Planning the Installation
PV Array Requirements
WARNING: Shock hazard
Whenever a PV array is exposed to sunlight, a shock hazard exists at the output wires or exposed terminals. To reduce the risk of shock during installation, cover the array with an opaque (dark) material before making any connections.
General Recommendations
It is important that the PV array is installed correctly to the manufacturer’s specifications and to local code requirements.
For general recommendations on PV array installation, the CEC Guide to
Photovoltaic System Design and Installation document referenced in “Related
Information” on page v is recommended. It is available at www.energy.ca.gov.
Equipment and Installation Recommendations
| The following PV array equipment and installation recommendations are taken | |
| from the CEC Guide to Photovoltaic System Design and Installation document | |
| referred to above. | |
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| Important: The PV array should be free of shade between 9:00 AM and 4:00 PM. This | |
| requirement includes even small obstructions such as vent pipes, chimneys and power | |
| lines. A small amount of shade can have a disproportionately high impact on system | |
| performance. | |
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Equipment | • All electrical equipment should be listed for the voltage and current ratings | |
recommendations | necessary for the application. | |
| • All wiring should be sized correctly to minimize voltage drop. | |
| • All exposed wires or conduits should be sunlight resistant. | |
| • All required overcurrent protections should be included in the system and | |
| accessible for maintenance. | |
| • Depending on the installation, an external disconnect may be required if the | |
| inverter is installed in a location not easily accessible to utility or fire | |
| personnel. Consult local authorities for additional information. | |
| • Integral roofing products should be properly rated. | |
Installation | • All electrical terminations should be fully tightened, secured, and strain | |
recommendations | relieved as appropriate. | |
| • All mounting equipment should be installed according to the manufacturer’s | |
| specifications. | |
| • All roof penetrations should be sealed with an acceptable sealing method that | |
| does not adversely impact the roof warranty. | |
| • All wires, conduit, exposed conductors and electrical boxes should be secured | |
| and supported according to code requirements. | |
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