We are going to build a PV system on a roof of 10m2, and we have two possible PV modules:
(1) A first generation module with efficiency η=18% and cost of 0.80€/Wp.
(2) A second generation PV module with efficiency η=10% and cost of 0.40€/Wp.
The non-modular costs are 100€/m2.
Note that the irradiance under standard test conditions is 1000W/m2.
What is the cost in € of implementing a PV system for the entire roof using first generation technologies?