solar panel dimensions and size

Average Solar Panel Size,Weight and Dimensions

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What are the average sizes, weights, and dimensions of the solar panels? Are solar panels too big and Heavy for my roof?


Many homeowners are increasingly adopting solar energy systems across the United States. Without measuring a panel itself, it may not always be possible to estimate the size and weights of the panel.

This article aims to teach you the dimensions of an average solar panel, their weights, and if your roof has the strength necessary to support the solar panels.

How heavy are solar panels? How much do solar panels weigh in pounds and kilograms?


Residential Solar panels weigh 40 pounds each on average. Solar Panel Weight ranges between 33-50 pounds (15-23 kilograms), depending on the manufacturer. The sizes don’t vary much, and this is often an acceptable weight for your roof.

How large are solar panels on average? Solar panels Standard sizes


Most solar modules are 65 inches (5.4 feet) long by 39 inches (3.25 feet) wide. The actual size varies from one brand to another. Those that are intended for large-scale use, like municipal buildings or warehouses, can be 6 feet.

Each solar panel is made up of several solar photovoltaic cells. They are 156 mm (6 inches) long by 156 mm (6 inches) wide. Standard panels for rooftop installations comprise 60 constituent cells. Those for commercial facilities are 72 and can rise to 98 or more cells.

There is a direct correlation between the number of solar cells per panel and the length of the panel. The 72-cell commercial solar panels are usually 13 inches longer than the residential modules (60-cell).

A U.S solar panel system generates an average of 6 Kilowatts (kW). This means if you install a 6kW system that is made of 20 average solar panels, you will have to keep a space 72 feet wide and 13 feet long (a total of 352 square feet).

Measurements use based on the assumption that you place your panels very close to one another without obstructions.


Solar panel sizes and dimensions on a house

How many are necessary?


By now, you have already known the benefits of solar panels, including a reduced utility bill and carbon footprint, to mention a few! Additionally, you’re familiar with how solar energy systems work to power your home.

So you are wondering just how many panels are necessary for your home. Also, you are probably concerned about the space available at your home. Keep reading; we will look into everything we need to know regarding the size of the solar panels, the required quantity, and the kind of power production to expect.

Nationally, around 11,000 kWh of electricity is generated for use in homes annually. When broken down to 250kW solar panels, this translates to roughly 28-34 panels per household.


What is the most popular size for solar panels?

Standard residential panels are often 65 inches long by 39 inches wide and weigh around 40 pounds. Those for commercial installations are a little bigger, though, given the sheer sizes of commercial buildings. Residential ones are smaller and lighter, mostly due to their design and intent for household roofs. These homes cannot bear the heavier weights.


Each panel typically has 60 solar cells. They are the ones that convert solar energy into direct electrical currents. The photons which emanate from the sun react with the electrons which the solar cells release to produce the direct electric currents. An inverter, which forms part of the solar system, converts the direct current into alternating current. It is this one that can power your home’s electronic appliances.


Most panels are rated 230-275 Watts of power. When measured against the average yearly energy consumption and standard solar panel wattage, this comes to about 28-34 physical solar panels, which are installable in your home.


This is the number of panels you will need to generate sufficient power for your home. It is not the actual number of panels your home will need. This latter metric is also dependent on the size of your roof. To ascertain this, you will have to first and foremost determine how large your roof is.


The majority of solar panels measure 17.5 square feet. If yours is a roof that measures 385 square feet, you have the leeway to fit around 22 solar panels (385÷17.5).

Solar panel Sizes on average

What is the anticipated total energy production of my solar panels? Solar Panel Output:


Several factors determine the total energy production of your solar panels. The time of year and your precise place of residence are two of the most important determinants. If you live in a state that experiences higher sunshine rates like Arizona and California, your panels will be capable of generating more energy.


Time of year determines, to a great extent, the amount of energy the panels are likely to produce. Winter days experience limited sunshine, which in turn leads to reduced energy production. The exact opposite applies to the warm summer months.

The positioning of your home also has a role to play in all these. If yours is located in a shaded lot, your panels will generate less power compared to that one who resides right amid a wide-open treeless field. To make the most, you have to figure out the best position for your solar panel, the current landscape, the sloppiness of your roof, and the relative position of your home.

If you put up 22 solar panels at 256 Watts each incapacity, you will generate around 5.83kW of energy. This translates to a whopping 6,366 kWh annually. Just what does this portend dollar-wise? Based on the average rates of utility, you should expect to save a whopping $700 annually!


Multiply this figure by the total lifespan of the system, and you will appreciate why so many people have chosen to go solar. What’s more? Within a short five-year lifespan, you will be able to accrue 100% return on investments and no less than 20 plus years of money savings!

What is the impact of solar panel sizes? How does Photo-voltaic panel size (PV panel) affect your options?


If yours is a small or peculiarly shaped roof, you must consider the size of the solar panels and the overall quantity. If you have a large and unusable roof, you should disregard some efficiency and opt for a more extensive array of panels, which cost less per panel, to target your desired energy output.

If the usable area is small or partly shaded, picking fewer and smaller panels higher in efficacy is something you should consider. This approach may be the best way forward for ensuring the highest power output in the long term and better savings.


The dimensions of a residential solar panel at the moment are approximately 65 inches (5.4 feet) long by 39 inches (3.25 feet) wide on average. Different manufacturers vary their prices depending on what is needed. An example would be SunPower’s panels that measure 61.3 inches long by 41.2 inches wide.


The efficacy and outputs of the panels have significantly changed for the better. Moreover, SunPower, for example, designs its whole system to contain almost no gaps in between. They use invisible framing and mounting hardware to maintain the rooftop look as compelling and elegant as they can!


Getting to know the answers to the questions above will give you a rough idea of just how many panels you might need for your electricity generation. If that cannot happen, then you will get to settle for a specific range.


A professional installer will have to ascertain the unique architecture of your roof. This is followed by the angle of the sun and other relevant factors. All these pieces of information are necessary to determine how you will physically arrange the panels you have on your roof. All these combine to decide on your daily energy production needs.


Net metering could be useful, given that you want to understand the returns on investment for your solar system. Net metering refers to how your utility company credits you for generating excess solar energy whenever their sunshine is abundant; after that gives you the leeway to withdraw from those credits while using the power grid at night, only if you have a solar battery system.

Beautiful solar panels on a house roof showing size

How many hours of sunshine should I expect in my area?


Your specific location’s peak sunlight hours significantly impact the energy that your home’s solar system is likely to produce. For instance, if you reside in Phoenix, you should anticipate higher peak sunlight hours than if you live in Seattle. This does not imply that those who stay in Seattle cannot install solar panels. On the contrary, they would need an additional number of panels.


The renewable resource data center computes and furnishes information about sunlight per state and for most leading cities. To find your unique sunlight requirements, multiply your hourly usage by 1,000 to convert it to watts. Divide your average hourly wattage requirement by your area’s daily peak sunlight hours.


This quotient is indicative of the number of solar panels that may be necessary to produce power each hour. To create the U.S. average of 900kWh/monthly in those areas which receive five peak sunlight hours daily requires 6,250 Watts.


Is it possible for my roof to support a solar panel system?


Using the knowledge you have gained about the solar panel sizes and weights, you may now go ahead to calculate the weight of a solar panel system. This, in turn, helps you know if your roof indeed is capable of supporting a solar panel system or not.

In the case of a 6kW solar installation, which constitutes 20 solar panels, you are talking about 800 pounds (20 panels by 40 pounds) heavy. Based on our calculations above, the system measures around 352 square feet, translating to an average weight of about 2.3 pounds per square foot (800 pounds ÷ 352 square feet).

By incorporating the mounting hardware and other pieces of equipment for the panels, you get a combined weight of approximately 3-4 pounds per square foot.


The roofs atop most new homes are capable of handling over 3 pounds per square foot of weight. If yours is an older roof, though, you should be wary of its ability to accommodate the weight of solar panels. For this, you should talk with roofing companies or solar providers.


A roof inspection reveals the necessary support and advice on if the weight of the solar panels may be too much for your homes or not.


Solar panels do not vary a lot in size and weights

Although solar panels vary in maximum power output, efficacy, and temperature co-efficient, their relative sizes and weight are the same for the most part. Solar panels are 17-23 square feet and weigh somewhere around 40-50 pounds. We do hope that our list will give you the insight you need to determine the solar panel to choose to install.