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10 Myths About Solar Energy You Should Know Before Installing Panels

Solar photovoltaic energy has become one of the most promising solutions for reducing electricity bills, achieving energy independence, and protecting against rising energy prices. More and more homes, businesses, homeowners’ associations, hotels, industrial facilities, and farms are considering installing solar panels to generate part of the electricity they consume.

But along with the growth of self-consumption, many myths, incomplete comparisons, and overly simplified messages have also emerged. And this is a problem, because a photovoltaic system is not an impulse purchase or a product that should be chosen based solely on price. A solar system is an energy investment that will be part of your home or business for many years to come.

At Ubora, we get asked very similar questions every day: “Are all solar panels the same?”, “Why is one quote cheaper than another?”, “Does the warranty really matter that much?”, “Do microinverters produce less power?”, “What’s the difference between one inverter and another?”, “Does the mounting structure matter?”, “What happens if a company installs solar panels using cheaper materials?”

The short answer is simple: not everything is the same.

The key point is that, when it comes to solar power, the initial price tells only part of the story. What really determines whether a solar installation is good or bad is the energy it will produce over its lifetime, how reliably it will operate, the quality of the components installed, the actual warranty behind it, and the installation company’s ability to properly design, install, obtain the necessary permits, and maintain the system.

In this article, we debunk 10 myths about solar energy that you should be aware of before installing solar panels.

Myth 1: “All solar panels are the same, so I’ll just buy the cheapest one”

This is one of the most common myths when someone starts comparing quotes for solar panels. At first glance, many panels may look practically identical: a black or bluish surface, an aluminum frame, and a peak wattage listed on the technical specifications. That’s why it’s easy to assume that, if two quotes offer installations with similar power output, the logical choice is to go with the cheaper option.

The problem is that a solar photovoltaic system shouldn’t be viewed as an expense, but as an investment. When you install solar panels, you’re not just buying panels for your roof. You’re buying a portion of the electricity you’ll consume over the next 25, 30, or even 40 years. And, as with any investment, it’s not just how much you pay up front that matters, but how much you get in return over the system’s entire lifespan.

A more affordable panel may seem appealing in the initial budget, but if it has a shorter product warranty, higher degradation, poorer performance in hot weather, or more limited coverage, it may end up generating less guaranteed energy over time. In contrast, a premium panel may have a higher upfront cost, but it will produce more energy over a longer period and offer a much more robust warranty.

The correct comparison should not be “how much the installation costs,” but rather “how much each kWh of guaranteed energy that the installation will produce costs.”

A simple example: initial price vs. actual energy cost

Let’s imagine two 10-kWp photovoltaic systems in Málaga, an area with very good solar radiation. To simplify matters, let’s assume that both produce approximately 15,000 kWh per year.

At first glance, the first system seems better because it costs less. But if you look at it as a long-term energy investment, the second one may be much more cost-effective, since it guarantees a greater amount of energy for many more years.

This doesn’t mean you always have to install the most expensive panel on the market. It means you need to compare options carefully. The ideal panel will depend on the type of customer, energy consumption, available space, the roof, the budget, how long you plan to stay in your home or business, and the level of warranty you want.

Whether it’s a primary residence, a business with daytime electricity usage, or a facility where the customer is looking for long-term stability, the cheapest panel isn’t always the best choice. In many cases, the best option is the one that offers the best balance between energy production, warranty, durability, and actual energy costs.

Myth 2: “All solar panel warranties are the same”

This myth is particularly dangerous because it is often disguised behind an eye-catching figure. It’s common to hear statements like “these panels come with a 25-year warranty” or “these others are guaranteed to be in production for 30 years.” The problem is that, in the photovoltaic industry, the number of years in a warranty alone doesn’t tell the whole story.

You need to know what kind of warranty it is, exactly what it covers, when it takes effect, who it protects, and what happens if the panel fails in 10, 15, or 20 years.

There are two main warranties for solar panels: the product warranty and the performance warranty. The product warranty covers defects or malfunctions in the panel itself. For example, if the panel stops working without having been subjected to an impact, a discharge, an external event, or improper handling. The performance warranty, on the other hand, guarantees that the panel will maintain a certain level of performance over time.

Confusion arises when more importance is placed on the production warranty than on the product warranty. A long production warranty may sound great, but if the product warranty is short and also does not cover labor, transportation, installation, removal, or travel, the actual protection for the customer may be quite limited.

Comparison: What People Usually Look At vs. What Really Matters

One of the most important points is when the warranty period begins. For some manufacturers, the warranty period may begin when the manufacturer sells the panel to the distributor, not when the end customer installs it in their home or business. This means that a panel may have been in storage for months or years before being installed, and that part of the warranty may already have expired.

In high-quality installations, this is handled differently. Ideally, the panels should be properly registered, and the customer should have a clear, traceable warranty tied to their installation. For example, with premium solutions like SunPower Maxeon, the warranty can cover up to 40 years for both the product and its performance, offering much more comprehensive coverage than many conventional panels.

A warranty isn’t just a nice piece of paper to include in the budget. It’s a fundamental part of the investment. If a facility is designed to generate energy for decades, the warranty must be up to the task.

Myth 3: “All solar cells are the same”

From the outside, two solar panels may look very similar. They may even have similar power ratings and dimensions. But on the inside, the technology can be very different. And that internal difference has a direct impact on the panel’s power output, degradation, mechanical strength, and lifespan.

Conventional solar cells typically use visible conductive lines on the front, known as bus bars. These lines collect the electricity generated by the cell and conduct it to the panel’s circuit. It is a widely used technology and can function properly, but it has limitations. If the cell cracks, breaks, or develops microcracks, these electrical pathways can be affected, leading to losses in power output or hot spots.

Microcracks are one of those problems that aren’t always visible to the naked eye. A panel may look perfect from the ground, but it may have sustained internal damage during transport, handling, or installation. They can also be caused by bending, vibrations, hail, temperature changes, or improper foot traffic on the panel. In large-format panels, careless handling can create stress in the glass and the cells.

This is where technologies like Maxeon cells make a significant difference. SunPower Maxeon cells use a back-contact architecture, eliminating the main contacts from the front. In addition, they incorporate a copper substrate that provides greater mechanical strength and helps dissipate heat. This improves the cell’s durability and reduces the risk of internal fractures that could affect performance.

And heat matters a lot. Solar panels generate electricity from light, not from heat. In fact, when the panel’s temperature rises too high, its efficiency can drop. That’s why a cell that manages temperature better and degrades less over time can provide more useful energy throughout its lifetime.

Key differences between a conventional cell and a premium Maxeon-type cell:

That’s why, when someone says that “all panels are the same,” they’re really only comparing their outward appearance. What makes the difference is on the inside: the cell, the materials, the encapsulation, the glass, the frame, the connectors, the warranty, and the manufacturing controls.

In solar energy, what you can’t see is often what matters most.

Myth 4: “Microinverters produce less power than a traditional inverter”

This myth stems from a flawed comparison. Many people notice that a solar panel may have, for example, 415 Wp, while the associated microinverter has a lower maximum output power. From there, the quick conclusion is often: “The microinverter is limiting the panel’s output, so it produces less.”

The reality is more nuanced. Yes, there may be specific times of the day when the panel can produce more power than the microinverter can handle. This phenomenon is often called “clipping” or “power clipping.” But to determine whether a system produces more or less power, you shouldn’t look only at the midday peak. You have to look at the total energy generated throughout the day, the month, and the year.

A traditional string inverter requires a series of panels to reach a minimum voltage before it begins operating. As a result, under certain conditions, it may start later in the morning and stop earlier in the afternoon. In contrast, microinverters operate on a panel-by-panel basis and can begin generating power even at very low levels of sunlight. This allows for better use of the early morning hours, the late afternoon hours, and situations involving partial shading, different orientations, or varying tilt angles.

On a perfect, spacious roof with no shadows and all panels facing the same direction, a string inverter can be an excellent solution. But in many real-world homes, especially in residential areas of Málaga and the Costa del Sol, roofs have multiple slopes, chimneys, roof boxes, antennas, partial shadows, or separate sections. In such cases, microinverters can offer a clear advantage because each panel operates independently.

Microinverters vs. String Inverters: When Is Each Option Best Suited?

The right question isn’t whether microinverters are better or worse in every case. The right question is: Which technology is the best fit for this roof, this energy consumption, and this customer?

At Ubora, we don’t advocate a one-size-fits-all solution. We design each installation based on the specific circumstances of the project. There are homes where microinverters make a lot of sense, and there are installations where a string or hybrid inverter is the most logical choice. The key is not to sell a technology out of habit, but to choose it based on engineering principles.

Myth 5: “All solar mounting systems and structures are the same”

Solar mounting structures often receive less attention than panels or inverters, but they are a critical part of the installation. After all, they are responsible for keeping the panels secured to the roof for years, withstanding wind, rain, humidity, solar radiation, temperature changes, vibrations, and, in many areas, a marine environment.

A photovoltaic system isn’t installed to last just a few months. It’s installed to operate for decades. That’s why the mounting structure can’t be a generic component or a makeshift solution. It must be specifically designed for photovoltaic systems and be compatible with the type of roof on which it is installed.

When a quote simply lists “aluminum structure,” information is missing. A structure from a reputable manufacturer—complete with testing, warranties, and technical documentation—is not the same as a generic profile adapted from another application. Nor is a tile roof the same as a sandwich panel, a flat roof, a pergola, a concrete structure, or a facility near the sea.

In areas such as Málaga, Torremolinos, Benalmádena, Fuengirola, Marbella, Estepona, Rincón de la Victoria, and Nerja, the marine environment can be a decisive factor. Salinity accelerates corrosion processes and can affect certain materials if they are not designed for that environment. Therefore, for facilities near the coast, it is advisable to verify whether the structure is suitable for a marine environment and whether the manufacturer honors the warranty at that location.

A good structure should provide support, but it must also be compatible with the roof. Poor installation can lead to leaks, movement, noise, broken shingles, or structural problems. And the worst part is that many of these problems don’t show up right away. They emerge over time, once the installation has been exposed to the elements for years.

What Should a Structural Line Item Include in a Professional Budget?

If you’re going to compare quotes, don’t just look at the panels and the inverter. Also consider how those panels will be mounted over the next few years. The mounting structure is one of those components that, if done right, goes unnoticed. But if it’s done poorly, it can become a serious problem.

Myth 6: “All solar inverters are the same”

The inverter is one of the most important components of a photovoltaic system. Its basic function is to convert the direct current generated by the panels into alternating current that can be used by a home or business. But today’s inverters can do much more than that.

An inverter can manage batteries, control critical loads, provide backup power during outages, integrate with generators, communicate with monitoring systems, limit power feed-in to the grid, coordinate with electric vehicle chargers, or form part of a broader energy management strategy.

Therefore, it is a mistake to say that all inverters are the same simply because they have the same power rating. Two 5-kW inverters can have completely different performance, durability, connectivity, compatibility, and scalability.

Some inverters are designed for simple residential installations. Others have a more industrial, robust, or flexible design. Some use high-voltage batteries, while others use low-voltage batteries. Some allow for a generator connection, while others do not. Some feature a touchscreen for on-site diagnostics, while others rely almost entirely on the app. Some offer more communication options, while others are more closed-off.

This doesn’t mean that one is always good and the other always bad. It means that every project needs the right investor.

A household that simply wants to lower its energy bill with a straightforward installation may need a different solution than one that wants a battery, backup power, an electric charger, an air-source heat pump, and advanced management features. Similarly, a business with stable daytime energy consumption does not have the same needs as a residential customer with nighttime energy consumption who plans to install an electric vehicle.

Practical Comparison: What to Look for in an Inverter

At Ubora, we view the inverter as part of an energy system, not as a standalone unit. Today you can install solar panels, but tomorrow you might want to add a battery, an electric vehicle charger, a heat pump, a backup system, or more advanced energy management. If the inverter isn’t chosen correctly from the start, that upgrade could be more difficult—or even impossible.

Myth 7: “Electrical safety measures don’t matter”

This myth is one of the most sensitive, because it directly affects the safety of the installation. Many estimates include a very generic line: “electrical safeguards included.” The problem is that this phrase says practically nothing.

We do not know which brand will be installed, what type of protection is included, whether there is protection for both direct and alternating current, whether surge protection is provided, what type of enclosure will be used, how the panel will be wired, what the quality of the components is, or whether the system is designed to accommodate future expansions.

Electrical safety devices are not just a formality. They are designed to protect people, homes, equipment, the inverter, the wiring, and the entire system from short circuits, ground faults, power surges, and electrical failures. In a photovoltaic system, there is also a direct current component that requires special attention.

A solar installation operates every day for many hours. The materials heat up, cool down, expand, contract, and withstand varying loads. A poorly executed connection can eventually lead to overheating, loose connections, electrical arcs, or malfunctions. And this doesn’t always happen right away. It can develop over time.

A very clear example is how to connect terminal blocks and terminal strips inside an electrical panel. If a mechanism is not designed to properly accommodate both components and they are inserted haphazardly into the same clamping point, the connection may not be securely fastened. Over time, that connection can loosen, overheat, and become a safety hazard.

That’s why working with top-tier brands and the right tools isn’t just about showing off technical expertise. It’s about security.

Electrical Safety Measures: Basic Estimate vs. Professional Installation

Electrical safety should not be the area where cuts are made to reduce costs. If an installation is going to be in operation for decades, the electrical panel and its protective devices must be on par with the rest of the system.

Myth 8: “Any chemical anchor can be used to mount solar panels”

On many tile roofs, the solar mounting structure passes through the tiles and is anchored to the roof deck or underlying support. Anchoring systems—and, in many cases, chemical anchors—are used for this purpose. So far, so good. The problem is assuming that just any chemical anchor is suitable for a photovoltaic installation.

A solar installation is located outdoors, exposed to the sun, rain, humidity, temperature fluctuations, wind, and vibrations. In coastal areas, it may also be exposed to a salty environment. Therefore, the mounting system must be designed to withstand these conditions for many years.

Not all chemical anchors are designed for the same use. Some products may be suitable for indoor or less demanding applications, but may not be the best choice for a solar installation exposed to the elements. Others are formulated to offer better resistance to outdoor conditions, humidity, or more severe conditions.

The situation here is similar to what happens with panels: the cheapest material may seem to work well on the first day, but that doesn’t mean it’s suitable for lasting 25, 30, or 40 years on a roof.

Furthermore, it’s not enough to simply choose a good product. You also have to apply it correctly. The drill bit must be the correct diameter, the hole must be thoroughly cleaned, the resin must be mixed properly, the curing time must be observed, and the anchor must be installed to the correct depth and with the proper torque. If any of these steps is done incorrectly, the anchor may not perform as intended.

What can go wrong if the anchor isn’t suitable?

In a photovoltaic system, mounting isn’t just a minor detail. It’s what holds the entire system in place on the roof. That’s why, at Ubora, we pay close attention to both the materials and the installation process. It’s not just about ensuring the system looks good on the day it’s commissioned—it’s about making sure it remains safe for many years to come.

Myth 9: “All MC4 connectors are the same”

This myth is very common because MC4 connectors are constantly mentioned in the solar industry. The term “MC4-type” is frequently used in technical specifications, quotes, and sales conversations. But there’s one important detail: MC4 is a registered trademark of Stäubli.

That means that an original MC4 connector is a Stäubli MC4. Other connectors may be compatible or “MC4-type,” but they are not necessarily the original and may not have the same quality, tolerances, watertightness, or durability.

It may seem like a minor detail, but it isn’t. The connectors operate in the DC portion of the system, typically outdoors, where they are exposed to solar radiation, humidity, temperature fluctuations, water, dirt, and mechanical stress. A faulty connector can cause power losses, overheating, insulation failures, water ingress, or safety issues.

Furthermore, connector compatibility isn’t always as straightforward as it seems. Two connectors from different manufacturers may fit together physically, but they may have slight differences in tolerance, gasket, contact pressure, or material quality. These differences may not be noticeable at first, but they will become apparent after years of exposure to the elements.

In high-quality installations, connectors must be genuine or from reputable manufacturers; they must be crimped using the proper tool and installed in accordance with the manufacturer’s instructions. They should not be left lying in areas where water can accumulate, nor should connectors from different brands be mixed indiscriminately.

Solar Connectors: Why They Matter So Much

Connectors are small and don’t usually take center stage in a budget. But in photovoltaics, problems often stem from the small details. And a connector that is in poor condition, poorly crimped, or of low quality can compromise an installation that otherwise seemed fine.

Myth 10: “All solar energy companies are the same”

This myth sums up all the previous ones. If all panels were the same, all warranties covered the same things, all inverters had the same features, all mounting structures were equally durable, all safety features were equivalent, and all connectors offered the same level of safety, then perhaps it would make sense to choose a company based solely on price.

But the reality is exactly the opposite.

A well-executed photovoltaic installation requires research, engineering, electrical design, roof analysis, material selection, professional installation, regulatory approval, monitoring, and after-sales service. It’s not simply a matter of placing solar panels on a roof.

A good installation company should be able to analyze the customer’s actual energy consumption, recommend an appropriate power rating, anticipate future needs, clearly explain the materials, justify technical decisions, properly obtain the necessary permits for the installation, and respond if a problem arises.

At Ubora, we take a comprehensive approach to energy. We specialize in solar power, energy storage, electric vehicle chargers, geothermal heating, home automation, and energy management. This allows us to design systems that go beyond simply “installing panels,” but instead take into account how the customer consumes energy today and how their needs may evolve in the future.

For example, a home might start with solar panels and later add a battery or an electric vehicle charger. A business might install a self-consumption system now and later need advanced monitoring, demand control, or integration with other energy uses. A community might move from considering an individual installation to exploring collective self-consumption. A hotel can combine solar power, geothermal heating, energy storage, and energy management to improve its efficiency.

The difference between one company and another isn’t just about the budget. It’s about the technical decisions it makes before, during, and after installation.

How to Identify a Professional Solar Company

A professional solar company doesn’t try to sell the same solution to everyone. It listens, analyzes, designs, and proposes the option that makes sense for each specific situation. And it must also be able to tell when something isn’t a good fit, when a battery isn’t cost-effective, when a roof isn’t suitable, or when a seemingly cheap quote could end up being expensive.

Conclusion: Solar energy is definitely worth it, but not all options are equally good

Solar photovoltaic energy is a mature, cost-effective solution that makes a lot of sense for homes, businesses, communities, and industries. But for it to work well for years to come, it’s not enough to simply install “solar panels.” You need to design a comprehensive, safe, and future-proof energy system.

The biggest mistake when comparing quotes is to focus solely on the initial price. A cheaper installation may seem attractive today, but it could end up costing more in the long run if it produces less, wears out sooner, comes with limited warranties, uses low-quality materials, or lacks good after-sales service.

The right question isn’t “Which system is the cheapest?”, but rather “Which system will guarantee me more energy, greater safety, longer durability, and fewer problems over the next few years?”

At Ubora, we design solar power systems with a focus on engineering, quality, and comprehensive energy management. We work with high-performance solutions for homes, businesses, communities, industries, and customers who are looking for more than just a low price: they want a system that is reliable, safe, and built to last.

If you’re considering installing solar panels and want to know which solution is best suited for your home or business, we can help you assess your situation and design a system built to generate energy for decades to come.

At Ubora, we analyze your energy consumption, your roof, and your energy goals to design a safe, cost-effective, and future-proof solar power system.

Request your personalized assessment and find out how much you can save with a high-quality solar installation.

If you’d like to learn more about the myths surrounding solar energy, we invite you to watch the full video on our YouTube channel:

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