Hi @aMUSEd ,
I read about this persistence some time ago, and of course it would be the correct one to use for the aWATTar binding now as it is available. However, I am not sure about the future of the aWATTar binding at all. There is a far more general solution available with the Entso-E binding, so I think on the long run it will be a successor of the aWATTar binding. This binding also seems not to use the TimeSeries persistence yet, but making it available there would provide a solution for many european energy markets instead of only Austria and Germany. So if I have spare time I think I will use it to assist there instead of further maintaining the aWATTar binding.