Solar Panel Size Guide
June 15, 2023
You’ll save money with solar power regardless, but you want to ensure you save the most money possible! The size of solar panels — along with their brand, material and wattage — certainly plays a role.
So, what size are solar panels? The answer’s fairly straightforward, but the implications are a bit complex.
Let’s get into the basics, look at what you’ll want to consider and check out average solar panel sizes.
[Related: What To Know Before Installing Solar Panels]
The Basics: What Size Are Solar Panels?
Here are the fundamentals.
Finally, here are the average solar panel sizes:
- Residential 60-cell panel = 39 inches by 65 inches
- Residential or commercial 72-cell panel = 39 inches by 78 inches
- Commercial 96-cell panel = 41.5 inches by 63 inches
At the core, the size of solar panels depends on whether you’re installing panels on a home or business.
Nonetheless, that’s the first of many factors. The other most important are your panels’ brand (e.g., SunPower) and material (i.e., monocrystalline silicon, polycrystalline silicon or thin film).
Your necessary solar panel size also depends on your roof’s area and how much power you use daily. Other facts — like where you place panels and how much sunlight your property sees — contribute as well.
[Related: The Best Roof for Solar Panels: A Guide]
Solar Panel Size Chart
Let’s summarize with a solar panel size chart. We’ve included a few more details, so you’ll have key info together. The data is average for solar panels on most U.S. homes and businesses.
|Average Dimensions/Data||Residential||Residential orCommercial||Commercial|
|Solar cells (No.)||60||72||96|
|Solar cell size (in.)||6 x 6||6 x 6||6 x 6|
|Area (sq. ft)||17.62||21.13||17.5-26.0|
|Energy produced (W, range)||270-440||270-440||315-550+|
Note: This data is courtesy of solar panel company Freedom Solar, SunPower, EnergySage and Forbes. Dimensions and measurements vary by manufacturer, and 96-cell solar panel dimensions tend to vary more than those of 60- and 72-cell panels.
Please remember that you’ll find outliers, from small portable panels to 128-cell industrial panels. Brand and material also may alter the exact numbers, especially in terms of solar panel sizes and wattage.
[Related: Solar Panel Placement: A Handy Guide]
Selecting the Right Solar Panel Size
Keep in mind that most people don’t set out to find the perfect solar panel size.
Instead, they find a solar panel brand and solar power installers that they trust. Then, that installer recommends the best panels for their needs based on the available offerings — as well as how many total solar panels will be necessary to cover their energy requirements.
But in case you’d like to take size into account, here are matters to mull over.
Finding Solar Panel Sizes
To begin, ask yourself a few questions.
- Are you equipping a home or business?
- How much power do you need?
- Note: Solar panel sizes and wattage produced vary, particularly per panel manufacturer.
- How much room does your roof have, and would solar panels suit it?
- What brand and material are your solar panels?
- How much sunlight does your property see?
Remember that your solar panel size will affect your energy output and number of required panels. In a nutshell, here’s how to calculate the number of panels you need:
Hourly energy needs ✕ Area’s peak sunlight hours ➗ Panel W
Now, finding your property’s hourly energy requirements, peak sun hours and necessary wattage is tiring. At the risk of repeating ourselves, it’s smart to speak with energy consultants — they can get down to brass tacks.
But to circle back, you usually see 39-inch by 65-inch or 39-inch by 78-inch solar panels on a home solar installation. You frequently spot 39-inch by 78-inch or 41.5-inch by 63-inch solar panels on a commercial solar installation. You occasionally see large 96-cell panels on homes, but most simply don’t have the roof space.
A Note on Solar Panel Sizes and Wattage
We know wattage is important when it comes to what solar panel size you need. If your property consumes many kilowatt-hours (kWh), you’ll need more small to mid-sized panels or fewer large panels.
Knowing how many kWh your property needs goes a long way. For one, it helps energy consultants determine your ideal solar panels’ size and number. Then, you can discuss your roof, local weather conditions and more.
[Related: How Do Solar Panels Work?]
Contact Freedom Solar for Solar Panel Size Guidance and Painstaking Installation
Selecting solar panel sizes can mean wading through data, especially considering the number of options and influential factors.
At solar panel company Freedom Solar, we’re happy to walk you through it (and do the calculations). We’re an authorized SunPower Master Dealer, which means you get only the best when you work with us. See how much you can save today.