Solar Capacity

Ensure your solar capacity does not exceed this sanctioned load.

Mr. Kulkarni’s sanctioned load is 2 kW, so his 2 kWp solar system is within limits.

If your roof area supports the required capacity but your sanctioned load is lower, you may need to request an upgrade from your electricity provider.

Comparing the Results

After completing the three steps, compare the results to determine the actual solar capacity needed:

Comparison

The lowest value from the three steps will be your final solar capacity. This ensures that your system is efficient and that you don’t over-invest.

Example Comparison

For Mr. Kulkarni:

  1. Average Electricity Bill: 2.083 kWp
  2. Available Roof Area: Can accommodate more than 2 kWp
  3. Sanctioned Load: 2 kW

The final solar capacity for Mr. Kulkarni’s house would be 2 kWp, based on the lowest value (sanctioned load).

Additional Considerations

Determining your solar capacity is just one part of the equation. Several other factors can influence the effectiveness and efficiency of your solar energy system. Here are some important considerations to keep in mind:

1. Solar Panel Efficiency

Solar panel efficiency refers to how well a panel can convert sunlight into usable electricity. Higher efficiency panels generate more power in a given area, which can be crucial if space is limited. Research and compare different types of panels, such as monocrystalline, polycrystalline, and thin-film, to find the best fit for your needs.

2. Geographic Location

Your geographic location significantly impacts the amount of solar energy you can harness. Regions closer to the equator typically receive more sunlight, making solar energy more viable. Utilize solar insolation maps or consult local solar energy experts to understand the solar potential in your area. Additionally, seasonal variations should be considered, as they affect sunlight availability.

3. Orientation and Tilt of Solar Panels

The direction and angle at which your solar panels are installed play a vital role in their performance. In India, for example, south-facing panels at an optimal tilt angle can maximize solar energy absorption. Adjustable mounts can help achieve the best orientation and tilt, adapting to seasonal changes for maximum efficiency.

4. Future Energy Needs

Consider any potential changes in your energy consumption. If you plan to purchase electric vehicles, add new appliances, or expand your home or business, your energy needs will increase. Incorporating these future needs into your initial solar capacity estimation can save costs on future upgrades.

5. Battery Storage Systems

Incorporating battery storage into your solar system can greatly enhance its effectiveness. Batteries store excess energy generated during sunny periods, providing power during the night or cloudy days. This not only ensures a continuous power supply but also maximizes the use of generated solar energy, reducing reliance on the grid.

6. Net Metering Policies

Check your local net metering policies, which allow you to feed excess solar energy back into the grid in exchange for credits. These credits can offset your electricity bills, providing additional savings. Understanding the regulations and benefits of net metering in your area can influence your decision on the size and design of your solar system.

7. Environmental and Aesthetic Considerations

Consider the environmental impact and aesthetics of your solar installation. Modern solar panels come in various designs that can blend with your roof or façade. Additionally, ensuring that your installation adheres to environmental standards and certifications can enhance your property’s value and appeal.

8. Maintenance and Durability

Solar panels require minimal maintenance, but it's important to understand the upkeep needed for optimal performance. Regular cleaning, monitoring for damage, and ensuring that no new shadows obstruct the panels are essential tasks. High-quality panels often come with warranties of 25 years or more, providing long-term reliability and peace of mind.

9. Financial Incentives and Rebates

Take advantage of government incentives, rebates, and tax credits designed to promote solar energy adoption. These financial benefits can significantly reduce the upfront cost of installing a solar system. Research the available programs in your area, such as subsidies, low-interest loans, and grants, to maximize your investment.

10. Professional Installation and Support

Finally, choosing a reputable solar installation company is crucial. Professional installers ensure that your system is correctly designed, installed, and maintained. They can also provide valuable advice on optimizing performance and navigating regulatory requirements.

Ready to Embrace Solar Energy?

Starting with the right size solar system is crucial for maximizing efficiency and savings. By using these two methods and considering additional factors, you can make an informed decision tailored to your specific needs. Contact us today to explore your solar potential and take the first step towards a sustainable future!

Blog

Our latest blogs

Residential

How to Integrate Aesthetic and Functional Aspects in Rooftop Solar Plant Design

A solar plant is definitely a money-saving and environment-friendly asset, but have you thought of integrating it with your building design?
Solar Installers

The Role of Software Tools in Solar Plant Design: An Overview

Designing a solar power plant may not necessarily require software, but one thing is for sure, anything that can be done through computers and its software makes the process quick and efficient. Just like......
Solar Installers

Maximizing Efficiency in Rooftop Solar Plant Design: Best Practices and Tips Understanding Orientation, Tilt, and Shadow Analysis

India is a tropical country blessed with abundant sunlight. So much so that nearly bout 5,000 trillion kWh per year of energy is incident over India’s land..
Businesses

Different types of solar installation models and why Capex is the best for MSMEs

While opting for solar, the type of financing model impacts various aspects, including project ownership, required investment, operations and maintenance, and expected returns for stakeholders. Therefore...
Anand Jain
Co-Founder & CEO
Businesses

How Aerem is Empowering MSMEs with Solar Adoption

Our all-encompassing solution guarantees a seamless transition to clean energy, facilitated by a fully digital and transparent process via...
Solar Installers

How Aerem is Empowering Solar EPCs With Comprehensive Solar Services

From offering collateral-free solar loans that make installations more accessible to providing a seamless procurement experience through SunStore, Aerem supports every aspect of your business. Our supply chain finance options ...
Businesses

10 Reasons for MSMEs to Install Rooftop Solar

adopting solar energy is not just an environmentally responsible choice; it is a strategic decision that can significantly benefit MSMEs in India. From reducing electricity bills and operational costs....
Businesses

Aerem Solar Loan: Everything You Need to Know

With Aerem Solar Loans, MSMEs, homeowners, and various other entities can overcome the financial barriers typically associated with solar installations. Our tailored financing solutions, strong industry partnerships,...
Businesses

5 Reasons to go for a Solar Loan

The most prominent barrier that we see among businesses is the availability of capital to install solar rooftop. But times have changed and with flexible solar loan or solar financing options ...
Businesses

How to evaluate solar rooftop EPC quotations

It's essential to select the right EPC Company with relevant experience. An experienced EPC Company has likely learned from previous installations, ensuring quality workmanship without unnecessary costs to you.
SolarTech

Your Rooftop Solar Glossary

Welcome to the Rooftop Solar Glossary, your ultimate resource for understanding the world of rooftop solar energy. Whether you're a homeowner, business owner, or solar enthusiast, our comprehensive glossary is designed to demystify the terminology and concepts related to rooftop solar installations.
SolarTech

How to make your Solar Rooftop plant Monsoon ready?

Do solar plants work in rainy seasons? This is a common question that people ask before installing solar. The answer to this is “Yes”...
Residential

Understanding Solar Loan Interest Rates: Reducing vs. Flat

Understanding the difference between flat and reducing interest rates can have a substantial impact on your financial decisions. By choosing the right ...
Businesses

Reducing Scope 2 Emissions Made Easy With Rooftops Solar

With the rising temperatures and effects of climate change, it has become more and more apparent for companies to measure and reduce their emissions. Reducing emissions...
SolarTech

Essential Guide: Understanding the Components of Your Solar Power Plant

The blog "Essential Guide: Understanding the Components of Your Solar Power Plant" provides a detailed overview of solar power plant components, emphasizing the importance of each part for optimal performance.
Businesses

Guide: How To Estimate Required Solar Installation Capacity?

The blog guides small business owners on estimating the solar capacity needed for their properties. It covers three steps: calculating average electricity usage, measuring available roof space, and checking the sanctioned load.
Businesses

Boost Solar Efficiency: Optimize PR & CUF for Peak Performance

Unlock the full potential of your solar installations with our expert guide on improving Performance Ratio (PR) and Capacity Utilization Factor (CUF). Discover actionable strategies for maximizing solar energy efficiency today.

Realise your solar potential with Aerem

We understand the unique challenges that India faces when it comes to adopting solar. Our platform is tailored to propel your business with the power of solar, setting the stage for unparalleled growth. Dive into tools, financing and SaaS systems that echo your ambitions