World Library  
Flag as Inappropriate
Email this Article

Solar cable

Article Id: WHEBN0032161246
Reproduction Date:

Title: Solar cable  
Author: World Heritage Encyclopedia
Language: English
Subject: Rooftop photovoltaic power station, Photovoltaic system, Photovoltaics, Grid-connected photovoltaic power system, Nominal power (photovoltaic)
Publisher: World Heritage Encyclopedia

Solar cable

Solar cable is the interconnection cable used in photovoltaic power generation. A solar cable interconnects solar panels and other electrical components of a photovoltaic system. Solar cables are designed to be UV resistant and weather resistant. It can be used within a large temperature range and are generally laid outside.


One common factor for most of the photovoltaic power systems is outdoor use, characterized by high temperatures and high UV radiation. Single-core cables with a maximum permissible DC voltage of 1.8 kV and a temperature range from -40°C to +90°C are generally used. A three-core AC cable is used for connection to the grid if a single-phase inverter is used, and a five-core cable is used for three-phase feed-in.[1]


The cable's insulation must be able to withstand thermal and mechanical loads. As a consequence, plastics which have been cross-linked using an electron beam are increasingly used today. The insulation and jacket materials are extremely resistant to weathering, UV-radiation and abrasion. Additionally, it is salt water resistant and resistant to acids and alkaline solutions. It is suitable for fixed installation as well as for moving applications without tensile load. It is especially designed for outdoor use, which means direct sun radiation and air humidity, but due to the halogen free flame retardant cross-linked jacket material the cable can also be installed in dry and humid conditions indoors.[2]

DC connection

Individual modules are connected using cables to form the PV generator. The module cables are connected into a string which leads into the generator junction box, and a main DC cable connects the generator junction box to the inverter. In order to eliminate the risk of ground faults and short circuits, the positive and negative cables, each with double insulation, are laid separately.

Loss minimization

The cross-section of the cables should be proportioned such that losses incurred in nominal operation do not exceed 1%. String cables usually have a cross-section of four to six square millimeters.

UL4703 standard

In 2005 the American Underwriters Laboratories (UL) published the UL subject 4703 Photovoltaic Wire. It covers singleconductor, insulated and integrally or non-integrally jacketed, sunlight resistant, photovoltaic wire in several temperature and voltage ratings for interconnection wiring of grounded and ungrounded photovoltaic power systems. The standard UL 4703 is based on the service entry cords USE-2 and specifies some additional requirements for photovoltaic cables. It applies for solar cables in North America.

See also


  1. ^ "Inverter and PV System Technology - Cables and Connectors". Retrieved 2011-06-20. 
  2. ^ "Cables for Photovoltaic Applications". Retrieved 2011-06-20. 

Further reading

  • Sonnenenergie, Deutsche Gesellschaft für (2008). Planning and installing photovoltaic systems: a guide for installers. Earthscan.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.