In our IDAF we deal with the topic of solar (solar energy).
Initial situation / Given:
1 Photovoltaik Paneele = 300 Watt
n= 8 PV (Anzahl Paneelen)
Roof side: south
Daytime sun summer: t = 15h ∅
Efficiency (Wirkungsgrad): 65%
Daytime sun winter: t = 9h ∅
Efficiency (Wirkungsgrad): 45%
Calculation: W = p x t
Summer:
8 x 300 W = 2400 W
2400W /1000 = 2.4 kW
2.4 kW x 15h = 36 kWh
36kWh / 100 x 65 = 23.4 kWh
monthly: W x 30d
23.4 kWh x 30 = 702 kWh
costs: K = k x W
0.16 x 702 kWh = 112.32 ~ CHF 112.30
Winter: W = p x t
8 x 300 W = 2400 W
2400 W / 1000 = 2.4 kW
2.4 kW x 9h = 21.6 kW
21.6 kW / 100 x 45 = 9.72 kWh
monthly: W x 30d
9.72 kW x 30 = 291.6 kWh
costs: K = k x W
0.16 x 291.6 kWh = CHF 46.65
Consumption average household per year:
Power / current consumption: 15'000 kWh
Costs: CHF 2'500 -> 208.30 per month
Saving costs per month:
Summer:
208.30 - 112.30 = CHF 96
Winter:
208.30 - 46.65 = CHF 161.65