{"id":3995,"date":"2023-04-11T10:10:06","date_gmt":"2023-04-11T10:10:06","guid":{"rendered":"https:\/\/csiag.eu\/?p=3995"},"modified":"2023-04-11T12:04:51","modified_gmt":"2023-04-11T12:04:51","slug":"lux-and-pv-yield","status":"publish","type":"post","link":"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/","title":{"rendered":"Lux and PV yield"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/#Lux-Messung\" >Lux measurement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/#Variablen\" >Variables<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/#Programm\" >Program<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/#Skript\" >script<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/#Visualisierung\" >Visualization<\/a><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">1 lux represents 1 lumen per m<sup>2<\/sup>. In connection with the performance calculation of planned PV systems, values of solar energy measuring devices are in watts per m<sup>2<\/sup> reproduced. This value, multiplied by the planned square meters, gives the expected energy yield.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The so-called <em>Solar constant<\/em>  describes the radiation output of the sun as 1,361 W\/m<sup>2<\/sup> in space. For calculating the effective watts per m<sup>2<\/sup>that actually hit the PV modules, various damping factors (atmosphere, haze, dust pollution, etc.) must be taken into account, which also change constantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The steeper the incidence of light and the closer to the equator, the higher the yield. The relatively small difference in latitude between Germany and Austria alone results in a yield that is around 12 % higher.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you want to derive a rough estimate of effectively usable radiation power from measured lux values, you can assume around lux \/ 900.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lux-Messung\"><\/span>Lux measurement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There is one for Homematic and RaspberryMatic <a href=\"https:\/\/de.elv.com\/elv-homematic-ip-komplettbausatz-lichtsensor-aussen-hmip-slo-fuer-smart-home-hausautomation-151598?utm_source=affiliate&amp;utm_medium=feed&amp;utm_campaign=affiliate_idealo&amp;awc=11447_1681206327_0134b83283bc30fc0cf5858471824d9d\" target=\"_blank\" rel=\"noreferrer noopener\">Light sensor<\/a>, which records a measuring range from 0.01 lx to 83680 lx.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Variablen\"><\/span>Variables<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The following variables are of type <code>Number<\/code> must be created:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>LS_<\/code>avg<\/li>\n\n\n\n<li><code>Wm_2<\/code><\/li>\n\n\n\n<li><code>Wm_2_g<\/code><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Programm\"><\/span>Program<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The program will be on <code>Update<\/code> of the sent measured value is triggered and the included script is executed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"287\" src=\"https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-1024x287.png\" alt=\"\" class=\"wp-image-4017\" srcset=\"https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-1024x287.png 1024w, https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-1536x430.png 1536w, https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-2048x574.png 2048w, https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-300x84.png 300w, https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-4-768x215.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Skript\"><\/span>script<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The lux value is determined by the channel <code>1:AVARAGE_ILLUMINATION<\/code> of the light sensor queried and in the variable <code>LS_<\/code>avg saved.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The conversion into any W\/m<sup>2<\/sup> is done by dividing from<code> LS_<\/code>avg through <code>1300<\/code> and will be in the variable <code>Wm_2<\/code> saved.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The approximate total yield, corresponding to the installed module area, results from multiplying the square meter output by the sum of the module areas (here <code>7,68<\/code> m<sup>2<\/sup>), stored in the variable <code>Wm_2_g<\/code>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>var avgLS = dom.GetObject(&quot;HmIP-RF.000D5F29ADD1DB:1.AVERAGE_ILLUMINATION&quot;).Value();<br>dom.GetObject(&#039;LS_avg&#039;).State(avgLS);<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>var Wm_2 = avgLS \/ 1300;<br>dom.GetObject(&#039;Wm2&#039;).State(Wm_2);<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>! 7.68 sqm total module area<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>var Wm_2_g = Wm_2 * 7.68;<br>dom.GetObject(&#039;Wm2_g&#039;).State(Wm_2_g);<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Visualisierung\"><\/span>Visualization<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The visualization via AIO Creator then looks like this:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-5.png\" alt=\"\" class=\"wp-image-4022\" width=\"214\" height=\"183\" srcset=\"https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-5.png 392w, https:\/\/csiag.eu\/wp-content\/uploads\/2023\/04\/image-5-300x257.png 300w\" sizes=\"(max-width: 214px) 100vw, 214px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Be used as a value range for the display <code>0<\/code> and <code>83680<\/code>, the maximum possible measured value of the light sensor, is entered.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The currently measured lux value, the average power per square meter, and the approximate power sum resulting from the total installed area are displayed.<\/p>","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>1 lux represents 1 lumen per m2. In connection with the power calculation of planned PV systems, values from solar energy meters are given in watts per m2 . This value, multiplied by the planned square meters, gives the expected energy yield. The so-called solar constant describes the radiation output of the sun as 1,361 W\/m2 in space. For the calculation of the effective watt...&nbsp;<a href=\"https:\/\/csiag.eu\/en\/blog\/2023\/04\/11\/lux-und-pv-ertrag\/\" rel=\"bookmark\">Read More \"<span class=\"screen-reader-text\">Lux and PV yield<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1353,347,1260],"tags":[1385,1357,377,1386,1377,1382,1374,1379,1384,1380,372,638,1375,902,371,1383,1381,891,683,894,1378],"class_list":["post-3995","post","type-post","status-publish","format-standard","hentry","category-pv-anlage","category-smarthome-im-wohnmobil","category-stromerzeugung","tag-energie-ertrag","tag-ertrag","tag-homematic","tag-leistungsberechnung","tag-lichtsensor","tag-lumen","tag-lux","tag-lux-messung","tag-messgeraet","tag-modulflaeche","tag-programm","tag-pv-anlage","tag-pv-ertrag","tag-raspberrymatic","tag-skript","tag-solarenergie","tag-solarkonstante","tag-sonne","tag-strahlungsleistung","tag-umrechnung","tag-watt"],"modified_by":"Achim Goerner","_links":{"self":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts\/3995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/comments?post=3995"}],"version-history":[{"count":0,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts\/3995\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/media?parent=3995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/categories?post=3995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/tags?post=3995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}