Example PV System not simulating in OpenModelica

[FWuellhorst]

Describe the bug
The modelExamplePVSystem fails in OpenModelica.

Error log

 Error in model:  AixLib.Electrical.PVSystem.Examples.ExamplePVSystem 
Simulation execution failed for model: AixLib.Electrical.PVSystem.Examples.ExamplePVSystem
LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
assert            | debug   | AixLib.Electrical.PVSystem.Examples.ExamplePVSystem.c:1559: Invalid root: (-26.5949)^(1.634)
stdout            | warning | Integrator attempt to handle a problem with a called assert.
assert            | debug   | AixLib.Electrical.PVSystem.Examples.ExamplePVSystem.c:1559: Invalid root: (-26.7)^(1.634)
stdout            | info    | model terminate | Simulation terminated by an assert at time: 157680