{"id":15964,"date":"2026-06-24T20:08:00","date_gmt":"2026-06-24T12:08:00","guid":{"rendered":"https:\/\/eauav.com\/?p=15964"},"modified":"2026-06-24T20:08:03","modified_gmt":"2026-06-24T12:08:03","slug":"how-to-test-solar-panel-cleaning-effect-ab-kwh-kwp-method","status":"publish","type":"post","link":"https:\/\/eauav.com\/pt-br\/how-to-test-solar-panel-cleaning-effect-ab-kwh-kwp-method\/","title":{"rendered":"How to Test Solar Panel Cleaning Effect: A\/B kWh\/kWp Method for PV O&amp;M Teams"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Solar cleaning buyers often ask one question: &#8220;How much more power will we get after cleaning?&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The honest answer is: measure it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A drone cleaning demo can look impressive on video, but photos do not prove energy gain. PV O&amp;M teams should compare cleaned and uncleaned sections using production data, site conditions and a simple A\/B test.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quick answer: select comparable PV blocks, clean one block, leave the other as a control, record kWh\/kWp before and after cleaning, and compare results under similar irradiance and temperature conditions. For stronger analysis, use irradiance sensors, performance ratio or soiling measurements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Who This Guide Is For<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This guide is for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PV O&amp;M companies<\/li>\n\n\n\n<li>Solar asset owners<\/li>\n\n\n\n<li>EPCs<\/li>\n\n\n\n<li>Drone cleaning service providers<\/li>\n\n\n\n<li>Buyers testing the T100 Solar Cleaning Kit or Solaris C60V<\/li>\n\n\n\n<li>Sales teams that need evidence before quoting long-term cleaning contracts<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Why kWh\/kWp Is Useful<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">kWh\/kWp normalizes energy production by installed DC capacity. It helps compare two PV blocks of different sizes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Block A produces 4,200 kWh from 1,000 kWp.<\/li>\n\n\n\n<li>Block A output = 4.2 kWh\/kWp.<\/li>\n\n\n\n<li>Block B produces 2,050 kWh from 500 kWp.<\/li>\n\n\n\n<li>Block B output = 4.1 kWh\/kWp.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is still not perfect because irradiance, temperature, inverter clipping, shading and downtime also matter. But it is a useful practical starting point.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Basic A\/B Cleaning Test Design<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Step<\/th><th>Action<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>Select two similar PV blocks<\/td><\/tr><tr><td>2<\/td><td>Record baseline production for several days<\/td><\/tr><tr><td>3<\/td><td>Clean Block A and leave Block B uncleaned<\/td><\/tr><tr><td>4<\/td><td>Record production after cleaning<\/td><\/tr><tr><td>5<\/td><td>Compare kWh\/kWp change<\/td><\/tr><tr><td>6<\/td><td>Review weather, irradiance, downtime and soiling notes<\/td><\/tr><tr><td>7<\/td><td>Decide whether cleaning schedule is economically justified<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Choose Comparable Test Blocks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Select blocks with similar:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Module type<\/li>\n\n\n\n<li>Tilt and azimuth<\/li>\n\n\n\n<li>String\/inverter configuration<\/li>\n\n\n\n<li>Shading exposure<\/li>\n\n\n\n<li>Soiling level<\/li>\n\n\n\n<li>Irradiance exposure<\/li>\n\n\n\n<li>O&amp;M condition<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Avoid comparing a clean, shaded rooftop to a dusty, unshaded ground-mount block. The test will be misleading.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Data to Collect<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Minimum data:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Daily kWh by inverter or block<\/li>\n\n\n\n<li>Installed DC capacity in kWp<\/li>\n\n\n\n<li>Cleaning date and time<\/li>\n\n\n\n<li>Weather notes<\/li>\n\n\n\n<li>Soiling photos<\/li>\n\n\n\n<li>Downtime or fault notes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Better data:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plane-of-array irradiance<\/li>\n\n\n\n<li>Module temperature<\/li>\n\n\n\n<li>Ambient temperature<\/li>\n\n\n\n<li>Soiling sensor data<\/li>\n\n\n\n<li>Performance ratio<\/li>\n\n\n\n<li>Inverter alarms<\/li>\n\n\n\n<li>Water quality and cleaning method<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">NREL&#8217;s PV performance evaluation guidance emphasizes defining the test boundary, collecting accurate uninterrupted data and documenting the procedure so results can be interpreted correctly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Simple Calculation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For each block:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Daily normalized output = daily kWh \/ installed kWp<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then compare:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Post-cleaning improvement = cleaned block kWh\/kWp change &#8211; control block kWh\/kWp change<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cleaned block baseline: 4.0 kWh\/kWp<\/li>\n\n\n\n<li>Cleaned block after cleaning: 4.4 kWh\/kWp<\/li>\n\n\n\n<li>Control block baseline: 4.0 kWh\/kWp<\/li>\n\n\n\n<li>Control block after same period: 4.1 kWh\/kWp<\/li>\n\n\n\n<li>Estimated cleaning effect: (4.4 &#8211; 4.0) &#8211; (4.1 &#8211; 4.0) = 0.3 kWh\/kWp<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Common Mistakes<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Mistake<\/th><th>Better Practice<\/th><\/tr><\/thead><tbody><tr><td>Using photos only<\/td><td>Use photos plus production data<\/td><\/tr><tr><td>Comparing different weather days without context<\/td><td>Use a control block or irradiance normalization<\/td><\/tr><tr><td>Cleaning the worst area and comparing it to the best area<\/td><td>Choose similar blocks<\/td><\/tr><tr><td>Ignoring inverter faults<\/td><td>Remove fault periods or document them<\/td><\/tr><tr><td>Claiming ROI from one short demo<\/td><td>Run repeated tests across soiling seasons<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How Drone Cleaning Fits the Test<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A drone cleaning test should document:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Product used: T100 kit, Solaris C60V or other method<\/li>\n\n\n\n<li>Water type<\/li>\n\n\n\n<li>Nozzle layout<\/li>\n\n\n\n<li>Spray distance<\/li>\n\n\n\n<li>Cleaning time<\/li>\n\n\n\n<li>Number of flights<\/li>\n\n\n\n<li>Water used<\/li>\n\n\n\n<li>Crew size<\/li>\n\n\n\n<li>Area cleaned<\/li>\n\n\n\n<li>Any manual follow-up<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This turns a video demo into an O&amp;M data point.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Is kWh\/kWp enough to prove cleaning ROI?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It is a good practical starting point, but stronger analysis should include irradiance, temperature, downtime and soiling context.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How many days should I measure?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use enough days to reduce weather noise. A single day can be misleading. The exact period depends on site data quality and weather stability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can I compare before and after only?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You can, but A\/B with a control block is better because it helps separate cleaning effect from weather change.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What if the site has tracking systems?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use comparable tracker blocks and make sure tracking faults or stow events are documented.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can drone cleaning remove all soiling?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. Effect depends on soiling type, water quality, nozzle setup, spray distance and surface condition.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Should I use DI water for the test?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use water quality that matches the planned routine operation. If residue risk is important, test RO\/DI water.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How should I report results to a customer?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Report method, test blocks, dates, weather, kWh\/kWp before\/after, limitations and next-step recommendation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can EAUAV help plan a test?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">EAUAV can help buyers define product configuration and cleaning workflow, but the owner or O&amp;M team should manage site data and final performance analysis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Official Source for Further Reading<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NREL PV Performance Modeling Collaborative: https:\/\/pvpmc.sandia.gov\/<\/li>\n\n\n\n<li>NREL soiling research overview: https:\/\/www.nrel.gov\/pv\/soiling.html<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A good solar cleaning demo should produce more than video. It should produce a repeatable test method.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use A\/B kWh\/kWp comparison to decide whether drone cleaning is technically and economically justified for your site.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><br><a href=\"\/contact\">Ask EAUAV for a Solar Cleaning Test Workflow<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Solar cleaning buyers often ask one question: &#8220;How much more power will we get after cleaning?&#8221; The honest answer is: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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