How Big Are Solar Panels?

How Big Are Solar Panels, Typical sizes of residential, commercial, and half-cell panels

One of the biggest factors to consider when it comes to solar power is maximizing your roof space. And for that, you’d also have to know the dimensions of PV panels. So, how big are solar panels, actually?

On average, residential solar panels are 1.6m tall and 1m wide. You have more options, though, as different manufacturers each have their take.

That being said, this post explores…

What sizes do solar panels come in?

Solar panels come in a variety of sizes but, to simplify everything, we’ve categorized them into 3 groups:

  • Residential,
  • Commercial, and
  • Half-cell

Let’s talk about each one.

image comparing the sizes, wattages, and solar cells or residential, commercial, and half-cell solar panels. This answers the question: How big are solar panels?
A visual representation showcasing the contrasting sizes, wattages, and solar cell configurations of residential, commercial, and half-cell solar panels, providing insights into their dimensions.

Get 3 Solar Quotes From Quality Local Installers.

Residential Solar Panels

The average residential solar panel dimensions are approximately 1.7m x 1m. Depending on the specific model and type, they typically have 60 solar cells and range from 250 to 400 watts.

Commercial Solar Panels

Generally, commercial solar panels have around 60 to 72 cells and measure approximately 2.1m x 1m. Also, the average wattage of these commercial panels ranges from 350 to 400.

Half-cell Solar Panels

Half-cell solar panels are used in both residential and commercial applications. On average, half-cell panels range from 120-144 cells with 520 to 550W. These solar panel dimensions vary greatly but a safe approximation would be 1.9m x 1m.

What are the factors that determine solar panel size?

The size of a solar panel depends on a few key factors, including:

  • The type of solar panel,
  • The desired wattage of the solar panel, and
  • The materials used to make the solar panel

Solar Panel type

table comparing the efficiencies of monocrystalline, polycrystalline, and thin-film solar panels
A Side-by-Side Comparison of the Efficiency Ratings for Monocrystalline, Polycrystalline, and Thin-Film Solar Panels

Different types of solar panels have different efficiencies. So, the size of the system needed to generate the desired power depends on the type of solar panel used.

For example, polycrystalline solar panels may need more solar cells than that monocrystalline solar panels to generate the same amount of power.

Solar panel wattage

Let’s use residential solar panels as an example here. As a group, they produce anywhere between 250-400 watts. However, solar panels that are on the larger end are typically the ones capable of producing higher outputs.

Although, it’s also important to note that efficient panels can be smaller but still produce more electricity. This brings us to the next factor.

Solar panel materials

Different materials can harness sunlight under different efficiencies. Moreover, they can also affect the rate at which the panels degrade over time.

The better the materials used, the more durable and efficient the panels become. Naturally, this affects the size and weight of the panels, too.

Speaking of weight…

Get 3 Solar Quotes From Quality Local Installers.

How heavy are solar panels?

table showing the dimensions and weight of the top solar panels in Australia.
A Comparison Table of Dimensions and Weight for the Leading Solar Panels in Australia

Most residential solar panels weigh between 40-50 pounds. However, like their dimensions, the weight of these panels depends on their size, type, and material.

How much roof space is needed for a solar system?

Well, that depends entirely on what you want from your solar system.

A larger system would need more roof space. A less efficient solar panel system would also need more roof space to produce the same power.

To give you an example, a 5 kW residential solar system would need anywhere between 30-35 square meters. Though, again, you could need less space if your system was more efficient.

That being said, I recommend consulting a trustworthy installer. Should you need help finding one, we have a network of pre-vetted installers at the ready. We can get you 3 FREE quotes, too.

What are the factors that affect solar panel output?

Solar panel structure

The size, shape, and materials used to construct the panel can all play a role in how efficiently it converts sunlight into usable energy. They also affect the panel’s ability to shed rain and dirt.

Additionally, the angle of the panel in relation to the sun and how much direct sunlight it receives can also affect the output of the panel.

Recommended: What direction solar panels should face in Australia

Solar panel size

Generally speaking, larger solar panels produce more electricity because their larger surface area captures more sunlight.

However, this isn’t always true as there are also smaller panels that make up for their size with higher efficiency.

Solar Irradiance

According to NASA, solar irradiance is “the output of light energy” from the sun measured here on Earth. For you, this should mean that higher irradiance also means higher output from your solar system.

Local Climate

The more direct sunlight that a solar panel is exposed to, the more power it can produce.

That being said, it’s also important to note that hotter areas can reduce the efficiency of your solar system. This is true for all other electronics, too.

Therefore, the best climate is where you’re getting a lot of sun without it being too hot.


Does Size Matter When It Comes To Solar Panels?

Yes, size can be an important factor when it comes to solar panels. Generally, larger solar panels allow for more sunlight to be collected which can help to generate more power. However, there are also smaller solar panels that can be as effective as larger ones due to higher efficiencies.

What Is The Ideal Size For Solar Panels?

The ideal size for solar panels depends on your energy needs and your available roof space. There is no one size fits all approach here, hence the many choices from different manufacturers.

How Many Solar Panels Should I Install On My Roof?

How many panels you install on your roof depends on your energy requirements and budget. The larger your solar system, the less you have to rely on the grid. As of right now, though, the most popular residential installations are upwards of 6.6kW systems.


Solar panels come in a variety of sizes, from small panels that can power a single appliance to large arrays that can power an entire home or business.

The size of the solar panel you need depends on several factors, including how much electricity you want to generate and your available space. Finally, if you’re planning to install a solar system for your home, we have a network of pre-vetted installers and we’re ready to get you 3 FREE quotes.