Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial

Stand-Alone Photovoltaic Systems

In the video “Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial” by Renewable Energy, you will learn everything you need to know about designing a stand-alone photovoltaic system connected to batteries. With massive solar power being received by our planet, imagine the potential to generate 10,000 times more energy than what the entire population currently utilizes!

By the end of this video, you will have a clear understanding of how to assign a suitable battery rating based on the load curve and expected PV power using MATLAB software. If you’re interested in this subject, simply comment with ‘Interested’ and connect with possible cooperators from the research or industry sector. Don’t forget to subscribe, like, and share the video to support this channel and stay updated on more forthcoming videos.

Hello everyone! In this video, you will discover how to design a standalone photovoltaic system interconnected to batteries in just one minute. The power system involves photovoltaics that convert sun irradiance to DC power, with an inverter used to convert from DC to AC at the load terminal.

Through this tutorial, you will also become familiar with selecting a suitable battery rating, understanding the arrangement of PV panels, and how to use MATLAB software to adjust load profiles, MPPT parameters, and show results. The design parameters of the system are automatically printed, making this an essential tool for researchers, engineers, and even consumers.

So join us in exploring the world of stand-alone solar systems and remember to comment with your feedback and experiences on this topic. Finally, don’t forget to subscribe and like the video to support our channel.

How to Size Stand-Alone Photovoltaic Systems

Stand-alone photovoltaic systems are an excellent solution for generating renewable energy in locations that are not connected to the electrical grid. Unlike grid-tied systems, which rely on the grid for backup power, stand-alone systems operate independently and store excess energy in batteries.

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In this article, we will walk you through the process of sizing a stand-alone photovoltaic system, using MATLAB software for system design and simulation. We will also discuss the importance of assigning a suitable battery rating and provide information on how to connect with possible cooperators in research or industry.

Introduction to Stand-Alone Solar Systems

Before we dive into the details of sizing a stand-alone photovoltaic system, let’s first understand what these systems are and why they are important. Stand-alone solar systems, also known as off-grid systems, are designed to generate and store solar energy without the need for a connection to the electrical grid.

They are commonly used in remote areas, cabins, boats, and RVs, where access to the grid is either unavailable or impractical.

The Earth receives an enormous amount of solar power, equivalent to 173,000 terawatts. If we were able to harness all of this energy, we could generate 10,000 times more power than the entire population of the planet currently consumes. This immense potential makes solar energy a promising solution for meeting our energy needs in a sustainable manner.

Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial

Sizing Stand-Alone Photovoltaic Systems

Sizing a stand-alone photovoltaic system involves determining the power requirements, calculating the load curve and expected PV power, and assessing the battery capacity needed. Let’s take a closer look at each of these steps.

To begin, you need to determine the power requirements of your system. This includes identifying the appliances and devices that will be powered by the system and estimating their power consumption. By understanding the energy needs of your system, you can accurately size the components to meet those demands.

Next, you’ll need to calculate the load curve and expected PV power. The load curve represents the variation in power consumption throughout the day, including peak and off-peak periods. Solar panels generate different amounts of power depending on factors like sunlight intensity and angle of incidence.

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By analyzing the load curve and expected PV power, you can determine the capacity and arrangement of the solar panels needed to meet your energy demands.

Once you have determined the load curve and expected PV power, you can assess the battery capacity needed to store excess energy and provide power during periods of low or no sunlight. Factors such as desired autonomy (the number of consecutive days the system can operate without charging), battery efficiency, and depth of discharge should be considered when selecting an appropriate battery rating.

Using MATLAB for System Design

MATLAB software provides a powerful platform for designing and simulating stand-alone photovoltaic systems. Its intuitive interface and extensive library of tools make it an ideal choice for engineers, researchers, and even basic consumers.

To access the provided MATLAB code for system design, you can refer to the description of the video or any accompanying resources. The code allows you to represent the power system using MATLAB Simulink, which includes components such as photovoltaic panels, inverters, and AC loads.

You can customize parameters such as load profile, MPPT (Maximum Power Point Tracking) settings, and system efficiency to simulate different operating conditions.

Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial

Assigning Suitable Battery Rating

Assigning a suitable battery rating is a crucial step in designing a stand-alone photovoltaic system. The battery rating determines the capacity of the battery and, consequently, the amount of energy that can be stored. It is essential to consider several factors when determining the battery capacity.

Firstly, you need to assess the load curve and expected PV power to estimate the energy requirements of your system. A higher load curve and expected PV power will generally require a larger battery capacity. Additionally, factors such as the desired autonomy, battery efficiency, and depth of discharge will influence the battery rating.

By accurately sizing the battery for your system, you can ensure a reliable and efficient power supply, even during periods of low or no sunlight.

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Simulating Stand-Alone Photovoltaic System

Simulating a stand-alone photovoltaic system using MATLAB Simulink provides valuable insights into system performance and helps optimize its design. By running the provided code, you can monitor and analyze system parameters in real-time, such as solar irradiance, active and reactive load power, and operational modes of PV generation and battery charging.

The simulation tool allows you to experiment with various settings and configurations to find the most efficient and cost-effective solution for your energy needs. By fine-tuning parameters and analyzing the results, you can optimize energy generation and storage, ensuring maximum use of available resources.

Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial

Collaboration Opportunities

If you are interested in stand-alone photovoltaic systems and would like to connect with possible cooperators in research or industry, we encourage you to mention your interest in the comments. By expressing your interest, you will have the opportunity to receive the provided code with further descriptions and assistance.

Collaboration is essential in advancing renewable energy technologies and finding innovative solutions. By sharing experiences, exchanging feedback, and supporting one another, we can accelerate the transition to a cleaner and more sustainable energy future.


Designing and sizing stand-alone photovoltaic systems is a complex but rewarding process. By accurately determining power requirements, calculating the load curve and expected PV power, and assigning a suitable battery rating, you can develop a reliable and efficient system. MATLAB software and its Simulink simulation tool provide valuable resources for system design and optimization.

If you are interested in stand-alone photovoltaic systems, we encourage you to explore further resources, connect with like-minded individuals and professionals, and continue your journey towards a sustainable energy future. Remember to subscribe, like, and share to support this channel and stay updated with future content.

Sizing Stand-Alone Photovoltaic Systems: A MATLAB Tutorial