Installation of AC and DC (direct connect) solar systems and sale of solar systems as well as scaffolding construction. May establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, and conduct all business that is directly or indirectly related to its purpose, as well as acquire, encumber, sell and manage real estate in Switzerland and abroad, arrange financing for its own account or for third-party account, and provide guarantees and sureties for subsidiaries and third parties.