SOWITEC, a wind and solar project developer based in Sonnenbühl, filed for insolvency with the Tübingen Local Court on July 14, 2026. The filing affects the parent company as well as three other group subsidiaries. The company is insolvent and over-indebted under insolvency law. Negotiations regarding supplier claims and demands arising from surety bonds had previously failed. Consequently, the stock exchange suspended trading in both of the company’s corporate bonds. The insolvency also affects employees, investors, and ongoing energy projects.
Failed deferral forces SOWITEC to file for insolvency
Management described the move as “inevitable.” They were unable to prevent claims being enforced by a supplier and under guarantees. Furthermore, no agreement was reached to defer due obligations. However, operations are set to continue for the time being following the appointment of a preliminary insolvency administrator.
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According to Managing Director Frank Hummel, payments from Mexico and Colombia in the high single-digit million range are outstanding. SOWITEC had factored these revenues into its plans months in advance, SWR reported. Furthermore, the wind energy market in southern Germany is complicating the implementation of new projects; topography and infrastructure there drive up costs—for instance, when transporting large turbine components.
Financial issues were already evident in the bonds
Liquidity problems had become apparent well before the insolvency filing. In May, the joint representative deferred €1.53 million of a scheduled partial repayment until September 25, with the company required to pay only €763,400 by the original deadline. Creditors had previously extended the maturity of the older bond by three years—to November 2026—back in 2023.
The interest payment for the 2023/2028 bond was also delayed in late March 2026. Consequently, the prices of both securities plummeted following the insolvency announcement. ECOreporter cited trading prices at five and ten percent of face value. The Frankfurt Stock Exchange subsequently suspended trading in both bonds.
Ongoing wind projects hinge on insolvency proceedings
Founded in 1993, the company develops wind and solar farms from the planning stage through to commissioning. It also handles financing, construction coordination, and, in some cases, subsequent operation. As recently as June, SOWITEC sold the Creußen III wind farm to Stadtwerke Stuttgart. The project developer is still slated to complete the 14.4-megawatt wind farm on a turnkey basis by December 2027.
However, it is not yet known which contracts and projects the provisional insolvency administrator will continue. Management anticipates normal operations for an initial period of three to six months. During this time, wages are expected to be secured through insolvency benefits. Long-term continuation therefore depends on the insolvency administrator’s assessment and potential restructuring solutions.
Author: Blackout News
Sources: EQS (14.07.26) – SWR (14.07.26) – Deutsche Börse (14.07.26) – ECOreporter (14.07.26)