I want to add electricity demand and renewables production in hourly scale wich means that I have 8760 data record for both.
I do not recommend trying to use 8760 hourly time slices. On most computers that will be very memory intensive and very slow. It may even lead to out-of-memory errors ((and almost certainly when using the 32-bit version of LEAP). I would recommend using a smaller number of time slices (e.g. 4 seasons x 24 hours). You can then create yearly shapes and import data that is in the form of 8760 hourly values.