{"id":21125,"date":"2026-02-25T08:00:07","date_gmt":"2026-02-25T07:00:07","guid":{"rendered":"https:\/\/hycleaner.de\/?p=21125"},"modified":"2026-05-21T14:08:07","modified_gmt":"2026-05-21T12:08:07","slug":"water-pressure-and-water-volume-for-cleaning-large-pv-systems","status":"publish","type":"post","link":"https:\/\/hycleaner.de\/en\/expert-knowledge\/water-pressure-and-water-volume-for-cleaning-large-pv-systems\/","title":{"rendered":"Water pressure and water volume for cleaning large PV systems"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"21125\" class=\"elementor elementor-21125 elementor-21124\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a12949c e-con-full e-flex e-con e-parent\" data-id=\"a12949c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-60757c51 elementor-widget__width-initial elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"60757c51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Water pressure and water volume for cleaning large PV systems<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4224e54c elementor-widget elementor-widget-post-info\" data-id=\"4224e54c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-d4e9e0c elementor-inline-item\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<span class=\"elementor-post-info__terms-list-item\">Expert Knowledge<\/span>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-ac88f4a elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>February 25, 2026<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-35d9680 e-con-full e-flex e-con e-parent\" data-id=\"35d9680\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26293e7 elementor-widget elementor-widget-image\" data-id=\"26293e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"2560\" height=\"867\" src=\"https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-scaled.webp\" class=\"attachment-full size-full wp-image-21891\" alt=\"\" srcset=\"https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-scaled.webp 2560w, https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-300x102.webp 300w, https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-1024x347.webp 1024w, https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-768x260.webp 768w, https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-1536x520.webp 1536w, https:\/\/hycleaner.de\/wp-content\/uploads\/2026\/02\/header-naesse-3840x1300-01-2048x693.webp 2048w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0a8ffb1 e-flex e-con-boxed e-con e-parent\" data-id=\"0a8ffb1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-031f898 elementor-widget elementor-widget-heading\" data-id=\"031f898\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Problem: Poor cleaning due to incorrect water usage<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-910a012 elementor-widget elementor-widget-text-editor\" data-id=\"910a012\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Operators of large photovoltaic systems face a recurring technical problem:<\/p><ul><li>Many cleaning methods use too little water or utilize high-pressure cleaners \u2013 which may seem powerful for solar modules, but can damage the sensitive glass surface.<\/li><li>Pure low pressure on smooth PV surfaces can cause abrasion from dirt particles without a sufficient water volume, instead of dissolving them.<\/li><li>Furthermore, height differences and long hose distances lead to water pressure losses that reduce the cleaning effect.<\/li><li>Incorrectly sized hoses further reduce water throughput and thus the cleaning performance.<\/li><\/ul><p>\u2192 Studies on PV cleaning techniques recommend adjusted water volumes and suitable pressure to optimize cleaning efficiency and module protection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-401bd84 elementor-widget elementor-widget-heading\" data-id=\"401bd84\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Solution: Low pressure + sufficient water volume + correct hose technology<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f8107d2 elementor-widget elementor-widget-text-editor\" data-id=\"f8107d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>lore<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a2cbaa elementor-widget elementor-widget-heading\" data-id=\"2a2cbaa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Pre-cleaning and main cleaning with water<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e1ea091 elementor-widget elementor-widget-text-editor\" data-id=\"e1ea091\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For optimal results, pre-cleaning and main cleaning with water is recommended, ideally with osmosis water:<\/p><p>Osmosis water is free of salts, minerals, and residues, offering a gentle yet effective cleaning without additives.<\/p><p>The filtered water creates a flushing effect that gently dissolves dirt without rubbing.<\/p><p>Benefit: Gentle removal of dirt, lower risk of scratching, and less post-cleaning required.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0546511 elementor-widget elementor-widget-heading\" data-id=\"0546511\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Low-pressure range instead of high pressure<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d75cec elementor-widget elementor-widget-text-editor\" data-id=\"3d75cec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tSolar cleaning robots work effectively in the low-pressure range (approx. 2\u20134 bar) \u2013 this is roughly the same as a standard tap connection. Low-pressure cleaning ensures the surface of the modules is not damaged. \n\nBenefit: Gentle cleaning without risk to module glass or seals.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b7a7b9 elementor-widget elementor-widget-heading\" data-id=\"7b7a7b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Consider water pressure losses and hose diameter<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-886e2cc elementor-widget elementor-widget-text-editor\" data-id=\"886e2cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tPressure losses are caused by:\n\nHeight differences: Rule of thumb: ~1 bar pressure loss per 10 m height\n\nLong hose lengths and small internal diameters: reduce water throughput\n\nhyCLEANER recommends supply hoses with an internal diameter of at least 10 mm for the solarROBOT series to ensure sufficient water flow.\n\nBenefit: Constant water pressure and higher cleaning effect across the entire system.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3fef765 faq elementor-widget elementor-widget-heading\" data-id=\"3fef765\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advantages of the correct water strategy<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-648f688 elementor-widget elementor-widget-html\" data-id=\"648f688\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<!-- Elementor: in ein HTML-Widget einf\u00fcgen -->\n<div class=\"hv-tablewrap\">\n\n  <!-- Desktop\/Tablet: Tabelle -->\n  <table class=\"hv-table\">\n    <thead>\n      <tr>\n        <th>Challenge<\/th>\n        <th>Solution<\/th>\n        <th>Result<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>Dirt rubs instead of dissolving<\/td>\n        <td>Osmosis water + sufficient water volume<\/td>\n        <td>Less abrasion &amp; cleanliness<\/td>\n      <\/tr>\n      <tr>\n        <td>Pressure losses<\/td>\n        <td>Correct hose + pressure planning<\/td>\n        <td>Uniform cleaning<\/td>\n      <\/tr>\n      <tr>\n        <td>Module risks<\/td>\n        <td>Low pressure instead of high pressure<\/td>\n        <td>No surface damage<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <!-- Mobile: Accordion (ohne JS) -->\n  <div class=\"hv-accordion\" aria-label=\"Herausforderung \/ L\u00f6sung \/ Ergebnis\">\n    <details class=\"hv-item\">\n      <summary class=\"hv-summary\">Dirt rubs instead of dissolving<\/summary>\n      <div class=\"hv-content\">\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Solution<\/div>\n          <div class=\"hv-value\">Osmosis water + sufficient water volume<\/div>\n        <\/div>\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Result<\/div>\n          <div class=\"hv-value\">Less abrasion &amp; cleanliness<\/div>\n        <\/div>\n      <\/div>\n    <\/details>\n\n    <details class=\"hv-item\">\n      <summary class=\"hv-summary\">Pressure losses<\/summary>\n      <div class=\"hv-content\">\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Solution<\/div>\n          <div class=\"hv-value\">Correct hose + pressure planning<\/div>\n        <\/div>\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Result<\/div>\n          <div class=\"hv-value\">Uniform cleaning<\/div>\n        <\/div>\n      <\/div>\n    <\/details>\n\n    <details class=\"hv-item\">\n      <summary class=\"hv-summary\">Module risks<\/summary>\n      <div class=\"hv-content\">\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Solution<\/div>\n          <div class=\"hv-value\">Low pressure instead of high pressure<\/div>\n        <\/div>\n        <div class=\"hv-row\">\n          <div class=\"hv-label\">Result<\/div>\n          <div class=\"hv-value\">No surface damage<\/div>\n        <\/div>\n      <\/div>\n    <\/details>\n  <\/div>\n\n<\/div>\n\n<style>\n\/* Wrapper *\/\n.hv-tablewrap { width: 100%; }\n\n\/* Tabelle (Desktop\/Tablet) *\/\n.hv-table{\n  width: 100%;\n  border-collapse: collapse;\n  table-layout: fixed;\n  border: 1px solid #e8e8e8;\n  border-radius: 12px;\n  overflow: hidden; \/* wirkt je nach Browser nur mit wrapper; ist ok *\/\n}\n.hv-table th, .hv-table td{\n  padding: 18px 16px;\n  border-bottom: 1px solid #efefef;\n  vertical-align: top;\n  word-wrap: break-word;\n}\n.hv-table thead th{\n  font-weight: 700;\n  text-align: left;\n  background: #fafafa;\n}\n.hv-table tbody tr:last-child td{ border-bottom: 0; }\n\n\/* Accordion (Mobile) *\/\n.hv-accordion{ display: none; }\n.hv-item{\n  border: 1px solid #e8e8e8;\n  border-radius: 12px;\n  overflow: hidden;\n  background: #fff;\n  margin: 0 0 12px 0;\n}\n.hv-summary{\n  list-style: none;\n  cursor: pointer;\n  padding: 16px;\n  font-weight: 700;\n  background: #fafafa;\n  position: relative;\n}\n.hv-summary::-webkit-details-marker{ display: none; }\n.hv-summary:after{\n  content: \"\u25be\";\n  position: absolute;\n  right: 16px;\n  top: 50%;\n  transform: translateY(-50%);\n  font-size: 14px;\n}\ndetails[open] .hv-summary:after{ content: \"\u25b4\"; }\n\n.hv-content{ padding: 12px 16px 16px; }\n.hv-row{ margin-top: 10px; }\n.hv-label{ font-size: 12px; text-transform: uppercase; letter-spacing: .04em; opacity: .7; }\n.hv-value{ margin-top: 4px; font-size: 14px; line-height: 1.45; }\n\n\/* Breakpoint: Mobile -&gt; Accordion, Tablet\/Desktop -&gt; Tabelle *\/\n@media (max-width: 767px){\n  .hv-table{ display: none; }\n  .hv-accordion{ display: block; }\n}\n\n\/* Optional: Wenn du Accordion auch auf Tablet willst, nimm stattdessen:\n@media (max-width: 1024px){ ... }\n*\/\n<\/style>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cd5072 elementor-align-left elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"0cd5072\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/hycleaner.de\/en\/expert-knowledge\/cleaning-solar-panels-5-practical-tips\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Back to article<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Efficient, safe, and sustainable \u2013 but how do professionals really clean their PV systems correctly? Find out which methods deliver optimal results and what matters. <\/p>\n","protected":false},"author":1,"featured_media":10830,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[116],"tags":[117],"class_list":["post-21125","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-expert-knowledge","tag-solar"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Water pressure &amp; water volume for solar cleaning<\/title>\n<meta name=\"description\" content=\"Learn how the correct water volume, low pressure &amp; suitable hose technology make solar cleaning efficient &amp; gentle.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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