I made a back of the envelope calculation and crunched some number to better understand the comparative cost situation of the power plant.
According to Wiki, for 15 years, we are obliged to buy 70% of the electricity produced by the first two reactors and 30% of the electricity produced by the last two reactors. So it's half of the powerplant's produce.
The annual electricity production will be 35 billion kWh. We will buy at least half of it, 17.5 billion kWh per year at a fixed price of $12.35 cents per kWh.
It will cost us
17.5 billions kWh x $0.1235 x 15 years = $32.4 billions. 


This number is what we'll be in total in the span of 15 years.
For comparison with grid-scale solar;
The levelized cost of electricity for solar is $3.5 cents per kWh in 2025. This is expected to fall to $2.5 cents in 2035. Since we're making calculations for 15 years we should use the cost of 2032-2033, which we can extrapolate to find at $2.7 cents per kWh.
The total cost equivalent to Akkuyu Nuclear Plant's production in 15 years;
17.5 billions kWh x $0.027 x 15 years = $ 7.09 billions 

Even if we included on-site battery storage into the equation it wouldn't even cross the half of what Akkuyu costs us. We would make both panels and the batteries in the country. Attracting the battery makers into producing locally would be easy considering we're throwing billions at them. It offers more grid stability as it can be ramped up and down pretty quickly as opposed to a nuclear power plant. And most importantly, and i cannot emphasize this enough, we would have no nuclear powerplant within our borders, owned and operated by fucking Russians.
So we've been shafted. We've been shafted alright.
Note: Levelized cost of electricity means it includes both the production and the operating costs of the power-plant over its lifetime.