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The German photovoltaic industry is based on policies and driven by technology, becoming a benchmark for global energy transformation.
The historical position of the German photovoltaic industry is indisputable, ranking first in global installed capacity from 2004 to 2013, and fourth in the world with 14.9GW of new installed capacity in 2023. Its technical standards and business model continue to be output, and inverters and energy storage management systems occupy 35% of the global high-end market share.
The contribution of emission reduction is also significant, with photovoltaic power generation system reducing 4.2 million tons of CO ₂ emissions by 2023, supporting renewable energy generation to account for 60%. Innovative paths such as agricultural photovoltaics and virtual power plants provide replicable transformation experiences for the world, but supply chain autonomy and grid resilience remain key tests for maintaining its leadership position.
In this article, the top 6 solar inverter companies in Germany in 2025 will be introduced, from basic information to latest news about these companies.
Top 6 solar inverter companies in German in 2025
As of the end of 2024, the total installed capacity of photovoltaics in Germany has exceeded 100GW, an increase of 21% compared to 2023. Among them, distributed roof systems account for up to 85%, and small-scale solutions such as balcony photovoltaics are rapidly becoming popular. By 2024, two-thirds of the newly installed building photovoltaics will be added. The market is driven by industrial, commercial, and household demand, and the self use rate of household scenarios has increased to over 60%.
Ground power stations have simultaneously increased their installed capacity by 6.3GW, a year-on-year increase of 40%. But after the proportion of photovoltaic power generation increased to 14%, the pressure on power grid consumption intensified. The negative electricity price period reached 459 hours throughout the year, with 79% concentrated in the midday when there was sufficient sunlight. This contradiction reveals the urgent need for fluctuating power sources and grid upgrades.
The following is the list of the top 6 solar inverter companies in Germany in 2025 for you to know better about the solar inverter market in German.
|
Ranking |
Company |
|
1 |
SMA |
|
2 |
KACO new energy |
|
3 |
KOSTAL Solar Electric |
|
4 |
Kontron Solar GmbH |
|
5 |
Siemens Energy |
|
6 |
SolarInvert |
SMA
| Company website | https://www.sma-america.com/ |
| Founded | 1981 |
| Company headquarter | North Hesse, Germany |
Company overview
SMA is a well-known brand in the field of solar photovoltaic system technology and is one of the top 6 solar inverter companies in Germany. This leading German solar equipment supplier is transitioning towards decentralized and self-sufficient renewable energy supply. SMA provides a variety of inverters for various applications, from small residential systems, commercial systems to independent power grids. Whether it is a private residence or a large commercial factory, inverters are customizable, fast, and easy to install.
Main products
SMA products cover inverters for household, commercial solar inverter, and ground power stations.
Company updates
German inverter giant SMA has released a heavyweight new product, Sunny Central Storage UP-S Energy Storage PCS, which is applied to large-scale energy storage solutions on the source grid side. The new product has achieved excellent power conversion system efficiency and networking capability. This technology not only significantly reduces heat load, but also ensures that it can still operate at full power during network construction operations.
KACO new energy
| Company website | https://kaco-newenergy.com/home/ |
| Founded | 1999 |
| Company headquarter | Baden-W ü rttemberg, Germany |
Company overview
KACO New Energy is a German supplier of photovoltaic inverters and energy storage solutions, with an annual revenue of approximately $320 million, and is one of the top 6 solar inverter companies in Germany. The company mainly operates a series of products including photovoltaic inverters, energy storage systems, photovoltaic power generation systems, energy management systems, and related electrical components, and conducts business through a global business network and online platforms.
Main products
Featuring high-efficiency transformerless Blue Star series inverters, multiple new products and hybrid system solutions will be released in April and October 2024, respectively.
Company updates
KACO New Energy has launched a new hybrid inverter suitable for residential and small commercial rooftop photovoltaic systems, with a power of 6-12 kW and an efficiency of up to 91.9%.
KOSTAL Solar Electric
| Company website | https://www.kostal-solar-electric.com/en-gb/ |
| Founded | 2006 |
| Company headquarter | Freiburg, Germany |
Company overview
KOSTAL Solar Electric is a power electronics equipment supplier for private and commercial solar photovoltaic systems, and also one of the top 6 solar inverter companies in Germany. KOSTAL Solar Electric offers a full range of products, with inverter power ranging from 3-100kW.
Main products
In addition to inverters, the product portfolio also includes wall mounted boxes, energy meters, and planning and monitoring software.
Company updates
The new generation hybrid inverter PLENTICORE G3 M 10 from KOSTAL Solar Electric breaks the industry record with a charging efficiency of 98.2%. It adopts silicon carbide power module technology and is designed specifically for high-power photovoltaic systems.
Siemens Energy
| Company website | https://www.siemens-energy.com/global/en/home.html |
| Founded | 2019 |
| Company headquarter | Berlin, Germany |
Company overview
Siemens Energy, as a global leader in energy technology, one of the top 6 solar inverter companies in Germany, Siemens' business covers the globe, focusing on intelligent infrastructure serving buildings and distributed energy systems, as well as automation and digitization for process industries and manufacturing.
Main products
Transformers, high-voltage direct current transmission systems, renewable energy technologies, digital energy management platforms, energy storage solutions (such as Power-to-X technology, which converts electrical energy into hydrogen or other forms of energy).
Company updates
Starting from the first quarter of 2025, 1000 inverters will be deployed in Summit Ridge's projects in Illinois and Virginia. Siemens will produce inverters at its recently put into operation factory in Wisconsin, USA.
Kontron Solar GmbH
| Company website | https://www.kontron-solar.com/ |
| Founded | 2018 |
| Company headquarter | Munich, Germany |
Company overview
Kontron Solar GmbH is now a part of Kontron AG as of 2024, and one of the top 6 solar inverter companies in Germany. The company specializes in high-end power electronics, including grid inverters, energy storage systems, and control technology for photovoltaic and fuel cell systems. It offers solutions for both grid-connected and stand-alone solar power systems, ensuring high performance and low costs through their innovative Steca inverters and accessories.
Main products
Kontron Solar provides a range of products designed to meet various energy needs, from small residential solar setups to complex industrial systems. Their product line includes solar charge controllers, sine wave inverters, system monitoring tools, and accessories.
SolarInvert
| Company website | https://www.solarinvert.de/ |
| Founded | 1995 |
| Company headquarter | Germany |
Company overview
SolarInvert GmbH is a holding company with a long history. The production foundation of inverters was laid as early as 1995 at ZSW (Solar and Hydrogen Research Center) in Stuttgart. Over the past 25 years, the SolarInvert GmbH team has primarily operated in the context of large corporations, and is now one of the top 6 solar inverter companies in Germany.
Main products
SELVsolar Plug In PV, SELV inverter, solar module Company updates SolarInvert GmbH is launching four DIY kits that are easy to install and safe starting today. 6 modules (1.71 kWp), 8 modules (2.28 kWp), 10 modules (2.85 kWp), and 12 modules (3.42 kWp) are available for selection.
Conclusion
The German photovoltaic industry chain presents a "dumbbell shaped" feature, with upstream silicon materials and module manufacturing highly dependent on imports, and only 2.3% of module production capacity retained locally. Enterprises such as Wacker Chemie support local competitiveness, but the 10GW local manufacturing revival plan faces cost suppression from 80% of China's global production capacity.
The advantages in the middle and lower reaches are significant, with SMA inverters occupying 35% of the global high-end market share and Sunny Boy series having a failure rate of less than 0.5%. System integrators such as BELELECTIC have compressed the installation cycle of small projects to 6 weeks, resulting in a 300% increase in efficiency compared to the European average. The output of smart grid technology has become the core lever for Germany to consolidate its global position.
Top 6 solar inverter companies in Germany still need to strive to maintain their high-end market advantage through technological barriers. But the leading value of 4.2% R&D investment intensity still needs to be transformed into the ability to reduce costs on the manufacturing side in order to solve the imbalance dilemma of the "dumbbell shaped" industrial chain.
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