{"id":7787,"date":"2021-10-18T12:20:27","date_gmt":"2021-10-18T10:20:27","guid":{"rendered":"https:\/\/www.neo-messtechnik.com\/?page_id=7787"},"modified":"2026-04-03T10:18:05","modified_gmt":"2026-04-03T08:18:05","slug":"pv-inspection-methods","status":"publish","type":"page","link":"https:\/\/www.neo-messtechnik.com\/en\/pv-inspection-methods","title":{"rendered":"PV Inspection"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div id=\"fws_6a0c6933edec1\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h1 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >Solar plant \/ Photovoltaic Inspection<\/h1><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">The number of solar power plants has been steadily increasing over the past years. Photovoltaic systems are known for:<\/span><\/p>\n<ul>\n<li>Long Lifetime<\/li>\n<li>Low aging effects<\/li>\n<li>Low maintenance<\/li>\n<li>Low operation costs<\/li>\n<li>Easy installation<\/li>\n<li>Robust<\/li>\n<\/ul>\n<p><span class=\"fontstyle0\">Nevertheless different kind of faults in PV systems can occour:<\/span><\/p>\n<ul>\n<li>Performance losses <span style=\"color: #ff0000;\"><strong>&gt;10%<\/strong> <\/span>within <strong>3 years<\/strong> at most installations<\/li>\n<li>Most faults are not detectable by visual inspection<\/li>\n<li>Mismatch losses of PV strings are <span style=\"color: #ff0000;\"><strong>10x<\/strong><\/span> to <span style=\"color: #ff0000;\"><strong>100x<\/strong><\/span> times higher than defect panels<\/li>\n<\/ul>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/pv-park-scaled.jpeg\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c6933f0d33\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeInUp fadeInUp \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_row wpb_row vc_inner vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p>FAULT DETECTION<\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element list\" style=\"\"><ul data-icon=\"steadysets-icon-checkmark\">\n\t\t\t\t<li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Mismatch Losses<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Hotspots<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>PID (Potential induced degradation)<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Bypass diode defect<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Cell Crack<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Soiling &amp; Glass breakage<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>Delamination &amp; Discoloration<\/h6><p><\/p><\/dd><\/dl><\/li><li class=\"titledesc\"><dl class=\"dl-horizontal\"><dt><span class=\"circle\"><i class=\"\"><\/i><\/span><\/dt><dd><h6>and a lot more<\/h6><p><\/p><\/dd><\/dl><\/li><\/ul><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">Even if manufacturer of panels promote their products as: Non-PID, No Cell crack, no hotspot possible, of course the above mentioned problems occour at any type of PV panel.<br \/>\n<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/pv-iv-curve-tracer.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c6933f3d45\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >Mismatch losses<\/h2><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">Mismatch losses occur at serial or parallel connection of PV<br \/>\npanels due to differing electrical characteristics. The reasons for<br \/>\nmismatch can be: different panels, different elevation, shading,<br \/>\nhotspots, PID, any other faults. The following picture gives an<br \/>\nexplanation of the losses due to serial (left) and parallel (right)<br \/>\nconnection:<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/parallel-pv-mismatch-losses.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"HWIDPQA\" class=\"vc_row wpb_row vc_row-fluid   row-dynamic-el section-style parallax_section mobile_parallax_section    \" style=\"background-repeat: no-repeat; background-color: #f6f6f6;  background-image: url(); background-position: 50% 0px; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"bg-overlay\" style=\"background:rgba(246,246,246,0.9);\"><\/div><div class=\"container animate_onoffset dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-12 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 16px;color: #1c1c1c;line-height: 24px;text-align: center;letter-spacing:6px\" >Example: Mismatch losses PV park<\/h2><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">\u00a0In solar farms usually a combination of series and parallel connection of PV panels is used in order to use the full MPP input range of inverters. Via series connection panels will be connected to a PV-String. Connecting this PV strings together via parallel connection will represent a PV-Array. If now one string of the PV-array will reduce it&#8217;s output power due to any defective module or tempory shading, not only the power of this string will be reduced. The whole system voltage (parallel connection of voltage sources) will decrease and the power of the whole array decreases. In the example below the output power of the array will be reduced by 8 kW (30%) instead of 3kW (10% reduction at string) due to this Mismatch losses.<br \/>\n<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/mismatch-losses-pv-park-solar.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c693403a1d\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-12 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >Inspection methods<\/h2><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p>Inspection of solar PV parks are divided in several disciplines. First of all the system needs to be checked for any safety issues. Leakage currents and isolations faults can be dangerous people and can also affect other equipment like pipelines. Further performance limiting faults like PID, Hotspots, broken, bypass diodes etc. should be detected and the performance of the whole system according to IEC62446-2 analysed.<\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/pv-inspection-2.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c6934056b4\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >Inspection methods<\/h2><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><em><strong>Visual inspection<br \/>\n<\/strong><\/em><\/p>\n<p><span class=\"fontstyle0\">Visual inspections are important to detect major problems, like broken fuses, obvious panel issues, etc. Nevertheless this method only allows detecting few issues. As an example after a hailstorm only a few modules were exhanged at a solar power plant. Detailed investigations showed that a lot more modules were affected by the hailstorm.<br \/>\n<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><em><strong>Thermal Imaging<\/strong><\/em><\/p>\n<p><span class=\"fontstyle0\">This technique is most used for inspection of PV plants. It requires Know-How for executionand analysis of the measurements. Often drones or airplanes are used and the power plant needs to be in full operation (heat). It allows detection of different kind of faults and to find broken components. <\/span><\/p>\n<p><span class=\"fontstyle0\">Drawbacks:<\/span><\/p>\n<ul>\n<li><span class=\"fontstyle0\">Mismatch losses are not detected<\/span><\/li>\n<li><span class=\"fontstyle0\">PID can not be detected<br \/>\n<\/span><\/li>\n<li>Cell cracks can not be detected<\/li>\n<\/ul>\n<p><em><strong>Electroluminescene<\/strong><\/em><\/p>\n<p><span class=\"fontstyle0\">\u00a0This technique is mainly done in laboratories. Modules will get activated by current injection. Measurements are done without solar radiation (by night). It allows detailed analysisof PV panels. Nevertheless mobile measurement systems to analyse whole PV strings are not available yet. The systems require high power for signal injection. <\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/dirty-pv-panel.jpg\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div><div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"\" alt=\"\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div><div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"\" alt=\"\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c693407ae5\" class=\"vc_row wpb_row vc_row-fluid   row-dynamic-el section-style parallax_section mobile_parallax_section    \" style=\"background-repeat: no-repeat; background-color: #f6f6f6;  background-image: url(); background-position: 50% 0px; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"bg-overlay\" style=\"background:rgba(246,246,246,0.9);\"><\/div><div class=\"container animate_onoffset dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-12 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 36px;color: #1c1c1c;text-align: center\" >IV CURVE TRACING<\/h2><\/div><div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 16px;color: #1c1c1c;line-height: 24px;text-align: center;letter-spacing:6px\" >with automatic system diagnostics<\/h2><\/div><div class=\"codeless_separator\" style=\" height:1px;  margin-top:0px;  margin-bottom:35px; \"><span class=\"separator\" style=\" width:60px;  background:#ffdd00;  left:50%;height:100%; margin-left: -30px;position: absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">This technique will record the voltage and current profile (IV curve) of PV panels starting at the open-circuit voltage (Voc) to the short-circuit current (Isc) by applying a load. Depending of the shape of the curve, the different possible faults can be detected and differentiated. Further it&#8217;s the only method to detect mismatch losses.<br \/>\n<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"vc_row wpb_row vc_inner vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-3\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\" services_small wpb_content_element align_right\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"steadysets-icon-book2\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">Mismatch losses<\/a><\/h4>    <div class=\"content\">         <div>only method to detect Mismatch losses<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_right\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"steadysets-icon-phone-portrait\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">Shading<\/a><\/h4>    <div class=\"content\">         <div>detection of shading and estimation of lost yearly revenue<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_right\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"linecon-icon-video\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">Soiling, contamination<\/a><\/h4>    <div class=\"content\">         <div>using intelligent algorithmn<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_right\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"linecon-icon-video\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">By-pass diode failure<\/a><\/h4>    <div class=\"content\">         <div>Detection of broken bipass diodes (open- or shortcircuit)<\/div>    <\/div>    <\/dd><\/dl><\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/iv_curve.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">The following picture shows an example of a simultaneous measurement of a PV array with 17 strings.<br \/>\n<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/IV-curve-photovoltaic.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-3\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\" services_small wpb_content_element align_left\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"moon-shuffle\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">Hotspot<\/a><\/h4>    <div class=\"content\">         <div>detection of Hot-spots even at low irradiance<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_left\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"steadysets-icon-diamond\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">PID<\/a><\/h4>    <div class=\"content\">         <div>Detection of PID (Potential Induced Degradation)<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_left\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"steadysets-icon-diamond\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">Cell Crack, Broken Glass, ...<\/a><\/h4>    <div class=\"content\">         <div>Detection of further faults<\/div>    <\/div>    <\/dd><\/dl><\/div><div class=\" services_small wpb_content_element align_left\"><dl class=\"dl-horizontal with_icon\">    <dt><div class=\"wrapper\" style=\"background:#ffdd00;\">        <i class=\"steadysets-icon-newspaper\" style=\"color:#ffffff;\"><\/i><\/div>    <\/dt>    <dd>        <h4><a href=\"#\">IEC 62446<\/a><\/h4>    <div class=\"content\">         <div>fully compliant to IEC 62446-2<\/div>    <\/div>    <\/dd><\/dl><\/div><\/div><\/div><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p><span class=\"fontstyle0\">While using single-channel IV tracing systems will take a lot of time (days) for inspection of solar farms (e.g. 400 strings for 3 MW) the muti-channel IV-curve tracing system will allow inspection of solar power plants within very short time (~4 hours per MW)\u00a0 and will give valueable information about the <strong>mismatch<\/strong> <strong>losses<\/strong>.<br \/>\n<\/span><\/p>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c69340ca39\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 vc_col-xs-4\/5 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/solar-photovoltaic-diagnostic-system.png\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >AUTOMATIC DIAGNOSTIC<\/h2><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p>The patented diagnostic system automatically shows the condition of each string. Different colours outlines the string performance and shows different PV module faults.<\/p>\n<p>Fault detection: Mismatch, PID, Hotspot, Bypass diode breakage,\u00a0 Shading, Soiling, Glass breakage, Delamination, Cell Crack etc.<\/p>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c69340eabe\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el section-style     wpb_animate_when_almost_visible wpb_fadeIn fadeIn \" style=\"background-color: #ffffff; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 38px;color: #222222;line-height: 44px;text-align: left\" >Comparision of different inspection methods<\/h2><\/div><div class=\"codeless_separator\" style=\" height:2px;  margin-top:-15px;  margin-bottom:20px; \"><span class=\"separator\" style=\" width:70px;  background:#ffdd00;  left:0; height:100%; position:absolute;\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<p>The following table gives an comparison of different PV \/ solar inspection methods:<\/p>\n<ul>\n<li>Visual inspection<\/li>\n<li>Thermal imaging<\/li>\n<li>Electroluminescence<\/li>\n<li>IV-curve Tracing<\/li>\n<li>Multi-Channel IV-Curve Tracing incl. smart diagnostic system<\/li>\n<\/ul>\n\n\t\t<\/div> \n\t<\/div> \n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 vc_col-xs-4\/5 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> \n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/10\/neo-comparison-between-PV-inspection-methods.jpg\" alt=\"Alt Text\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c693410cb9\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el standard_section     \" style=\"background-color: #c6c6c6; padding-top: 20px ; padding-bottom: 20px ; \" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-6 wpb_column column_container vc_custom_1587805963444  vc_custom_1587805963444\" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"text-align: left\" >PV IV-Curve Tracing Systems<\/h2><\/div><div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><a href=\"https:\/\/www.neo-messtechnik.com\/pv-master-10\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2025\/02\/PV-Master-IV-curve-tracer-4.png\" alt=\"Media\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/a><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n\n\t<div class=\"vc_col-sm-6 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> \n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> \n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t\n\t\t<\/div> \n\t<\/div> <div class=\"wpb_content_element button \"><a  class=\"btn-bt align-center default\" href=\"https:\/\/www.neo-messtechnik.com\/pv-master-10\"><span>NEO PV Master<\/span><i class=\"moon-file-pdf\"><\/i><\/a><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div><div id=\"fws_6a0c693412e43\" class=\"vc_row wpb_row vc_row-fluid  animate_onoffset row-dynamic-el standard_section     \" style=\"\" ><div  style=\"position: absolute;top: 0;\"><\/div><div class=\"container  dark\"><div class=\"section_clear\">\n\t<div class=\"vc_col-sm-12 wpb_column column_container \" style=\"\" data-animation=\"none\" data-delay=\"\">\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"vc_custom_heading wpb_content_element\" ><h2 style=\"font-size: 36px;color: #1c1c1c;text-align: center\" >Learn more about ..<\/h2><\/div><div class=\"codeless_separator\" style=\" height:1px;  margin-top:0px;  margin-bottom:35px; \"><span class=\"separator\" style=\" width:60px;  background:#ffdd00;  left:50%;height:100%; margin-left: -30px;position: absolute;\"><\/span><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-o-equal-height vc_row-o-content-top vc_row-flex\"><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_content_element media_align_left media media_el animate_onoffset \"><div class=\"media_wrapper\" ><a href=\"https:\/\/www.neo-messtechnik.com\/appnote_supraharmonics_plc_en\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.neo-messtechnik.com\/wp-content\/uploads\/2021\/01\/Cover-Image.jpg\" alt=\"Media\" class=\"type_image animated fadeInLeft alignment_left\" \/><\/a><\/div><\/div><div class=\"wpb_content_element button buttons_two al_left\"><a  class=\"btn-bt align- default\" href=\"https:\/\/www.neo-messtechnik.com\/appnote_supraharmonics_plc_en\"><span>Englisch<\/span><i class=\"moon-file-pdf\"><\/i><\/a><a class=\"btn-bt default\" href=\"https:\/\/www.neo-messtechnik.com\/appnote_supraharmonics_plc_de\"><span>German<\/span><i class=\"moon-file-pdf\"><\/i><\/a><\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<h3 style=\"text-align: center;\">How Not To &#8211; Out-dated Measurement Approach<\/h3>\n<p>Analysing the effects of Supraharmonics asks for Power Quality Analyzer that cover a frequency range up to 500 kHz. Classical PQ Analyzers present problems because of their limited bandwidth. Typically they can measure up to the 50th Harmonics (2.5kHz), but cannot detect higher emissions of voltage and currents. By design, they are <strong>not able <\/strong>to be used in the troubleshooting process at all.<\/p>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element \">\n\t\t<div class=\"wpb_wrapper\" >\n\t\t\t<h3 style=\"text-align: center;\">How To &#8211; Troubleshooting with the PQA 8000<\/h3>\n<p>In this Application Note, we outline the complexity and shortcomings of traditional measurement approaches we often see out in the field. Fortunately, all these problems do not concern engineers with the appropriate measurement equipment. Our customers appreciate the <a href=\"https:\/\/www.neo-messtechnik.com\/pqa8000\" target=\"_blank\" rel=\"noopener nofollow noreferrer\">PQA8000H <\/a>in troubleshooting Supraharmonic emissions, where its strengths really come into play ..<\/p>\n\n\t\t<\/div> \n\t<\/div> <div class=\"vc_btn3-container vc_btn3-center vc_do_btn\" ><a class=\"vc_general vc_btn3 vc_btn3-size-md vc_btn3-shape-rounded vc_btn3-style-modern vc_btn3-color-grey\" href=\"https:\/\/www.neo-messtechnik.com\/en\/applications#SH\" title=\"Applications\">Applications<\/a><\/div><\/div><\/div><\/div><\/div>\n\t\t\t<\/div> \n\t<\/div> \n<\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Solar plant \/ Photovoltaic Inspection The number of solar power plants has been steadily increasing over the past years. Photovoltaic systems are known for: Long Lifetime Low aging effects Low maintenance Low operation costs Easy installation Robust Nevertheless different kind of faults in PV systems can occour: Performance losses &gt;10% within 3 years at most [...]","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7787","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PV Inspection - NEO Messtechnik<\/title>\n<meta name=\"description\" content=\"24bit, 1MS\/s, multi-touch display and 4 hours of mobile operation. 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