Installation and positioning
100
112
105
92
108
850
900
1000
1000
1000
1050
1050
900
900
950
950
950
800
800
850
88
1200
South
The diagram above shows insolation as a percentage of
global radiant flux in relation to surfaces at various ori-
entations and angles.
The map shows lines with the same global radiant flux,
i.e. the insolation measured at horizontal surfaces.
Source: SMHI.
Using the diagram and the map, one can estimate the
annual value of the solar radiation falling on those sur-
faces where the solar panels are located.
100% is the insolation at a horizontal surface, which in
southern Sweden is between 900 and 1050
kWh/m²/year. The angle of inclined surfaces is 45°.
1. Calculate the annual solar radiation using the map.
The specific solar radiation for the installation is ob-
tained as a percentage, based on the location of the
solar panel according to the diagram.
2. Multiply the result by the installation's peak output
(3.12, 5.72, 9.36 kW).
3. Multiply the result 2 by a constant 0.9 to calculate
the energy production in kWh/year (with a reserva-
tion for shade, dirt and snow coverage).
Example: Visby, 45°, installation south.
1050 x (112/100) x 3.12 x 0.9 = 3302 kWh/year
PV Solar package
Chapter 3 |
Installation
8
Содержание PV 3031
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