Silicon-based solar cells Characteristics and production processes ...

Silicon-based solar cells – characteristics and production processes
Year
50
45
40
35
30
25
20
15
10
5
0
20 25
30 35 40 45 50
Energy price [c/kWh]
4 $/W
6 $/W
8 $/w
10 $/W
Fig. 45. Time of the refunding of the costs incurred for a PV system purchase, depending on
the initial price of 1 W p of the system power and the price of the electric energy produced by
the system and treated as final product; calculations made with the assumption of a 5-hour
system illumination and the interest rate of 5 % [7].
Year
50
45
40
35
30
25
20
15
10
5
0
20 25
30 35 40 45 50
Energy price [c/kWh]
0 %
2,5 %
5,0 %
7,5 %
Fig. 46. Time of the refunding of the costs for a PV system depending on the market interest
rate and the price of the electric energy produced by the system and treated as final
product; calculations made with the assumption of a 5-hour system illumination and the
price of the PV system installation equaling 8 $/1 W p [7].
As it can be inferred from the dependences presented above, with the
adequately low interest rate and with the price of the electric energy at the level of
20 cents per 1 kWh, the refunding of the costs incurred for the PV system installation
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