10 Best Brands and Models of Solar Panel Inverters in 2024
A solar inverter, or solar panel inverter, is a pivotal device in any solar power system. Solar inverters efficiently convert the direct current (DC) produced by solar panels into alternating current (AC), the form of electricity used in homes and on the power grid. The selection of the right solar inverter is vital for optimizing energy efficiency and ensuring the seamless operation of your solar energy system.
Different types of inverters and inverter models have their own strengths and weaknesses depending on the size of the solar installation, the specific needs of the user, the available budget, and the desired features. Among the numerous solar inverters available in 2024, three models stand out for their exceptional performance and innovative features.
- SolarEdge HD Wave (BEST OVERALL): Recognized for its ultra-efficient conversion capability and compact size, the SolarEdge HD Wave employs advanced HD wave technology. Its compatibility with DC optimizers significantly enhances solar panel output, making it a top choice for efficiency and performance.
- Fronius Primo (MOST RELIABLE): Notable for its reliability and adaptability, the Fronius Primo is an excellent fit for both home and small-scale industrial use. Its smart optimization algorithm and compatibility with future battery storage upgrades make it a forward-thinking choice.
- GoodWe DNS Series (BEST FOR RESIDENTIAL): Distinguished by its combination of durability, efficiency, and advanced features like IP65 dust proofing and waterproofing, the GoodWe DNS Series is an ideal choice for residential installations. Its user-friendly monitoring system and competitive pricing add to its appeal.
Beyond these select choices, there are at least seven other candidates to make up the list of best brand of solar inverter on the market in 2024.
The top 10 solar inverters in 2024 are outlined in detail below.
1. Enphase IQ8
The Enphase IQ8 microinverter is an innovative solar power inverter produced by Enphase Energy, an American energy management technology company founded in 2006. This inverter system particularly excels in low-light environments, significantly enhancing energy efficiency. Each solar module has a dedicated IQ8, ensuring optimal function and design flexibility while converting DC to AC power directly at the source. However, the main disadvantage of the Enphase IQ8 solar inverter is its backup energy limitations, as it cannot provide sufficient power for all loads and is heavily dependent on varying factors like cloud cover and sunlight intensity, rendering it ineffective during a power outage at night
Specifications of the Enphase IQ8 include a peak output power of 366VA, a maximum constant output current of 349VA, and a maximum DC voltage of 58V. It boasts a high EU inverter efficiency of 96.5%, with dimensions of approximately 8 × 7 × 1.20 inches and a weight of about 2.50 pounds. Operational temperatures range from -40°F to 140°F, ensuring robust performance under a variety of conditions.
Regarding monitoring, the Enphase mobile app enables fast and convenient oversight of your Enphase Home Energy System from any location. Additionally, should you have any questions about the system, you can contact Enphase Customer Support at any time on their official website and get a prompt response.
Cost-wise, the Enphase IQ Series Micros IQ7+ 290VA Microinverter ranges from $140 to $200+, and the IQ7 240VA Microinverter is priced between $100 and $180+. Their low price, superior efficiency, low failure rate (0.051%), and long-term benefits make them a worthwhile investment. Plus. While the standard warranty for the Enphase IQ is 10 years, it is extendable to 25 years in some regions, making it one of the most sought-after solar inverters in the market.
2. SolarEdge HD Wave
The SolarEdge HD Wave, produced by the renowned Israeli company SolarEdge, is the world's smallest string solar power inverter, renowned for its exceptional efficiency in converting DC to AC power. It utilizes advanced HD wave technology, which contributes to its compact size and superior performance. This technology enables the HD Wave to achieve greater efficiency than other market options, making it a leading choice for solar power systems.
One of the key features of the HD Wave is its compatibility with DC optimizers. These optimizers, attached beneath solar panels, enhance the output of each panel, improving overall system performance, especially in shaded areas. Setting up the inverter this way allows for individual panel monitoring and increased safety through panel shutdown in case of faults. However, the additional cost of optimizers and the labor for installation might be a consideration for some.
In terms of specifications, the HD Wave's dimensions are approximately 11 x 14.6 x 5.6 inches, making it compact yet slightly bulkier due to its DC isolator switch. The efficiency of the HD Wave is the highest among solar inverters, with efficiency ratings up to 99% for the larger models. This high efficiency translates to less heat production and potentially lower operational temperatures, despite its smaller size and lack of active cooling fans.
The cost of the SolarEdge HD Wave inverter sits at about $1700, reflecting its advanced technology and efficiency. This model comes with a 12-year warranty, which covers the replacement unit (but not installation costs). There is an additional warranty of 25 years for the DC optimizers of the HD Wave, which pair to each solar panel.
3. SMA Sunny Boy
SMA, which stands for "System, Mess, and Anlagentechnik" in German (translating to System, Measurement, and Plant Technology), is a leading manufacturer in the solar energy industry. The SMA Sunny Boy inverter is their groundbreaking hybrid solar panel inverter, allowing both immediate solar energy use and long-term storage in one single device. The Sunny Boy offers a unique power feature called Secure Power Supply (SPS), a component that provides 2000 watts of backup power from solar panels during outages.
However, some users have noted that the Sunny Boy's performance is hindered by shading or varied panel orientation. In such cases, each panel in a string drops to match the output of the weakest panel, potentially leading to a significant power loss. Additionally, its larger size makes installation challenging.
SMA is noted for its excellent customer support, which is crucial for troubleshooting and claims processing. To complement this, the Energy App is accessible on both iOS and Android platforms to offer customers a comprehensive visualization of the PV system.
When it comes to prices, Sunny Boy models range from 3 kW to 7.7 kW, with the 3.0kW model costing around $1,300 and the 7.7kW costing approximately $2000. Despite these competitive prices, Sunny Boy’s standard 10-year warranty is shorter compared to some competitors, which constitutes another minor drawback.
4. Fronius Primo
Fronius, an Austrian company with a strong reputation in the field of welding and solar technology, offers the Fronius Primo as a testament to their innovation. The Fronius Primo is a compact single-phase inverter series that is ideal for home and small-scale industrial use, with power categories ranging from 3.8 kW to 8.2 kW. The Fronius Primo solar inverter stands out for its reliability and superior performance. It features a smart optimization algorithm that efficiently extracts energy from solar panels, even in conditions of partial shade or across multiple roof areas. The most recommended model, the Fronius GEN24, improves upon its 'SnapINverter' predecessor by being quieter and more adaptable, especially for future battery storage upgrades.
Key advantages of the Fronius Inverter include its exceptional local support and warranty, an ethical approach to the product's full life cycle, high DC input current compatibility, and surge capacity for hybrid output during blackouts. The main drawbacks to bear in mind with the Fronius Inverter are its 40-second delay in hybrid backup mode and the premium price, which ranges from $2000 to $3500.
Regarding monitoring capabilities, Fronius Solar.web serves not only as a professional tool offering continuous real-time system data for installers but also delivers extensive analytical functions. These functions allow for personalized consultation and continual enhancement of the PV system's performance.
The warranty for Fronius inverters includes a standard 5-year Fronius Warranty Plus, which can be extended to an additional 5 years upon registration. The standard initial warranty covers both parts and labor, while the extended 10-year warranty covers only parts.
5. Enphase IQ7+ Microinverter
The Enphase IQ7 micro-inverter, particularly the IQ7+ model, is a high-efficiency solar panel inverter ideal for grid-tie systems. It's favored for its easy installation, shade tolerance, and flexible array design. The latest generation, including the IQ7+ and the new IQ7X, is compatible with 96-cell modules, marking an increase in capacity.
The Enphase IQ7+ solar micro-inverter addresses the limitations of string inverters by allowing each panel to function independently, making them highly shade-tolerant and easy to install. Each unit can be linked using common household AC wiring, further simplifying the installation process.
However, the IQ7+ requires the separate purchase of the Enphase IQ Envoy for system monitoring. The distributed nature of micro-inverters introduces more potential failure points than a single-string inverter system.
Each IQ7+ micro-inverter is priced at about $150, with an additional $18 for mandatory Q Cable connectors. The IQ7+ is rated at 290 watts with a peak efficiency of 97.6%. While they offer a higher cost per watt, their 25-year warranty and efficiency make them a compelling choice for smaller, shade-affected, or incrementally growing solar systems. For larger-scale systems in full sunlight, the SMA Sunny Boy or SolarEdge HD-Wave might be more economical.
6. DELTA Home Series
Delta, a global leader in power and thermal management solutions founded in 1971 in Taiwan, presents its Home Series - a line of solar panel inverters specifically designed for residential use. These high-efficiency, single-phase inverters range from 2.5kW to 5kW and are notable for their low start-up voltage of 35V. This allows them to function effectively during the early morning and late evening hours, outperforming competitors like Fronius’ equivalent 5kW inverter, which starts at 80V. This key feature of Delta's inverters significantly enhances energy generation over the system's lifespan.
The H5A_222 stands out for its ability to function even with a single solar panel, a unique capability among inverters that usually require multiple panels. Some of Delta’s inverters have been recognized as top performers in PV Evolution Labs’ independent tests, affirming their quality and efficiency.
Delta inverters feature up to four Maximum Power Point Trackers (MPPTs) for different roof orientations, providing flexibility in system design. Efficiency-wise, Delta inverters boast high ratings, generally between 95 to 98 percent, with some models reaching up to 98.3% max efficiency.
Regarding monitoring, Delta inverters are monitored through their own cloud-based platform, DeltaGrid, which provides real-time data and analytics for system performance. For support with Delta inverters, contact Delta Electronics directly through their customer service hotline or email, or use the support form available on their official website.
Cost-wise, Delta solar inverters are competitively priced at approximately 23 cents per watt, with the H5A_222 model ranging between $1,000 and $1,300. These costs typically represent 10-20% of the total solar system investment, underscoring the importance of choosing a high-quality inverter for optimal efficiency and performance.
On the downside, their 5-year warranty (extendable at an additional cost) is less comprehensive compared to competitors who often offer longer standard warranties, potentially adding extra long-term costs for consumers.
7. Huawei SUN2000L1
The Huawei SUN2000-L1 series is a solar panel inverter particularly suited for residential applications. These solar inverters stand out with their ‘dual MPPTs’ and a wide operating voltage range of 120V to 600V, enhancing power generation efficiency. This series is a testament to Huawei's commitment to innovation and quality in the renewable energy sector, as the company is globally recognized for its expertise in telecommunications and electronics.
A key feature of the SUN2000-L1 inverters is their optimization capability, which is integrated into the inverter itself, unlike traditional systems that require separate optimizers. This innovation ensures that solar panels connected to the inverter are able to function efficiently, even in challenging conditions like shading or panel mismatch. Moreover, the SUN2000-L1 inverters are designed without cooling fans, relying on a smart natural cooling system for heat dissipation.
This design not only reduces noise but also increases power generation efficiency and reliability. Additionally, these inverters lack the typical LCD monitors, opting for Wi-Fi-based setup and monitoring, which reduces the chances of malfunction. What’s more, the SUN2000-L1 series has a compact and lightweight design, featuring three LED indicators and an integrated DC isolator.
Ranging from 2kW to 6kW and priced between $1000 and $1300, these solar inverters are available in both single and three-phase configurations. To enhance their value, an extended warranty option is offered at an additional cost, supplementing the standard ten-year warranty that comes with your Huawei solar inverter.
8. FIMER UNO DM PLUS
The FIMER UNO DM PLUS is an advanced single-phase inverter, an evolution of the renowned UNO series tailored for residential use. This model exemplifies the expertise associated with FIMER, an Italian brand known for its robust and innovative energy solutions, by incorporating these attributes into a lightweight, compact design suitable for installations with various orientations.
The UNO DM PLUS solar inverters range from 1.2kW to 6kW, and they boast a maximum efficiency of 97.4%, aligning with the typical residential inverter efficiency standards of 95% to 98%.
A key benefit of FIMER UNO DM PLUS solar panel inverters is its wireless communication, allowing quick, easy, and safe installation without opening the inverter's front cover. Additionally, they feature a dual Maximum Power Point Tracker for enhanced performance in a small footprint. However, a notable limitation is the restriction to oversize solar panel capacity by only about 2% based on the DC input rating. This is less than the 33% oversizing allowed by the Clean Energy Council guidelines, potentially needing a larger inverter for the same solar panel capacity compared to other brands.
In terms of monitoring, the inverter features embedded data logging and direct data transfer to the Internet via Ethernet or WLAN, enabling users to access the full Aurora Vision® remote monitoring experience. Should you have queries about this system or any other aspect of the product’s setup and use, FIMER offers accessible support services to assist customers at any time.
When it comes to costs, the pricing of the UNO DM PLUS varies and should be checked from current market sources, but expect to pay between $1000 and $1500. Upon purchase, the ASSURE Warranty Plans cover the UNO-DM Inverters for 10 years.
9. Sungrow SG Premium
The Sungrow SG Premium series, a residential line of solar inverters from Sungrow, reflects the company's commitment to renewable energy technology. As one of the world's leading solar inverter suppliers, Sungrow's Premium series, ranging from 2 kW to 8.8 MW, showcases an impressive efficiency of over 99%, demonstrating their capability to cater to varying scale needs in the solar energy sector.
Among the advantages of the Sungrow SG Premium series, these modern, transformerless inverters are designed for ease and efficiency, featuring a compact and lightweight build that facilitates easy portability. In addition, installation of these solar inverters is straightforward, thanks to their plug-and-play design. However, one potential downside is their lack of external cooling fans; they rely on passive cooling through a large rear heatsink, which often limits performance in high-temperature conditions.
In terms of specifications, the Sungrow SG5K-D model, for instance, offers a 5000-watt power capacity with a maximum DC voltage of 600 volts. This single-phase solar PV inverter is notable for its high-quality design and includes 2 MPPTs. The reliability and quality of these inverters are well-regarded in the industry, ensuring dependable performance over time.
Users remotely monitor the performance of their SG Premium inverter through standard WiFi connectivity, with access to the iSolarCloud portal, a cloud-based platform known for its user-friendly and efficient interface. What’s more, Sungrow ensures robust support with its comprehensive service, including on-site service, 24/7 after-sales support, online monitoring, and maintenance.
The pricing of the Sungrow SG Premium inverters varies and should be verified from market sources for accuracy, but they are currently found in the $1000-$1300 range. In a significant move, Sungrow announced in 2020 that it would cover some of its inverter models purchased then onward with a 10-year warranty, extending from the previous 5-year coverage.
10. Goodwe DNS Series
The GoodWe DNS Series, originating from GoodWe, a globally recognized solar inverter manufacturer based in China, is a line of 3-6KW single-phase on-grid solar inverters designed specifically for residential installations. Known for their innovation and quality in solar technology, GoodWe's DNS Series inverters stand out for their compact size, lightweight, and durability. They are an excellent home-use choice, combining a comprehensive hardware and software system. Additionally, the DNS series is compatible with high-power and bi-facial modules, enhancing solar power absorption and efficiency.
One of the key advantages of the GoodWe DNS inverters is their longevity and durability, meeting modern stringent standards. What’s more, they offer high efficiency and class-leading functionality, including IP65 dustproofing and waterproofing. Additionally, their fan-less, low-noise design contributes to a more pleasant home environment. On the downside, these solar panel inverters sometimes underperform in partially shaded conditions.
In terms of specifications, the GoodWe DNS series features a low start-up voltage of only 80V and a wide MPPT voltage range of 80-550 V, providing flexibility for household systems. They are IP65-rated, allowing for both indoor and outdoor mounting.
GoodWe inverters come with advanced features, enabling you to monitor energy production, consumption, and system status via a mobile app or web interface. This helps in effectively managing your solar system's performance. Moreover, GoodWe offers robust support, with a recent upgrade to its online support system in December 2023.
Priced between $600 to $800, these inverters are competitively priced. Plus, GoodWe provides an extended warranty for the DNS series in addition to the standard 5-year warranty, offering an additional 5 years for parts only. This means that, during the 5 to 10-year period, customers receive replacement parts for free but are responsible for delivery costs, labor, and any taxes or duties.
Why is it important to select the correct Solar Panel Inverter for Solar Panels?
Selecting the correct solar panel inverter for solar panels is crucial for several reasons, including efficiency optimization, system compatibility, and safety and reliability.
In terms of efficiency, the inverter is responsible for converting the direct current (DC) electricity generated by solar panels into alternating current (AC) electricity that is able to be used at home. The efficiency of this conversion process affects how much of the solar power is actually usable. A well-matched inverter ensures maximum efficiency. Choosing the right solar panel inverter is also a matter of compatibility. Solar panels and inverters must be compatible in terms of their voltage and power characteristics. When a solar inverter is not correctly matched to the solar panels, it results in poor system performance or damage to the equipment. What’s more, an appropriate inverter ensures the safety and reliability of your solar power system, protecting it against overloads, short circuits, and other electrical issues. Last, using the correct inverter prolongs the life of both the solar panels and the inverter itself. An inverter that is too small or too large for the solar panel setup often leads to increased wear and tear, reducing the lifespan of the system.
Where to purchase a Solar Panel Inverter for Solar Panels?
In the United States, there are several reputable places where customers purchase solar panel inverters for their solar panels, including The Home Depot, SolarEdge, and A1SolarStore. The Home Depot offers a range of solar inverters suitable for various applications such as cabins, RVs, backup power, and residential use. They have a variety of options, including pure sine wave inverters and inverters with different wattage capacities, which ensure compatibility with a wide range of solar panel setups. SolarEdge, on the other hand, specializes in residential inverters for homes. They provide advanced, smart energy managers in their inverters, which optimize the home’s energy flow, maximizing the amount of solar power produced, stored, and consumed. Last, A1SolarStore offers a broad selection of solar inverters, including models from well-known brands like SMA, SolarEdge, and Fronius. Their inventory includes various types of inverters, such as grid-tie inverters, hybrid inverters, and microinverters, catering to different solar power needs. They also offer free shipping on some models.
What is the most common Solar Panel Inverter for Solar Panels?
The most common type of solar panel inverter used in solar panel installations is the string inverter. String inverters are a type of solar inverter used in photovoltaic (PV) systems for converting the direct current (DC) output of a string of solar panels into alternating current (AC) electricity that’s fed into the power grid, used by the local electrical network, or in off-grid solar power systems. The defining characteristics and functionality of string inverters include the ability to be connected to multiple panels in a series to form a "string,” as well as centralized conversion, typically located at a convenient location near the power panel or on an exterior wall. This setup means all the DC power generated by the solar panels is sent to a single location for conversion to AC power.
String inverters have been the standard in the solar industry for many years. Their popularity is due to their reliability and simplicity, and their cost-effectiveness: String inverters are generally cheaper than other types of inverters like microinverters or power optimizers. This affordability makes them an attractive option for both residential and commercial solar installations. In addition, string inverters are relatively straightforward to install and maintain. This simplicity reduces the complexity of solar installations, making them a preferred choice for many installers and homeowners.
What is the Cheapest Solar Panel Inverter available?
One of the cheapest solar panel inverters available is the ENPHASE IQ7 Microinverter (Model # IQ7-60-2-US). Launched in 2018, this microinverter is priced at approximately $120. The main reason why the ENPHASE IQ7 is so cost-effective is that this model is installed on each solar panel, handling the output of that specific panel. While this microinverter represents a budget-friendly option, it's essential to consider that the total cost of an inverter system will vary depending on the size and requirements of your solar panel setup.
What is the most expensive Solar Panel Inverter available?
Microinverters are generally the most expensive type of solar panel inverters on the market, and their high cost is attributed to several advanced features they possess. These features include detailed, panel-level monitoring and control, a significantly longer lifespan (usually over 25 years), and the ability to offer detailed data about the performance of each individual solar panel. These capabilities significantly enhance the efficiency and functionality of a solar panel system but also contribute to a higher price compared to other types of inverters, such as string inverters or hybrid inverters.
To illustrate, Enphase Energy's range of advanced microinverters includes models like the IQ8A-72-2-US, IQ8M-72-2-US, and IQ8PLUS-72-2-US. For a 5kW solar system, the cost of incorporating these microinverters ranges from approximately $8,000 to over $14,000. This pricing reflects their advanced technology and the added value they bring to a solar energy system.
When choosing a solar panel inverter, it's crucial to consider the balance between the initial cost and the long-term benefits. Microinverters, despite being the most expensive option, provide significant advantages in terms of performance and monitoring capabilities. These benefits make them a worthwhile investment for many homeowners, especially those who prioritize system efficiency, longevity, and detailed performance monitoring.
Is it easy to install a Solar Panel Inverter for Solar Panels?
No, installing a solar panel inverter is a complex process that typically requires professional skills. Firstly, you need to choose the right inverter that matches the wattage and voltage of your solar panels. Next, the installation involves electrical work, including connecting the inverter to the solar panels and to your home's electrical system. When it comes to solar inverter installation, safety is paramount, as one single mistake can cause electrical damage to your solar energy system. While it's possible for those with electrical experience to do it themselves, for most homeowners, hiring a qualified technician is recommended to ensure proper and safe installation.
Can a Solar Panel System work without a Solar Panel inverter?
No, a solar panel system cannot function effectively without a solar panel inverter. Solar panels generate direct current (DC) electricity, while most homes and appliances utilize alternating current (AC) electricity. The role of the solar panel inverter is to convert the DC electricity from the solar panels into AC electricity that is compatible with household use or for feeding into the electricity grid. Without an inverter, the DC electricity produced by the solar panels would not be suitable for most home electrical systems and appliances
What is the difference between a regular Solar Panel Inverter and a Hybrid Inverter?
The main difference between a regular solar panel inverter and a hybrid inverter is that a hybrid inverter is compatible with solar battery storage. Hybrid inverters not only convert Direct Current (DC) to Alternating Current (AC) like a regular inverter, but they also convert in the opposite direction (AC to DC) for use with batteries. Regular solar inverters are primarily one-way devices, converting DC electricity from solar panels into AC electricity. In contrast, hybrid inverters support bi-directional power flow, allowing them to not only convert solar power to usable AC electricity but also manage power flow back into storage solutions or the grid.
Additionally, hybrid solar inverters offer more operational independence and energy storage capabilities. Unlike standard inverters, hybrid inverters can operate independently without the need for an external charge controller.