Solar Energy Systems 01.09.2009
Page
38
Mounting Directions for In-Roof Photovoltaic Systems
Ernst Schweizer AG, Metallbau, CH-8908 Hedingen, T41 44 763 61 11, T41 44 763 61 19, www.schweizer-metallbau.ch
2
PE 16 mm² Cu
1
GND
4
6 mm² Cu
5
3
Image 4-25: Recommended potential equalization
1 Grounding 16 mm² Cu
4
Solrif
®
module
2 String cable to the inverter
5
Potential equalization 6 mm² Cu at the modules
3 Ridge
flashings
Lightning and Overvoltage Protection
CAUTION
Damage due to faulty lightning and overvoltage protection!
Damage to the photovoltaic module array, to the inverter and the building due to faulty exterior or interior lightning
protection is possible.
Properly installed lightning protection in accordance with VDE 0185-305 / DIN EN 62305 prevents damage
due to overvoltage.
TIP
Lightning or overvoltage protection may be necessary instead of potential equalization:
Neglected safety distance between photovoltaic generator and lightning protection system.
On public buildings.
Bonding the photovoltaic generator to the exterior lightning protection system of the building.
Establish interior lightning protection as AC/DC overvoltage protection.
Observance of relative national and perhaps regional regulations.
