API pv data unit/ Country-level data/ API for different location

Dear Renewables.ninja community,

I have some beginner questions so I hope for your help.

Question 1:
I used the API with your proposed python code for pv data. it works but I was wondering in wich unit are the electricity data given ?
I though it might be in W and not in kW as in CSV data if I use the normal way to download the data from the web.

Question 2:
I would to use the API to read the pv data of a list of different location for a sensitivity analysis using python is that possible ? I still be a beginner in programming generally that’s why I’asking that.

Question 3:
what kind of data are contained in the Country-level data, electricity, wind temperature ?

thank you very much.