{"id":116240,"date":"2012-10-11T16:56:18","date_gmt":"2012-10-11T14:56:18","guid":{"rendered":"https:\/\/www.sma-sunny.com\/?p=116240"},"modified":"2021-01-05T15:08:08","modified_gmt":"2021-01-05T14:08:08","slug":"coupling-options-for-off-grid-solar-arrays","status":"publish","type":"post","link":"https:\/\/www.sma-sunny.com\/us\/coupling-options-for-off-grid-solar-arrays\/","title":{"rendered":"Coupling Options For Off-Grid Solar Arrays"},"content":{"rendered":"<p>Substantial improvements to off-grid photovoltaic technology during the past decade have led to more choices in off-grid PV system design.<\/p>\n<p>Installers can choose between direct-current (DC) coupling with a charge controller and direct alternating-current (AC) coupling of an off-grid or grid-tied inverters to the AC bus for these applications. The appropriate coupling method varies by project.<!--more--><\/p>\n<h5 style=\"text-align: left;\">Advantages to Both Methods<\/h5>\n<p>Both AC- and DC-coupled systems provide a renewable energy source where power normally is not feasible, but there are advantages and challenges to both methods.<\/p>\n<p>Traditional off-grid systems are DC-coupled. The battery bank is charged by connecting solar modules to a large charge controller, which regulates both the voltage and current.<\/p>\n<p>With AC coupling, an AC-synchronous solar inverter is directly connected to the AC loads panel. The DC battery bank powers the DC-to-AC inverter, with solar production fed to the AC loads panel. Any extra power on the AC bus is converted to DC to charge the batteries.<\/p>\n<p>Find real-world examples of off-grid AC-coupled and DC-coupled systems, and learn why AC coupling could offer more advantages, in the September 2012 issue of <em>Solar Industry<\/em> magazine. <a href=\"http:\/\/www.solarindustrymag.com\/digitaleditions\/Main.php?MagID=3&amp;MagNo=54\" target=\"_blank\" rel=\"noopener noreferrer\">\u201cCoupling Options For Off-Grid Solar Arrays: DC Versus AC Setups\u201d<\/a> begins on page 48.<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;116240&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;1&quot;,&quot;greet&quot;:&quot;&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votes)&quot;,&quot;size&quot;:&quot;22&quot;,&quot;title&quot;:&quot;Coupling Options For Off-Grid Solar Arrays&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 1px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 17.6px;\">\n            <span class=\"kksr-muted\"><\/span>\n    <\/div>\n    <\/div>\n<div class='printomatic pom-default ' id='id9621'  data-print_target='article'><\/div>","protected":false},"excerpt":{"rendered":"<p>Substantial improvements to off-grid photovoltaic technology during the past decade have led to more choices in off-grid PV system design&#8230;.<\/p>\n","protected":false},"author":97,"featured_media":128513,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1715],"tags":[1369,1371,1370],"class_list":["post-116240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solutions","tag-ac-dc-coupling","tag-off-grid","tag-pv-design"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Coupling Options For Off-Grid Solar Arrays - Sunny. 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