Polysun Simulation Software Community

In the template 44c whatever change i make in the system the demand is not met. I have tried increasing the power of the District Heating, Increase Solar Thermal surface, Increase tank size, Increase pump size and heat exchanger size. In all cases i get back the same graphs for energy to the system ...

In one of our systems we have a distrcit heating and we have a huge domestic hot water demand. Whatever changes we make the issues is not fixed. Is it possible that the specific system will never be enough no matter what we do? We also tries to put a second water tank and it says its too compicated ...