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U. Muntwyler
6. The appearance of the PV field on a roof or on a façade.
In grid-connected PV systems, on buildings, one attempts to cover the whole
surface of the roof or of the façade.
On the other hand, for economic reasons, there is a tendency to reduce the size of
the PV plant, so as to obtain maximum “self-consumption”. This leads to smaller PV
installations; and per kW p , to more expensive PV installations. Indeed, roofs should
be covered fully on their surface with PV, giving, thus, maximum power and the
lowest kWh/kW p price.
Best orientations in the Northern hemisphere are south- and east-west—installations. In the Southern hemisphere it turns to north- and east-west installations. For
flat inclined roofs in the Northern hemisphere north roofs are also an option. The
same is for the Southern hemisphere, where south roofs for flat inclined roofs can
be considered too.
12.5 Explanation of Symbols
Symbol
Name
PV module
DC to DC converter
Inverter DC to AC
Fuse
G
Generator
U. Muntwyler
6. The appearance of the PV field on a roof or on a façade.
In grid-connected PV systems, on buildings, one attempts to cover the whole
surface of the roof or of the façade.
On the other hand, for economic reasons, there is a tendency to reduce the size of
the PV plant, so as to obtain maximum “self-consumption”. This leads to smaller PV
installations; and per kW p , to more expensive PV installations. Indeed, roofs should
be covered fully on their surface with PV, giving, thus, maximum power and the
lowest kWh/kW p price.
Best orientations in the Northern hemisphere are south- and east-west—installations. In the Southern hemisphere it turns to north- and east-west installations. For
flat inclined roofs in the Northern hemisphere north roofs are also an option. The
same is for the Southern hemisphere, where south roofs for flat inclined roofs can
be considered too.
12.5 Explanation of Symbols
Symbol
Name
PV module
DC to DC converter
Inverter DC to AC
Fuse
G
Generator