{"id":6870,"date":"2024-02-01T17:51:15","date_gmt":"2024-02-01T15:51:15","guid":{"rendered":"https:\/\/voltgrid.ro\/?p=6870"},"modified":"2024-02-01T17:51:22","modified_gmt":"2024-02-01T15:51:22","slug":"cum-alegi-sistemul-fotovoltaic-6-lucruri-de-stiut","status":"publish","type":"post","link":"https:\/\/voltgrid.ro\/en\/cum-alegi-sistemul-fotovoltaic-6-lucruri-de-stiut\/","title":{"rendered":"How to choose the photovoltaic system 6 things to know"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<h2 class=\"wp-block-heading has-medium-font-size\">How to choose the photovoltaic system: what you need to know before buying and installing a photovoltaic system <\/h2>\n\n\n\n<p><strong>Practical guide to photovoltaic systems<\/strong>: the mounting location, the resistant roof, the avoidance of shade and the adaptation of the network for efficient production. Advice on orientation and consumption calculation, essential before investing in solar energy<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Content<\/h2><nav><ol><li><a href=\"#locul-de-montaj\">The place of assembly<\/a><\/li><li><a href=\"#acoperi\u0219ul\">The roof<\/a><\/li><li><a href=\"#umbra\">The Shadow<\/a><\/li><li><a href=\"#tipul-\u0219i-tensiunea-re\u021belei\">Mains type and voltage<\/a><\/li><li><a href=\"#priza-de-pamant\">Earth socket<\/a><\/li><li><a href=\"#consumul-tau-actual\">Your current consumption<\/a><\/li><\/ol><\/nav><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"locul-de-montaj\">The place of assembly<\/h3>\n\n\n\n<figure class=\"wp-block-image alignright size-medium is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"450\" height=\"299\" src=\"https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-450x299.jpeg\" alt=\"Cum alegi sistemul fotovoltaic: Montaj acoperis sisteme fotovoltaice\" class=\"wp-image-6874\" style=\"width:350px\" title=\"\" srcset=\"https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-450x299.jpeg 450w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-1200x798.jpeg 1200w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-768x510.jpeg 768w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-1536x1021.jpeg 1536w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice-600x399.jpeg 600w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Montaj-acoperis-sisteme-fotovoltaice.jpeg 1920w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/figure>\n\n\n\n<p style=\"padding-top:0\">First of all, there must be an assembly place whose orientation is not towards the North.<\/p>\n\n\n\n<p>The best surface in terms of orientation is the <strong>facing South<\/strong>, you can also opt for the East-West option.<\/p>\n\n\n\n<p>If the mounting place is the roof of the house or an annex, and the orientation of the slope (water) is only on the East or only on the West, you must take into account the fact that half of the day the production will be minimal.<\/p>\n\n\n\n<p>The East-West orientation is chosen when it is possible to mount the panels both on the west side and on the east side, so the system will produce energy from the panels on the east (sunrise) in the morning and from the panels on the west (sunset) at noon and in the evening.<\/p>\n\n\n\n<p>Also in the chapter on the place of installation, it should also be specified that the angle of inclination of the roof or the structure on which the photovoltaic panels are mounted will be directly proportional to the production of the system.<\/p>\n\n\n\n<p>In Romania, the suitable mounting angle for photovoltaic panels is between <strong>25-35 degrees<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"acoperi\u0219ul\">The roof<\/h3>\n\n\n\n<p>Second, but equally, you must ensure that the roof or structure on which the panels will be mounted has <strong>Mechanical resistence<\/strong> for a weight of approximately 10 kg\/m2 where snow loads or the influence of wind are also taken into account.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"umbra\">The Shadow<\/h3>\n\n\n\n<p>Third, you need to make sure that the place where you want to mount the panels <strong>it is not shaded<\/strong>. Shading a single PV panel will drastically decrease the output of the entire system. Certain inverters, such as those from <a href=\"\/en\/producator\/huawei\/\">Huawei<\/a>, can reduce the effects of shading by installing de <a href=\"\/en\/produse\/optimizatoare\/\">Optimum<\/a> on each panel. These optimizers also have the role of protecting the photovoltaic system, through the &quot;rapid shut-down&quot; function, which, upon detection of rapid heating, such as an electric arc, disconnects the entire assembly of panels in a maximum of 3 seconds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"tipul-\u0219i-tensiunea-re\u021belei\">Mains type and voltage<\/h3>\n\n\n\n<figure class=\"wp-block-image alignright size-medium is-resized\"><img decoding=\"async\" width=\"450\" height=\"292\" src=\"https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Voltmetru-450x292.webp\" alt=\"VoltGrid Fotovoltaice\" class=\"wp-image-6875\" style=\"width:350px\" title=\"\" srcset=\"https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Voltmetru-450x292.webp 450w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Voltmetru-768x498.webp 768w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Voltmetru-600x389.webp 600w, https:\/\/voltgrid.ro\/wp-content\/uploads\/2024\/02\/Voltmetru.webp 1000w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/figure>\n\n\n\n<p style=\"padding-top:var(--wp--preset--spacing--20)\">Regarding the network type, you should know that for a <strong>single phase system<\/strong> expenses are lower than for a three-phase system.<\/p>\n\n\n\n<p>Regarding the network voltage, it should be known that the average value of the voltage in the national energy system is 230V line voltage and 400V phase voltage. If you notice flickering of the bulbs or increases in the luminous intensity of the bulbs, you should first measure the voltage in your home. If it is observed that the voltage drops below 200V or increases to 250V, you will have problems with frequent restarts of the inverter, or in certain cases, the power of the photovoltaic system must be limited. These restarts last 10 minutes, and during this time the system will not be able to produce energy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"priza-de-pamant\">Earth socket<\/h3>\n\n\n\n<p>If you know that you don&#039;t have grounding done at home, or it&#039;s not done properly, you have to consider an outlet <strong>separate land<\/strong>, or improved the existing one. The standard value of the resistance of the earth socket at the national level is 4 Ohms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"consumul-tau-actual\">Your current consumption<\/h3>\n\n\n\n<p>Which type of system to choose depending on <strong>your current consumption<\/strong>.<\/p>\n\n\n\n<p>One of the most important aspects in choosing your photovoltaic system is the current consumption of your home. Depending on this own consumption and the available mounting surface, you can choose the technical-economical system that suits you.<\/p>\n\n\n\n<p>Below, it was calculated with the software <a href=\"https:\/\/pvwatts.nrel.gov\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/pvwatts.nrel.gov\/\" rel=\"noreferrer noopener\">PVWatts Calculator<\/a>, the energy production of selected photovoltaic systems of 3kW, 5kW and 6kW:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Chosen system<\/strong><\/td><td><strong>Average monthly production<\/strong><\/td><td><strong>Available area<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/voltgrid.ro\/en\/product\/kit-panouri-fotovoltaice-3-kw-monofazat-ongrid\/\">3kW<\/a><\/td><td>340 kWh<\/td><td>18 m2<\/td><\/tr><tr><td><a href=\"https:\/\/voltgrid.ro\/en\/product\/kit-panouri-fotovoltaice-5-kw-monofazat-ongrid\/\">5kW<\/a><\/td><td>567 kWh<\/td><td>26 m2<\/td><\/tr><tr><td><a href=\"https:\/\/voltgrid.ro\/en\/product\/kit-panouri-fotovoltaice-6-kw-monofazat-ongrid\/\">6KW<\/a><\/td><td>670 kWh<\/td><td>32 m2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>If you do not fit these values and want calculations for larger systems, do not hesitate to contact us.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column has-ast-global-color-4-background-color has-background is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--30);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--30)\">\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f3449-o1\" lang=\"ro-RO\" dir=\"ltr\" data-wpcf7-id=\"3449\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/en\/wp-json\/wp\/v2\/posts\/6870#wpcf7-f3449-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/en\/wp-json\/wp\/v2\/posts\/6870#wpcf7-f3449-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"3449\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.5\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"ro_RO\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f3449-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_wpcf7_recaptcha_response\" value=\"\" \/>\n<\/fieldset>\n<p><label> <strong>Your name<\/strong> <span style=\"color:#1CAE70\">*<\/span><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Name and surname\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span> <\/label>\n<\/p>\n<p><label> <strong>Phone <\/strong> <span style=\"color:#1CAE70\">*<\/span><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"form-telefon\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-tel\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"07...\" value=\"\" type=\"tel\" name=\"form-telefon\" \/><\/span><\/label>\n<\/p>\n<p><label> <strong>E-mail<\/strong> *<br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span> <\/label>\n<\/p>\n<p><label> <strong>Address<\/strong><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"form-adresa\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"Address for installation\/delivery\" value=\"\" type=\"text\" name=\"form-adresa\" \/><\/span> <\/label>\n<\/p>\n<p><label> <strong>System power (kW)<\/strong><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"form-putere-sistem-kw\"><input class=\"wpcf7-form-control wpcf7-number wpcf7-validates-as-number\" aria-invalid=\"false\" value=\"\" type=\"number\" name=\"form-putere-sistem-kw\" \/><\/span> <\/label>\n<\/p>\n<p><label> <strong>Choose service<\/strong><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"your-subject\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"your-subject\"><option value=\"-- Alege un serviciu --\">-- Choose a service --<\/option><option value=\"Sisteme fotovoltaice\">Photovoltaic systems<\/option><option value=\"Instala\u021bii fotovoltaice\">Photovoltaic installations<\/option><option value=\"Magazin\">Store<\/option><option value=\"Comenzi\">Orders<\/option><option value=\"Livrare\">Delivery<\/option><option value=\"Altele\">Other<\/option><\/select><\/span> <\/label>\n<\/p>\n<p><label> <strong>Your message<\/strong><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"form-mesaj\"><textarea cols=\"40\" rows=\"2\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" name=\"form-mesaj\"><\/textarea><\/span> <\/label>\n<\/p>\n<p><!-- Mailchimp for WordPress v4.12.2 - https:\/\/www.mc4wp.com\/ --><input type=\"hidden\" name=\"_mc4wp_subscribe_contact-form-7\" value=\"0\" \/><span class=\"mc4wp-checkbox mc4wp-checkbox-contact-form-7\"><label><input type=\"checkbox\" name=\"_mc4wp_subscribe_contact-form-7\" value=\"1\" checked=\"checked\"><span>Subscribe to my newsletter for exclusive offers<\/span><\/label><\/span><!-- \/ Mailchimp for WordPress -->\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"send\" \/>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>\u0394<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"_wpcf7_ak_js\" value=\"155\"\/><script>\ndocument.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );\n<\/script>\n<\/p><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"en\"\/><\/form>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<p>We hope this article helps you and convinces you to invest in photovoltaic energy.<\/p>\n\n\n\n<p>Now that you have found out how to choose the photovoltaic system, we recommend that you also find out what you need to do to become a prosumer:<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/voltgrid.ro\/en\/ghid-prosumator\/\">The prosumer&#039;s guide<\/a><\/div>\n<\/div>\n\n\n\n<p style=\"padding-top:2em\">Sunny days!<\/p>\n\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div>","protected":false},"excerpt":{"rendered":"<p>How to choose the photovoltaic system: practical guide on the installation site, resistant roof, avoiding the shadow and adapting the network for efficient production<\/p>","protected":false},"author":6,"featured_media":6873,"comment_status":"open","ping_status":"closed","sticky":true,"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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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