What Are the Advantages of High Efficiency 72 Cell Solar Panel Manufacturing？

60-cell and 72-cell panels can be used in rooftop installations, ground mounts, carports, and more. That being said, 60-cell solar panels are much more common for residential solar installations, while 72-cell solar panels are more commonly used for commercial or other large-scale projects. There are a few key differences between the two that will impact which option you choose, regardless of whether you're installing for your home or business.

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Dimensions

72-cell solar panels have more photovoltaic cells, therefore, they are larger than 60-cell panels. When it comes to dimensions, 60-cell panels are usually built six cells wide and ten cells tall. 72-cell panels are also six cells wide but have an additional two rows of cells that make them a bit taller. What does this translate to in feet and inches? 60-cell solar panels have an average dimension of roughly 5.4 ft by 3.25 ft. 72-cell panels will roughly be the same width and average around 6.5 ft in height.

This extra space can make a big difference when it comes to your solar system design. If you have plenty of uninterrupted roof space or a lot of land for a ground-mounted installation, you can likely go with 60 or 70-cell panels. But, if you're going to have limited space for installation or a more complicated layout (such as a lone panel on a dormer or a small garage to fit a few panels), most installers are going to recommend 60-cell panels. Because they're smaller, they'll be able to fit in more tight spaces that may not work for a 72-cell panel. The same is true for roofs that are narrow - if your local jurisdiction or fire department has strict setback codes for solar arrays, 60-cell panels may also be the better option because they are shorter. A lot will depend on the specifics of your roof and your preferences for the layout of your array, so it's a good idea to talk to an installer about your options.

Cost of installing

The cost of installing 60-cell vs. 72-cell panels may also vary a bit for your installation. 72-cell solar panels tend to be cheaper to install on a large scale, which is why they're more common for commercial applications. Because each panel has more solar cells, you can typically install fewer panels to generate the same amount of electricity. Fewer panels mean less racking is necessary, which helps cut down on overall equipment and installation costs.

On the other hand, 60-cell panels are lighter and easier to install, which is why they're more common for residential rooftop installations. This can mean lower labor costs for the installation. For large commercial installations, the extra size and weight of a 72-cell panel aren't as much of an obstacle because cranes are often used to lift the equipment to the rooftop.

Wattage and power output

72-cell panels can have higher wattages and power output than 60-cell panels because of the additional photovoltaic cells, but that's not always the case. In fact, the number of cells in a panel doesn't have a direct correlation to its power output. The power output of a panel is more dependent on the quality and durability of the solar cells themselves.

Let's look at Axitec's AC-310P/156-72S as an example. This is a 310-watt (W) solar panel that has 72 cells. Despite having more photovoltaic cells, the panel has a lower power output than LG's LG325N1C-A5, which is a 60-cell 325W panel.

That being said, if you're looking for the highest wattage panels possible, you do often have to look towards panels with highly efficient solar cells and higher cell counts. Examples of this include LG's LG405N2W-A5, which is a 405W panel with 72 photovoltaic cells. 60-cell panels will rarely get up to 400W (though some can get up to 350W or more)

When it comes down to choosing your solar panels, the number of cells included in the panel isn't the most important factor. Cost, aesthetics, warranty, efficiency, and durability should all be taken into account when selecting the right solar panels for your home or business.

For cost, it's a good idea to compare your 60-cell and 72-cell panel options on a cost-per-watt ($/W) basis. Similar to looking at dollars per square foot when shopping for a home, looking at $/W shows you what the cost of a turnkey solar panel installation is on a per-watt basis. Looking at this factor will allow you to standardize the price of installations using either 60-cell or 72-cell panels, especially if you're comparing different system sizes.

Panels come in a variety of cell colors (dark blue, blue, black), back sheet colors (white, black), and frame colors (silver, black, and white). If aesthetics are a concern, make sure to look at an image of the panel before signing the contract, or ask your installer for photos of their past installations with the same equipment to get a feel for how they will look on your roof. If you're looking for the sleekest appearance possible, there are many black-on-black panel options. You may pay more for these options, but it can be worth it.

For comparing the warranty, efficiency, and durability of one solar panel versus another, you can use EnergySage's Solar Panel Ratings. Panels are independently rated on a scale based on their specifications and warranty offerings from the manufacturer.

The summary: 72-cell is about a foot taller, and they cost a bit less to mount in large-scale applications. However, both 60-cell and 72-cell solar modules use the same cell technology, and they work out to the same price from a cost-per-watt perspective. Either option can be used in residential or commercial installs &#; the ideal choice depends on your array layout and space constraints where you will mount your system.

But when it comes down to choosing your solar modules, the number of cells included in the panel isn&#;t the most important factor. Cost, aesthetics, warranty, efficiency, and durability should all be taken into account when selecting the right PV panels. In this article, we&#;ll discuss some differences between 60-cell solar panels and 72-cell solar panels as well as their pros and cons.

Solar modules are made from blocks of silicon ingots that are cut into wafers. Those are the squares that you see that make up the modules.

Each solar cell (monocrystalline) produces about 0.55 volt. Multiple cells are wired in series, plus to minus, to make a solar module. Wiring the cells in series increases the PV panel voltage to a usable level. The more cells that are wired in series, the higher the voltage.

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For example, if 36 cells are wired in series, you get an output of about 19.8 volts. Remember that solar first got its start in the battery-based off-grid world, where PV panels were built to charge battery banks. The 36-cell solar panel that output 19.8V is perfect for charging a 12-volt battery bank. Since you need a higher voltage to charge a battery, a 36-cell solar panel is called a 12-volt nominal panel, it&#;s designed to charge a 12-volt battery.

Likewise, a solar panel with twice as many cells, 72 cells, outputs about 39.6 volts. And it&#;s great for charging a 24-volt battery bank. So it&#;s called a 24-volt nominal solar panel.

The first was grid-tied solar with a grid-tie inverter, you could now convert the DC voltage from the PV panels directly into AC to power your properties, no batteries required. So the restriction of 12V or 24V and 48V went away. This allows solar panel manufacturers to use however many cells they want to.

Today for solar modules up to above 320 watts, the industry settled on 60 cells. Using terminology from the battery world, that&#;s a 20V nominal panel. With an Open Circuit Voltage or Voc of around 41 volts. Grid-tied solar systems are able to string up to 20 pieces (/41/1.21=20) of 60-cell solar panels in series and stay within the electrical code restriction of staying under VDC, even when considering the cold temperature. If they were using 24V 72-cell solar panels, they would be limited to only 16 pieces (/49.5/1.21=16) in series in cold environments.

The second change was still in the battery based world, with solar charge controllers that are used to manage to put the power from the PV panels into the batteries. Early on, the pulse width modulated (PWM) charge controllers had to match the nominal voltage between the photovoltaic panels and the battery bank. Maximum power point tracking (MPPT) solar charge controllers came onto the scene and allow you to take a higher voltage input and reduce the charge controller voltage output to correctly charge a battery bank while increasing the output current, eliminating any power loss due to forcing PV panels to operate at whatever voltage the battery bank was actually at.

This opened up the possibility to use any cell count solar modules, as long as the voltage was higher than the battery bank. Although some specialized charge controllers allow you to charge with a lower voltage solar panel, most of them require a higher voltage.

Since 60-cell &#;grid-tie&#; solar panels are so common now, their price per watt has dropped much lower than the standard 12V nominal panels, making them an attractive option to charge battery banks. Just remember, you have to use a more expensive MPPT charge controller to do it.

Also, note that you cannot use a single 60-cell solar panel to charge a 24V battery bank. You need at least 1 72-cell solar panel or 2 60-cell panels in series to have a voltage high enough to charge 24V. If you&#;re in a cold environment, most 150V MPPT solar charge controllers limit you up to only 2 72-cell panels in series, but you can do up to 3 6-cell panels in series and still stay within that 150-volt limitation.

So, what about the 72-cell 24-volt solar modules for grid-tied systems? Well, technology and codes move forward, and newer revision of the electric codes now allow for volts strings for grid-tie commercial and utility-scale systems.

Also, grid-tie inverters are getting bigger and bigger, allowing for extremely high wattages is getting inverted. Since watts equals volts times amps, a way to increase the wattage of a solar panel is to increase the voltage by adding additional cells.

The cost of installing 60-cell vs. 72-cell panels may also vary a bit for your installation. 72-cell solar panels tend to be cheaper to install on a large scale, which is why they&#;re more common for commercial applications. Because each panel has more solar cells, you can typically install fewer panels to generate the same amount of electricity. Fewer panels mean less racking is necessary, which helps cut down on overall equipment and installation costs.

On the other hand, 60-cell panels are lighter and easier to install which is why they&#;re more common for residential rooftop installations. This can mean lower labor costs for the installation. For large, commercial installations, the extra size and weight of a 72-cell panel aren&#;t as much of an obstacle because cranes are often used to lift the equipment to the rooftop.

There&#;s one scenario where 72-cell solar panels are less common. This exception comes when you build a solar system around micro-inverters.

Micro-inverters work on a 1-to-1/2/4 system, where each inverter is hooked up to an individual PV panel(or 2 panels, sometimes 4 panels). The benefit of this type of system is that it is modular: if one part stops working, it doesn&#;t affect the rest of your array. This makes it easy to repair and expand your system.

For the cost, it&#;s a good idea to compare your 60-cell and 72-cell panel options on a cost-per-watt ($/W) basis. Similar to looking at dollars per square foot when shopping for a home, looking at $/W shows you what the cost of a turnkey solar panel installation is on a per-watt basis. Looking at this factor will allow you to standardize the price of installations using either 60-cell and 72-cell panels, especially if you&#;re comparing different system sizes.

PV panels come in a variety of cell colors (dark blue, blue, black), cell shapes (pseudo square, full square), backsheet colors (white, black) and frame colors (silver, black). If aesthetics are a concern, make sure to look at an image of the panel before signing the contract, or ask your installer for photos of their past installations with the same equipment to get a feel for how they will look on your roof. If you&#;re looking for the sleekest appearance possible, there are many black-on-black panel options. You may pay more for these options, but it can be worth it.

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