2010

German Workplace Investor Prize

Great Place to Work®: TOP 5 Best Workplaces in Europe, "Companies with more than 500 Employees" category

1st prize Energy Efficiency Award 2010 for the world's largest and CO2-neutral inverter plant

Great Place to Work®: TOP 5 Best Workplaces in Germany, "Companies with 501 to 5,000 Employees" category and special prize for "Lifelong Learning"

2009 

Hesse Champions, 1st Place in "Job Driver" category

Great Place to Work®: TOP 10 Best Workplaces in Europe, "Companies with more than 500 Employees" category and special prize for fair remuneration

Top Employer, Engineers

Great Place to Work®: TOP 10 Best Workplaces in Germany, "Companies with 501 to 5,000 Employees" category and special prize for "Lifelong Learning"

2008

German Fairness Prize 2008

Great Place to Work® Europe: the Top 10 best employers in Europe in the category "Companies with more than 500 employees"

Great Place to Work®: the Top 5 best employers in Europe in the category "Companies with 501 to 5000 employees"

2007

European Solar Prize in the category "Industrial Enterprises"

2006

Winner of "Entrepeneur 2006 - Industrial Category", nomination for "World Entrepeneur of the Year 2007"

Great Place to Work® Europe: the Top 5 best employers in the category "Companies with more than 1000 employees", and a special prize for "Best Practices for Involvement of Employees in Corporate Social Responsibility Activities"

Second place in "Great Place to Work" category: "Companies with 501 to 5000 employees" and the special prize for "Lifelong Learning"

2005

Prize for Innovation (an award from the SPD)

2004

Finalist, "Entrepeneur of the Year"

2002

Hidden Champion (award from the Hesse state government), 2002: Finalist, "Entrepeneur of the Year"

2000

Grand Prize for medium-sized businesse