Simple Solar Energy Question

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=17% 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.

Assume that the rooftop enjoys an irradiance of 1000W/m2.

1. What is the cost in € of implementing a PV system for the entire roof using first generation technologies?

2. What is the cost in € of implementing a PV system for the entire roof using second generation technologies?

3. If the power demand is 700Wp, which will be the most cost effective option? (Note that for meeting the power demand, you may not need the whole roof area.)

First generation technologies or
Second generation technologies or
Both options have the same cost

Naragani, the solution is found using algebra. Can you post the answers?

Total cost = PV module costs + Non modular costs

If you are doing the solar energy course, maybe you can contact me by email and perhaps we can work together.

Gabriella.angelin(_at_)gmail.com

I don't see where the efficiency factors set in...

Efficiency doesnt factor, your right.