{"id":12130,"date":"2025-04-30T09:07:19","date_gmt":"2025-04-30T07:07:19","guid":{"rendered":"https:\/\/www.kbe-elektrotechnik.com\/?post_type=ratgeber&#038;p=12130"},"modified":"2025-07-10T11:55:00","modified_gmt":"2025-07-10T09:55:00","slug":"installation-of-solar-cables","status":"publish","type":"ratgeber","link":"https:\/\/www.kbe-elektrotechnik.com\/en\/ratgeber\/installation-of-solar-cables\/","title":{"rendered":"The correct installation of solar cables"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Why correct installation is important!<\/h2>\n\n\n\n<p>In a PV system, solar cables are designed to transfer energy from the solar modules to the inverter. If their functionality is negatively affected by <strong>incorrect installation<\/strong>, this will directly impact the PV system's performance. In the worst case, the <strong>system may have to be shut down<\/strong>.<\/p>\n\n\n\n<p>There are other reasons why correct installation of solar cables is important:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Compliance with standards and regulations<\/h3>\n\n\n\n<p>Only with correctly installed solar cables will the PV system comply with applicable regulations (e.g., DIN VDE 0100, IEC 60364) and be <strong>successfully accepted<\/strong> at the end of installation. This is crucial for obtaining <strong>full insurance coverage<\/strong>.<\/p>\n\n\n\n<p><strong>Tip:<\/strong> <a href=\"https:\/\/www.kbe-elektrotechnik.com\/en\/products\/solar-cables\/\">KBE solar cables<\/a> are <strong>triple-certified<\/strong> according to the European standard <strong>EN 50618<\/strong> (H1Z2Z2-K), the international solar cable standard <strong>IEC 62930<\/strong> (IEC 131), and the standard <strong>2Pfg 1169 \/10.2019<\/strong> (PV 1500-K).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ensure safety<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fire protection:<\/strong> Faulty or improperly installed cables can cause overheating or short circuits, which in the worst case can lead to a fire.<\/li>\n\n\n\n<li><strong>Protection against electric shock:<\/strong> Proper installation prevents cables from being damaged and dangerous voltages from being released.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Get full performance<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Minimize power losses:<\/strong> Correct cable cross-sections and short cable runs reduce resistance losses. This allows more energy to be fed into the grid.<\/li>\n\n\n\n<li><strong>Prevent voltage drops:<\/strong> Optimal installation prevents voltage drops, allowing the system to run efficiently.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Maintain weather resistance and longevity<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>UV and weather protection:<\/strong> Solar cables are often exposed to direct sunlight. Improper installation causes them to become brittle more quickly.<\/li>\n\n\n\n<li><strong>Mechanical protection:<\/strong> Failure to protect solar cables from animals (e.g., rodents) and external influences can result in damage and performance losses to the PV system.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Easier maintenance and troubleshooting<\/h3>\n\n\n\n<p>A clean, well-thought-out installation facilitates subsequent inspections and repairs, <strong>saving time and money.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"684\" src=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-1024x684.jpg\" alt=\"Nahaufnahme von elektrischen Kabeln und Anschl\u00fcssen, die an der Unterseite einer Solarpanelanlage angebracht sind.\" class=\"wp-image-12038\" style=\"aspect-ratio:16\/9;object-fit:cover\" srcset=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-1024x684.jpg 1024w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-350x234.jpg 350w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-768x513.jpg 768w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-1536x1025.jpg 1536w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-2048x1367.jpg 2048w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-unter-Anlage-scaled.jpg 2560w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Before laying: select the correct cable length!<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>To minimize power losses, cable runs should be kept as short as possible.<\/li>\n\n\n\n<li>Cables should not be laid too tightly.<\/li>\n\n\n\n<li>Legal regulations regarding fire protection and the safety of electrical installations must be observed.<\/li>\n<\/ul>\n\n\n\n<p>KBE offers <a href=\"https:\/\/www.kbe-elektrotechnik.com\/en\/products\/solar-cables\/\">solar cables<\/a> in different lengths:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th class=\"has-text-align-center\" data-align=\"center\">KBE Solar DB+<\/th><th class=\"has-text-align-center\" data-align=\"center\">KBE Solar DB+ AR-TR<\/th><th class=\"has-text-align-center\" data-align=\"center\">KBE Solar Floating<\/th><th class=\"has-text-align-center\" data-align=\"center\">KBE Solar DB VDE<\/th><\/tr><\/thead><tbody><tr><td>100 m coil<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x274c;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x274c;<\/td><\/tr><tr><td>500 m Drum packaging<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><\/tr><tr><td>1000 m Drum packaging<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><td class=\"has-text-align-center\" data-align=\"center\">&#x2705;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Related standard: EN 62548<\/strong><br>\u201cCables must be installed in such a way that wind or snow do not cause permanent damage.\u201d<br>Reason: The swinging of a cable coil can lead to abrasion at the support point.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">General information about solar cables<\/h2>\n\n\n\n<p>Solar cables in PV systems must meet the requirements of <a href=\"https:\/\/www.vde-verlag.de\/normen\/0200017\/din-en-50618-vde-0283-618-2015-11.html\" target=\"_blank\" rel=\"noreferrer noopener\">EN 50618<\/a>.<\/p>\n\n\n\n<p>The materials used for these cables are selected to withstand <strong>ambient temperature<\/strong> fluctuations from <strong>-40&nbsp;\u00b0C to 90&nbsp;\u00b0C<\/strong> and to be <strong>resistant to UV radiation<\/strong>.<\/p>\n\n\n\n<p>The expected <strong>service life<\/strong> is <strong>25 years<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">General information on laying solar cables<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar cables must always be installed and laid with the utmost care to <strong>avoid mechanical damage.<\/strong><\/li>\n\n\n\n<li>Installation should only be carried out at <strong>temperatures above -20&nbsp;\u00b0C<\/strong>.<\/li>\n\n\n\n<li>Ensure that the cable and line routes are <strong>protected from unauthorized access<\/strong>.<\/li>\n\n\n\n<li><strong>No kinks or loops<\/strong> may form during installation.<\/li>\n\n\n\n<li>Cables must always be <strong>secured\/tied up<\/strong>.<\/li>\n\n\n\n<li>Cables must <strong>not be laid directly on the roof surface<\/strong> (DIN VDE 0100-712).<\/li>\n\n\n\n<li>Use <strong>conduits or cable routing systems<\/strong> if solar cables are to be laid in bundles.<\/li>\n\n\n\n<li>Cables must not be routed over <strong>sharp-edged areas<\/strong> when cable routing systems (ducts, conduits) are used.<\/li>\n\n\n\n<li>It must be ensured that water (e.g., <strong>condensate<\/strong>) can <strong>escape<\/strong> from the cable routing systems.<\/li>\n\n\n\n<li>To provide <strong>protection from the weather<\/strong> (water and UV radiation), install cables in rails \u2013 if possible.<\/li>\n\n\n\n<li>The <strong>rails<\/strong> should be <strong>perforated<\/strong> to allow rain or condensation to drain away.<\/li>\n\n\n\n<li>If the <strong>module transitions<\/strong> are located in a sunny area, the cables should be protected <strong>against UV radiation<\/strong>.<\/li>\n\n\n\n<li>If there is an increased <strong>risk of animal bites<\/strong>, the cables should be installed in pipes or cable ducts. Or use the <a href=\"https:\/\/www.kbe-elektrotechnik.com\/en\/products\/solar-cables\/kbe-solar-db-ar-tr\/\">KBE Solar DB+ TR-AR<\/a> solar cable.<\/li>\n\n\n\n<li><strong>Avoid contact with aggressive substances!<\/strong> This will preserve the mechanical and electrical properties and reduce corrosion damage.<\/li>\n\n\n\n<li>The <strong>maximum tensile force during installation<\/strong> is FP = \u03c3 A, where \u03c3 = 15 N\/mm\u00b2 and A is the nominal conductor cross-section.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-1024x681.jpg\" alt=\"W\u00e4hrend der Installation oder Wartung verbindet die Hand einer Person schwarze Kabel mit Anschl\u00fcssen unter einem Solarpanel-Steuerkasten.\" class=\"wp-image-12057\" style=\"aspect-ratio:16\/9;object-fit:cover\" srcset=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-1024x681.jpg 1024w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-350x233.jpg 350w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-768x511.jpg 768w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-1536x1022.jpg 1536w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-2048x1363.jpg 2048w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Stecker-scaled.jpg 2560w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Laying with other circuits<\/h2>\n\n\n\n<p>As a general rule, solar cables should always be laid <strong>separately from other circuits<\/strong>.<\/p>\n\n\n\n<p>If wires and cables from different circuits are to be laid together in conduits or cable ducts, you must observe <strong>EN 62548<\/strong> (Section 7) or <strong>DIN VDE 0100-520.<\/strong><\/p>\n\n\n\n<p><strong>DIN VDE 0100-520:<\/strong> \"Multiple circuits are permitted in one conduit or in one openable conduit if all conductors are insulated for the highest nominal voltage occurring and the conduits or openable conduits have sufficient cross-sections.\"<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The correct fastening of solar cables<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <strong>fastening clips or cable ties<\/strong> (wide and UV-resistant) to properly secure the cables.<\/li>\n\n\n\n<li>When using cable ties, please follow the <strong>manufacturer's instructions<\/strong> regarding tightening forces.<\/li>\n\n\n\n<li><strong>Avoid sharp edges<\/strong> when fastening.<\/li>\n\n\n\n<li><strong>Photovoltaic clips<\/strong> are suitable for attaching solar cables to metal rails.<\/li>\n\n\n\n<li><strong>Permissible bending radii<\/strong> and <strong>fastening distances<\/strong> according to <strong>EN 50565-1<\/strong> must be observed:<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">The smallest recommended bending radius:<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th class=\"has-text-align-center\" data-align=\"center\">4 mm\u00b2<\/th><th class=\"has-text-align-center\" data-align=\"center\">6 mm\u00b2<\/th><th class=\"has-text-align-center\" data-align=\"center\">10 mm\u00b2<\/th><\/tr><\/thead><tbody><tr><td>freely movable<\/td><td class=\"has-text-align-center\" data-align=\"center\">22 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">24 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">29 mm<\/td><\/tr><tr><td>permanently installed<\/td><td class=\"has-text-align-center\" data-align=\"center\">17 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">18 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">22 mm<\/td><\/tr><tr><td>mechanically stressed<\/td><td class=\"has-text-align-center\" data-align=\"center\">33 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">36 mm<\/td><td class=\"has-text-align-center\" data-align=\"center\">43 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Maximum mounting distances:<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th>4 mm\u00b2<\/th><th>6 mm\u00b2<\/th><th>10 mm\u00b2<\/th><\/tr><\/thead><tbody><tr><td>horizontal<\/td><td>250 mm<\/td><td>250 mm<\/td><td>250 mm<\/td><\/tr><tr><td>vertical<\/td><td>400 mm<\/td><td>400 mm<\/td><td>400 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-1024x683.jpg\" alt=\"Eine Person in Schutzausr\u00fcstung kniet auf einem Dach und verbindet w\u00e4hrend der Installation rote Solarleitungsdr\u00e4hte mit einem Solarpanel.\" class=\"wp-image-12076\" style=\"aspect-ratio:16\/9;object-fit:cover\" srcset=\"https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-1024x683.jpg 1024w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-350x233.jpg 350w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-768x512.jpg 768w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-1536x1024.jpg 1536w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-2048x1365.jpg 2048w, https:\/\/www.kbe-elektrotechnik.com\/wp-content\/uploads\/2025\/04\/KBE-Elektrotechnik-Solarleitungen-Installation-scaled.jpg 2560w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Pay attention to the correct installation method!<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Earth-fault and short-circuit-proof installation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Minimize<\/strong> the <strong>risk of ground faults<\/strong> and <strong>short circuits.<\/strong> Observe <strong>DIN VDE 0100-712<\/strong>.<\/li>\n\n\n\n<li>Attach solar cables <strong>properly to the solar module<\/strong>:\n<ul class=\"wp-block-list\">\n<li>e.g., the connector should not rest on the roof surface.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Lay solar cables in a way that <strong>protect<\/strong>s them <strong>from water<\/strong>.<\/li>\n\n\n\n<li><strong>Do not<\/strong> lay solar cables in places where <strong>rainwater<\/strong> collects.<\/li>\n<\/ul>\n\n\n\n<p><strong>Related standard: DIN VDE 0100-712, section 712.521.101<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Parallel laying<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar cables should be laid <strong>parallel<\/strong> to each other if possible.<\/li>\n\n\n\n<li>To avoid interactions, the <strong>positive and negative cables<\/strong> should be laid <strong>separately<\/strong> in ducts.<\/li>\n\n\n\n<li>In accordance with <strong>DIN EN 62548<\/strong>, the following should be observed for solar cables with a <strong>length of &gt; 50 m:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Install in grounded metal conduits or ducts, or<\/li>\n\n\n\n<li>bury (follow guidelines), or<\/li>\n\n\n\n<li>provide a grounded shield, or<\/li>\n\n\n\n<li>protect with a surge protective device (SPD).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>Related standards:<\/strong><\/p>\n\n\n\n<p><strong>DIN VDE 0100-712, Section 712.521.102:<\/strong><br>\"To minimize voltages induced by lightning, the area of \u200b\u200ball cable and conductor loops should be kept as small as possible, especially in the cabling of PV strings.\"<\/p>\n\n\n\n<p><strong>EN 62548, Paragraph 6.6.2:<\/strong><br>\"Solar cables and the equipotential bonding conductors must be laid as parallel as possible.\"<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Underground laying<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mechanical stress on the buried cable must be eliminated.<\/li>\n\n\n\n<li>To protect against rodents and insects, the cables should be installed in pipes or cable ducts. Alternatively, use the <a href=\"https:\/\/www.kbe-elektrotechnik.com\/en\/products\/solar-cables\/kbe-solar-db-ar-tr\/\">KBE Solar DB+ TR-AR<\/a> solar cable.<\/li>\n\n\n\n<li>Contact with <strong>aggressive media<\/strong>, which reduces the mechanical and electrical properties, must be <strong>eliminated<\/strong>.<\/li>\n\n\n\n<li>When installing different cable types, the <strong>compatibility<\/strong> of the materials used must be ensured.<\/li>\n\n\n\n<li>When selecting cable and line routes, <strong>heat sources<\/strong> and <strong>vibrations<\/strong> that increase the risk of damage must be <strong>eliminated<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p><strong>Related standards:<\/strong><\/p>\n\n\n\n<p><strong>DIN VDE 50174-1 Section 5.2.4 and DIN VDE 0891 Part 6 Section 4.2:<\/strong><br>\"Installation on a solid, smooth, and stone-free trench bottom and bedding in sand or stone-free soil.\"<\/p>\n","protected":false},"featured_media":12095,"template":"","meta":{"_acf_changed":true,"_seopress_robots_primary_cat":"","_seopress_titles_title":"Laying solar cables correctly \u25baNotes for installers","_seopress_titles_desc":"Non-binding information for the correct installation of solar cables and solar lines including standards \u25baFor installers and technicians","_seopress_robots_index":""},"class_list":["post-12130","ratgeber","type-ratgeber","status-publish","has-post-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kbe-elektrotechnik.com\/en\/wp-json\/wp\/v2\/ratgeber\/12130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kbe-elektrotechnik.com\/en\/wp-json\/wp\/v2\/ratgeber"}],"about":[{"href":"https:\/\/www.kbe-elektrotechnik.com\/en\/wp-json\/wp\/v2\/types\/ratgeber"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kbe-elektrotechnik.com\/en\/wp-json\/wp\/v2\/media\/12095"}],"wp:attachment":[{"href":"https:\/\/www.kbe-elektrotechnik.com\/en\/wp-json\/wp\/v2\/media?parent=12130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}