After considering to do it by myself or through a contractor, I made the decission to make self my solar cell installation from about 5-5.5 Kwh.
Some items are easy to find, like batterys, I make choice for the lipo4 cells, with a total voltage of 48V with a current of 240Ah.
Also I made choice for the inverter from Goodwe, model GW5048D-ES, I like to make a hybrid system connected to the grid.
But about the solar panels it is more complicated, initially i wanted to use the Longi 450W type, but today i see, there are already 530W models from Longi.
Only, there are available