At Maine Solar Solutions, we are dedicated to providing you with insights into solar technology, as well as the diverse solar panel options available on the market.
When you consider installing a solar electric system for your residence or business, we will start with a comprehensive examination of your property. The data collected during your complimentary solar site assessment will allow us to suggest various system designs tailored to your needs.
These proposed designs will showcase several solar panel brands. At Maine Solar Solutions, we proudly work with industry-leading solar panel manufacturers, such as Silfab, Q-Cell, LG, Panasonic, and Solaria, among others.
We provide a diverse selection of solar panels, enabling our customers to select options based on aesthetics, efficiency, manufacturing origin, and overall value.
This variety in our offerings means the panels may differ in size. The two prevalent sizes are large format panels, measuring approximately 40” x 80”, known as 72 cell panels, and standard format panels, measuring about 40” x 66”, known as 60 cell panels.
Traditionally, 72 cell solar panels have been associated with commercial applications, while 60 cell panels are generally favored for residential use.
On residential rooftops, where aesthetics often influence purchasing decisions, there is a greater preference for 60 cell solar panels, which frequently come in all-black or black-framed designs, making them particularly appealing in the residential market.
The key distinction between a 60 cell and a 72 cell panel lies in their size; 72 cell panels are approximately 12” longer and contain 12 additional solar cells compared to their 60 cell counterparts. This configuration often translates to better value per watt for 72 cell panels.
By including 72 cell panels in our offerings, Maine Solar Solutions enhances value for both residential and commercial clients.
Both 60 cell and 72 cell solar panels are commonly installed on sloped rooftops, as well as on ground-mounted solar arrays for both residential and commercial structures.
Solar panel manufacturers supply precise mounting guidelines to ensure load ratings are met, whether the installation is on a pitched roof or an open-backed ground-mounted system.
All manufacturers we partner with comply with the UL design load rating of 30 lb/ft2 and an IE Pa load rating (pa= 88 lb/ft2). It’s essential to highlight that all solar panels installed within the United States must adhere to these load ratings.
The choice between 72 cell and 60 cell panels ultimately rests with you. Both options are robust and safe for residential and commercial properties.
Are you ready to make the switch to solar energy? Reach out to Maine Solar Solutions for a quote and more information on our solar panels!
A Historical Perspective
Solar panels consist of individual solar cells connected in series. A panel’s area and wattage increase with the number of cells it contains.
While it’s feasible to produce panels with varying cell counts, those seeking solar solutions will encounter primarily two options.
While larger panels may seem advantageous, the nuances of solar energy installations reveal a more intricate picture.
Ultimately, the total wattage of the entire solar system is crucial, not merely the output from individual panels. Although it’s true that employing fewer large panels as opposed to multiple smaller ones can provide the same wattage, there are numerous reasons why 60-cell panels often make more financial sense for residential and many commercial solar applications.
Interestingly, even though 72-cell panels have existed since the initiation of the industry, 60-cell panels emerged as a recent innovation in the market.
This shift in the solar industry stimulated demand for smaller panels, enabling residential and smaller commercial solar systems to deliver energy at a lower cost compared to utility companies.
Addressing Storage Challenges
The principal obstacle faced by solar energy is the dependency on sunlight, which doesn’t align with our energy consumption patterns. Homeowners typically use the most power during evenings when sunlight is insufficient for energy generation.
Additionally, even at night—when there is no sunlight—the energy required to keep appliances running must be accounted for.
Energy consumption often peaks when sunlight is brightest, typically during hours when homeowners are not present, further complicating the reliance on solar power.
Consequently, finding a way to store energy produced during peak sunlight hours for later use is vital for the practicality of solar systems.
Initial Solution: Batteries
In the early days of solar technology, batteries represented the primary solution. Much of the industry’s focus during that time revolved around these storage units.
For more information on 72 Cells Solar Panel Solution, please contact us for professional insights.
Understanding early panel sizes is straightforward: for any specific battery voltage, an optimal higher voltage exists for efficient charging. Charging systems below this optimal voltage lose efficiency, while those above yield no additional benefits.
A single (monocrystalline) solar cell generates approximately 0.55 volts, meaning a 72-cell panel produces around 39.6 volts—ideal for charging a 24-volt battery. Conversely, a 36-cell panel produces 19.8 volts, suitable for a 12-volt battery.
Initially, with batteries available only in 12 or 24-volt configurations, the industry saw strong demand for 36 and 72-cell panels due to this essential connection between panel size and battery compatibility.
However, as solar installations grew connected to the grid, this paradigm shifted, allowing for excess energy generated during the day to be utilized by local utility companies.
Net Metering Developments
Numerous states, including Pennsylvania, adopted net metering laws mandating utility companies reimburse homeowners at market rates for excess solar energy returned to the grid.
This framework made it possible for surplus solar energy to be stored for later use without needing batteries, thereby removing restrictions on panel size previously imposed by storage capacity.
Consequently, 72-cell panels remain standard for large-scale installations where fewer panels can be utilized. The substantial machinery involved minimizes added labor costs associated with larger projects.
Advantages of 60-Cell Panels
Yet the larger dimensions of 72-cell panels create significant challenges for residential installations and many commercial projects that aren’t substantially larger in scale.
Typically, 60-cell panels measure around 66” x 40” and weigh up to 40 pounds. In contrast, 72-cell panels, while similar in width, are about a foot longer and weigh around 48 pounds.
While these weight differences might appear marginal, they become considerable when teams are tasked with moving, positioning, and installing panels—especially at heights.
The 72-cell panels may be too lengthy for individuals to handle easily, particularly when lifted to a rooftop, translating into increased labor intensity and costs.
One significant challenge in designing solar installations is optimizing output to meet the homeowner's needs. Given that roof space is limited, the design flexibility offered by smaller 60-cell panels can be an immense advantage. This is especially pertinent considering many regions have fire access regulations that further constrain panel layout.
Utilizing 60-cell panels over 72-cell options often allows enough room to include an additional row or more, leading to an expanded system that can adequately meet the energy needs of a household.
Logistically, companies face challenges with the non-standard pallets required for 60-cell panels that have become industry-standard. Yet, the complications escalate with 72-cell panels, which necessitate larger, unwieldy pallets for transport.
Pallets measuring 78” long become impractical for truck transport, making it notably difficult to maneuver and balance such sizes efficiently.
Conclusion: The Case for 60-Cell Panels
The advent of grid-connected solar installations eliminated the limitations on panel size driven by battery compatibility.
The size of individual panels becomes secondary compared to achieving optimal energy production through the system as a whole.
In light of this, 60-cell panels have rapidly gained favor as the industry standard for residential and most commercial solar installations due to their labor-saving and transportation advantages, as well as their superior design adaptability.
Interested in learning more about us as a 72 Cell Solar Module Manufacturer? Don't hesitate to get in touch.
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