What is the best inverter for solar panels?
Erbil Karadag
Looking for the best inverter for your home or office? Read this blog post to find out! To determine the best inverter for your solar panels , it is important to look at the different types of inverters. The two most important inverters are the string inverter and the micro inverter.
What should you pay attention to when choosing an inverter?
Choosing the best inverter depends on several factors, such as the size of your solar panel system, the orientation of your roof and any shade. In addition, it is important to look at the lifespan and warranty of the inverter. A good inverter lasts an average of 10 to 15 years, while solar panels often have a lifespan of 25 years. This means that you will probably have to replace the inverter at some point during the lifespan of your solar panels.
Another important aspect is the efficiency of the inverter. The more efficient the inverter, the more of the generated energy is actually converted into usable power. Most modern inverters have an efficiency of around 95-98%, but even small differences in efficiency can make a big difference in your energy bill in the long run. You also have to consider the warranty. Some manufacturers offer a 5-year warranty, while others offer 10 or even 15 years.
What is a string inverter and what are its advantages and disadvantages?
A string inverter is one of the most commonly used types. In this type, the solar panels are connected in a series (or string), and one central inverter converts the current of all panels at the same time. This type is often cost-efficient, but the disadvantage is that if one panel performs less well (for example due to shade), this affects the performance of the entire string.
Advantages of string inverters
String inverters are the most common and affordable technology for solar energy systems, especially in residential and commercial applications. Here are some of the main advantages of using string inverters:
Cost effective
One of the biggest advantages of string inverters is their relatively low price compared to alternatives such as microinverters or power optimizers. Because one inverter can manage multiple solar panels, this saves costs on the total investment in the solar energy system.
Easy installation
String inverters typically require less wiring and equipment than more complex systems. This makes installation easier and faster, resulting in lower labor costs and less chance of installation problems.
Reliability
These inverters have a long history of proven performance and reliability. Because fewer electronic components are needed per solar panel compared to microinverters, there are fewer potential points of failure. This means less maintenance and lower costs in the long run.
Efficient for uniform roof surface
If your roof or mounting surface is evenly lit and the panels are all at the same angle and direction, a string inverter is very efficient. As long as all the solar panels deliver the same output, the string inverter can convert the power effectively without much energy loss.
Less complex maintenance
Unlike systems with multiple microinverters, which are located on each solar panel, string inverters are centrally located. This makes it easier to perform maintenance or replacement when necessary. Technicians only need to inspect one inverter instead of several.
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Disadvantages of string inverters
While string inverters offer many advantages, there are also some disadvantages that are worth considering, depending on your specific situation and energy needs.
Reduced efficiency in shade
The biggest disadvantage of string inverters is their sensitivity to shading. In a string inverter system, solar panels are connected in series, which means that the weakest panel can limit the performance of the entire string. If one panel is in the shade, for example by a tree or a chimney, this can negatively affect the efficiency of the entire string.
No individual monitoring of panels
With string inverters, the output of the entire string is monitored, not each individual panel. This makes it harder to detect which panel is underperforming. Unlike microinverters or systems with optimizers, which offer panel-specific monitoring, you get less detailed insights into the performance of your system.
Less flexibility in design
String inverters work best when all solar panels are installed on the same roof angle and under the same conditions. Differences in orientation or slope can lead to reduced efficiency. This can be a problem if your roof has different planes or if your solar system is being installed in phases.
Limited future-proofing
String inverters are generally less suitable if you want to expand the system in the future. If you want to add extra solar panels later, you have to make sure that the inverter has sufficient capacity, otherwise a new inverter is needed. This makes string inverters less flexible than micro inverters, which are more easily scalable.
Shorter lifespan than solar panels
Although string inverters are reliable, they generally have a shorter lifespan than the solar panels themselves. Solar panels last an average of 25 years, while string inverters need to be replaced after 10-15 years. This means that you will likely have to make an additional investment for replacements over the life of your solar panel system.
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What are the benefits of a micro inverter and why it is a strong option!
The microinverter works differently. Each panel has its own inverter, meaning that the performance of each individual panel is measured and converted independently. This is particularly useful if you have shading on certain parts of your roof, as the performance of the other panels is not affected.
Benefits of Micro Inverters
Microinverters offer an advanced technology for solar power systems and are becoming increasingly popular due to their unique advantages. Instead of one central inverter managing multiple solar panels, a microinverter system uses individual inverters for each panel. This offers several advantages that are relevant, especially for more complex systems. Here are the main advantages of microinverters:
Maximization of energy yield
The biggest advantage of microinverters is that each solar panel operates independently. This means that each panel can produce its own optimal energy, without being affected by the performance of other panels. In a string inverter system, one panel in shade can limit the performance of the entire string, but with microinverters, the energy output of each panel remains maximized, even if part of the system is affected by shade, dirt, or odd orientations.
Excellent performance in shade
Microinverters are ideal for roofs that are sensitive to shadow formation. Whether it is chimneys, trees or other obstacles, the shadow on one panel does not affect the rest of the panels. This makes them particularly suitable for roofs with different lighting conditions during the day or roofs with multiple roof surfaces.
Panel specific monitoring
Microinverters allow you to monitor the performance of each individual solar panel in real-time. This provides accurate insight into how each panel is performing, helping to quickly identify any issues or defects. This detailed monitoring can lead to more efficient maintenance and faster detection of underperformance, which contributes to better energy production in the long run.
Flexibility in design
Microinverters offer much more flexibility when designing solar panel systems. Panels can be installed in different ways and in different locations on your roof. Without negatively affecting the efficiency of the system. This is especially useful for roofs with multiple sides or when panels are added in phases. In addition, microinverters can easily be integrated into expansion projects, making them highly scalable for future expansion.
Future-proofing 
Unlike string inverters, which are often limited in scalability. Micro inverters are ideal for systems that need to be expanded in the future. Want to add more solar panels later? No problem, you just need to add new panels with the corresponding micro inverters. Without having to worry about the capacity of the inverter.
Longer lifespan
Microinverters typically have a longer lifespan than traditional string inverters. Where string inverters often need to be replaced after 10-15 years. Microinverters can last as long as the solar panels themselves, around 25 years. This can lead to lower maintenance costs and less disruption to your system in the long run.
Safety
Another important advantage of microinverters is safety. Because they are connected directly to each solar panel, the direct current (DC) is converted directly to alternating current (AC) on the roof. This reduces the risk of fire hazards, which often come with high DC voltages through long cables, as is the case with string inverters. This makes microinverters a safer option for residential and commercial installations.
Suitable for complex roof shapes
Microinverters are particularly useful for installations on roofs with complex shapes or where the orientation of the panels varies. Whether it is a south, east or west facing roof. Each panel works independently, ensuring optimum energy yield regardless of position.
Have you discovered that you need a micro inverter?
Disadvantages of micro inverters
While microinverters offer many advantages, there are also some disadvantages that should be considered when choosing a solar energy system. Below is a summary of the main disadvantages of microinverters:
Higher initial costs
One of the biggest drawbacks of microinverters is their higher initial cost. Because each solar panel requires a separate inverter, the cost per watt is significantly higher than traditional string inverters. This often makes the initial investment more expensive, especially for large systems with many solar panels. The higher cost can be a barrier for homeowners and businesses who have a limited budget for their solar project.
More complex installation
While microinverters offer a great deal of flexibility in the design of a solar system, installation can be more complex compared to string inverters. Because each panel has its own inverter, more wiring is required and installation is more time-consuming. This can increase labor costs, especially for larger systems. Installers must also be well-versed in the technology to ensure proper installation.
More components can lead to more maintenance
Microinverters add extra electronic components to the system, as each panel has its own inverter. While they are generally very reliable, this increases the number of potential failure points. If a microinverter fails, it must be replaced on the roof, which can increase maintenance costs compared to a string inverter system, where only one inverter is centrally located.
Higher repair costs per inverter
Although microinverters typically have a longer lifespan, they can be more expensive to repair if they do fail. Because the inverters are located on each individual panel, replacing a microinverter can be more difficult than repairing or replacing a central string inverter. The complexity of the repair can result in higher costs.
Potential difficulties with accessibility
Because microinverters are installed directly behind the solar panels, access can be difficult if repairs are needed. If an inverter fails, the installer may have to climb onto the roof and remove a solar panel to access the inverter. This can be time-consuming and cost-effective compared to string inverters, which are installed in a central and easily accessible location.
Oversizing systems can be costly
Some solar systems are designed with future expansion in mind, such as adding more panels to increase energy production. While microinverters are great for scalable systems, oversizing a system with microinverters can be expensive, as you need an inverter for each additional panel. This means that you need to make a larger upfront investment to ensure that you can easily add more panels later.
Limited benefits under homogeneous roof conditions
In situations where all solar panels operate under the same conditions (for example, if they are installed on a single flat roof without shading), microinverters do not offer significant advantages over string inverters. Because each panel operates independently, the added value of microinverters is greatest in systems where panels are mounted at different angles or where shading is a factor. If these factors do not apply, choosing microinverters may result in unnecessary costs.
More complex system diagnostics
Although microinverters allow for panel-specific monitoring, diagnosing problems in a system with many microinverters can be more complex. In the event of a fault, technicians may need to check each panel individually to resolve the issue. Although monitoring software often helps identify faults, finding the specific problem can be time-consuming in systems with dozens or even hundreds of panels.
A lot of pros and cons, would you rather contact a specialist?
Our Favorite Inverter Brand?
At HTX Solar, we strive to provide our customers with only the best solar solutions. That’s why we proudly recommend Deye products. Deye has proven itself as a reliable player in the inverter and other solar solutions market, and there are several reasons why we confidently recommend their products to our customers.
Excellent quality
Deye is known for the high quality of their products. Their inverters and energy solutions are manufactured with advanced technologies and robust materials that guarantee durability and long-lasting performance. Deye products are designed to perform optimally even under the toughest conditions, making them an excellent choice for both residential and commercial solar energy systems. These high quality standards ensure that you as a customer can rely on a reliable and efficient energy solution.
Good value for money Strong customer service
One of the main reasons why HTX Solar chooses Deye is their strong customer service. Deye offers excellent support for both installers and end users. Whether it is technical questions or support during installation, the Deye team is ready to help quickly and professionally. This customer-centric approach makes it easier for HTX Solar to provide our customers with a seamless experience, from purchase to after-sales support. It is reassuring to know that Deye is always ready to quickly resolve any issues.
Extensive online manuals and video explanations
Another great advantage of Deye is their extensive range of online manuals, tutorials and video explanations. These materials are carefully designed to guide both installers and end users step-by-step through the installation process and operation of their products. This makes it easy for customers to look up technical information themselves or to better understand the system. The user-friendly and informative videos help to quickly solve any questions or problems, without always having to call in professional help.
For example, this video:
Conclusion:
After reading this article, you should now have a good overview of the different types of inverters, namely string inverters and microinverters, and their respective advantages and disadvantages. Whether you choose a string inverter for its lower cost and easy installation, or a microinverter to get the most out of your solar system, especially on shaded roofs or multiple roof surfaces, depends on your specific situation. It is essential to consider factors such as the size of your system, the orientation of your roof, potential shading, and your future plans for expansion.
At HTX Solar , we recommend Deye inverters not only for their excellent quality and reliable performance, but also for their strong price-performance ratio. In addition, Deye offers excellent customer service, which means that you can always count on fast and expert support, both during installation and for any questions or problems afterwards. Furthermore, the extensive online manuals and video explanations make it easy to find technical information and understand the installation process yourself. This not only gives you a reliable and efficient energy solution, but also the certainty that your system is easy to manage and maintain.
