How many bitcoin can I mine with one Antminer s9?

Hello guys, I have some money to invest and 6kW of free energy with solar panel. First of all I want to tell you that I'm learning about mining only from a few days so I'm very very noob. I'm also not a native speaker so please be very easy with the answers, thanks.

I'm thinking to buy an antminer s9, I found one at 2.100€ (2.450$). The problem is that I read discordant information about the production of bitcoin with this machine. I just want to know how can I mine per mounth with the antminer s9 in a mining pool. Someone can help me?

Submitted August 09, 2017 at 11:18AM by Sventrapinguini
via reddit