{"id":3080,"date":"2018-02-12T13:24:39","date_gmt":"2018-02-12T13:24:39","guid":{"rendered":"http:\/\/nastec.eu\/en\/?page_id=3080"},"modified":"2019-01-17T14:34:44","modified_gmt":"2019-01-17T14:34:44","slug":"pv-system-sizing","status":"publish","type":"page","link":"https:\/\/nastec.eu\/en\/solar-energy-products\/vasco-solar\/pv-system-sizing\/","title":{"rendered":"PV system sizing"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_half-f72e7ad6b64d2d9bf1d798755ec1ce61\">\n.flex_column.av-av_one_half-f72e7ad6b64d2d9bf1d798755ec1ce61{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_half-f72e7ad6b64d2d9bf1d798755ec1ce61 av_one_half  avia-builder-el-0  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-animated-generic bottom-to-top av-zero-column-padding  '     ><section  class='av_textblock_section av-av_textblock-2de302bf1aa3cf4c9157dbe6f50ac7eb '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>PV system sizing.<\/h1>\n<p>The pumping system must be designed taking into account the required daily flow rate, total head and the installation site.<\/p>\n<p>In particular, the choice of the pump must be made considering the average daily solar irradiation.<\/p>\n<p>Once the appropriate pump has been identified, it is necessary to know:<\/p>\n<ul>\n<li>Rated pump power (P2)<\/li>\n<li>Electrical motor power (P1). P1 can be derived by dividing P2 by motor efficiency.<\/li>\n<li>Rated motor current<\/li>\n<li>Rated motor voltage<br \/>\n3 x 230 VAC or<br \/>\n3 x 400 VAC<\/li>\n<\/ul>\n<p>The model to be used is determined by considering voltage and rated motor current.<\/p>\n<p>To ensure maximum performance, the solar system &#8211; consisting of one or more strings of solar panels connected in series &#8211; must provide:<\/p>\n<p><strong>Electrical motor power (P1).<\/strong>\u00a0\u00f9The photovoltaic power (Wp) must be at least equal to the electric motor power (P1). Typically, taking into account the efficiency loss due to panel temperature, it is recommended to increase Wp by 15% with respect to P1.<\/p>\n<p><strong>Rated motor voltage.<\/strong> The rated voltage of each string of solar panels (Vmp) must be at least equal to the rated motor voltage multiplied by the factor 1.4.<\/p>\n<p><strong>The open-circuit voltage<\/strong> of each string (Voc) must be less than device maximum operating voltage.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_half-2b6e8fc9001745db14141990129321f7\">\n.flex_column.av-av_one_half-2b6e8fc9001745db14141990129321f7{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 25px;\n}\n<\/style>\n<div  class='flex_column av-av_one_half-2b6e8fc9001745db14141990129321f7 av_one_half  avia-builder-el-2  el_after_av_one_half  el_before_av_hr  flex_column_div av-animated-generic bottom-to-top  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-8a719b61b0b74fbce6bfbafa94d57dc4\">\n.avia-image-container.av-av_image-8a719b61b0b74fbce6bfbafa94d57dc4 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-8a719b61b0b74fbce6bfbafa94d57dc4 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-8a719b61b0b74fbce6bfbafa94d57dc4 av-styling- avia-align-center  avia-builder-el-3  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-5536 avia-img-lazy-loading-not-5536 avia_image ' src=\"https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN.png\" alt='' title='PV-system-sizing-illustration-IT-EN'  height=\"1202\" width=\"475\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN.png 475w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-119x300.png 119w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-407x1030.png 407w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-279x705.png 279w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-395x999.png 395w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-9x24.png 9w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-14x36.png 14w, https:\/\/nastec.eu\/en\/wp-content\/uploads\/2018\/02\/PV-system-sizing-illustration-IT-EN-19x48.png 19w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><\/div><\/div><\/div><\/div><\/p>\n<div  class='hr av-av_hr-0ff602b3e980a3377077ff3c1c834df6 hr-default  avia-builder-el-4  el_after_av_one_half  el_before_av_one_half '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_half-826c1c0ca2001783299b013bb6b50dff\">\n.flex_column.av-av_one_half-826c1c0ca2001783299b013bb6b50dff{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_half-826c1c0ca2001783299b013bb6b50dff av_one_half  avia-builder-el-5  el_after_av_hr  el_before_av_one_half  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-av_textblock-2de302bf1aa3cf4c9157dbe6f50ac7eb '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>Example.<\/h1>\n<p><b><span class=\"cf1 ff6 fs18\">Pump nameplate<br \/>\n<\/span><\/b>Rated motor power: P2 = 3 kW<br \/>\nElectric motor power: P1 = 4 kW<br \/>\nRated motor current: 8.3 A<br \/>\nRated motor voltage: 3 x 400 VAC<\/p>\n<p><b>VASCO Solar selection<br \/>\n<\/b>The rated motor voltage being 400 VAC and the rated current 8.3 A, the most suitable model for the application is VS 409.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_half-c8fc129dc35fd1ae2a1e410224d39ea8\">\n.flex_column.av-av_one_half-c8fc129dc35fd1ae2a1e410224d39ea8{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_half-c8fc129dc35fd1ae2a1e410224d39ea8 av_one_half  avia-builder-el-7  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-av_textblock-2de302bf1aa3cf4c9157dbe6f50ac7eb '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1><\/h1>\n<p><b>PV system sizing<br \/>\n<\/b><br \/>\nPV panels used:<br \/>\nWp = 240 W<br \/>\nVmp = 30 VDC<br \/>\nVoc = 37 VDC<br \/>\nImp = 8 A<\/p>\n<p>Since P1 = 4 kW the required electrical power is increased by 15% so Wp = 4.6 kW.<\/p>\n<p>To develop 4.6 kW 19 panels of 240 W are needed.<\/p>\n<p>Vmp = 19 x 30 = 570 VDC is greater than the rated motor voltage multiplied by 1.4 (400 x 1.4 = 560 VDC) and<br \/>\nVoc = 19 x 37 = 703 VDC is less than the maximum voltage of VASCO Solar 409 (850 VDC).<\/p>\n<p>For this reason a single string of 19 panels can be installed.<\/p>\n<\/div><\/section><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":273,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[36],"tags":[37,38],"class_list":["post-3080","page","type-page","status-publish","hentry","category-focus-vasco-solar","tag-focus-vasco-solar","tag-vasco-solar"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PV system sizing<\/title>\n<meta name=\"description\" content=\"Nastec Vasco Solar - PV system sizing\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nastec.eu\/en\/solar-energy-products\/vasco-solar\/pv-system-sizing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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