{"id":7586,"date":"2026-07-30T10:55:43","date_gmt":"2026-07-30T02:55:43","guid":{"rendered":"https:\/\/hobertek.com\/how-to-size-a-solar-pump-inverter-the-engineering-guide-to-ac-pump-solarization-2026\/"},"modified":"2026-07-30T10:55:43","modified_gmt":"2026-07-30T02:55:43","slug":"how-to-size-a-solar-pump-inverter-the-engineering-guide-to-ac-pump-solarization-2026","status":"publish","type":"post","link":"https:\/\/hobertek.com\/pt\/how-to-size-a-solar-pump-inverter-the-engineering-guide-to-ac-pump-solarization-2026\/","title":{"rendered":"Como dimensionar um inversor para bomba solar: o guia de engenharia para solariza\u00e7\u00e3o de bombas CA (2026)"},"content":{"rendered":"<p><strong>To correctly size a solar pump inverter for an existing AC pump, you must match the inverter\u2019s Rated Output Current to the motor\u2019s Full Load Amps (FLA), typically applying a 1.15x safety margin. Sizing by kW alone is a common field error that leads to premature IGBT failure. Additionally, the PV array configuration must ensure the Vmp stays within the inverter&#8217;s MPPT window while the Voc never exceeds the maximum DC input voltage at the site\u2019s lowest temperature.<\/strong><\/p>\n<h2>Step 1: The &#8220;Current Over Power&#8221; Rule<\/h2>\n<p>Na pr\u00e1tica, vemos com frequ\u00eancia instaladores que combinam um inversor de 7,5 kW com uma bomba de 7,5 kW e se perguntam por que ele desliga por sobrecorrente.<\/p>\n<p><strong>A Verdade:<\/strong> Power ratings are nominal. The real work is done by current. If your pump&#8217;s FLA (Full Load Amps) is 15A, your inverter must be able to deliver that current continuously under solar fluctuations.<\/p>\n<ul>\n<li><strong>A f\u00f3rmula:<\/strong> Corrente de sa\u00edda do inversor (A) \u2265 Corrente nominal do motor (A) \u00d7 1,15<\/li>\n<li><strong>Por que?<\/strong> Solar inputs are variable. High-inertia starts or slight mechanical wear on the pump can cause current spikes. If your inverter doesn&#8217;t have the &#8220;headroom,&#8221; it will trigger protection or burn out.<\/li>\n<\/ul>\n<h2>Etapa 2: Janelas de tens\u00e3o do arranjo fotovoltaico (Voc vs. Vmp)<\/h2>\n<p>Um inversor para bomba solar n\u00e3o \u00e9 um carregador de baterias; \u00e9 um controlador MPPT de alta velocidade. A efici\u00eancia depende inteiramente da correspond\u00eancia de tens\u00e3o.<\/p>\n<ul>\n<li><strong>Vmp (Tens\u00e3o na Pot\u00eancia M\u00e1xima):<\/strong> Your string\u2019s combined Vmp must be at the center of the inverter&#8217;s MPPT range (e.g., 530V-580V for a 380V AC system) to ensure 100% pump frequency even during passing clouds.<\/li>\n<li><strong>Voc (Tens\u00e3o de Circuito Aberto):<\/strong> <strong>Nunca<\/strong> design your string to hit more than 90% of the inverter&#8217;s max DC input. If the inverter max is 800V, keep your Voc below 720V. Cold mornings in regions like the Middle East or Andes can spike Voc by 10-15%, instantly frying the input capacitors.<\/li>\n<\/ul>\n<h2>Step 3: The Site-Specific &#8220;Correction Factors&#8221;<\/h2>\n<p>Standard data sheets assume 25&deg;C and sea level. Real-world engineering doesn&#8217;t. HOBER inverters are built for extreme environments, but physics still applies.<\/p>\n<ol>\n<li><strong>Altitudes elevadas (&gt;3000m):<\/strong> O ar rarefeito significa m\u00e1 dissipa\u00e7\u00e3o de calor. Em cidades como La Paz ou no Peru, em altitudes elevadas, voc\u00ea precisa <strong>Dimensionar o inversor em uma unidade de pot\u00eancia superior \u00e0 nominal<\/strong> (por exemplo, usar um inversor de 11 kW para uma bomba de 7,5 kW) para compensar a redu\u00e7\u00e3o de pot\u00eancia.<\/li>\n<li><strong>Calor extremo (acima de 50\u00b0C):<\/strong> Se a temperatura no seu local atingir 50\u00b0C (Paquist\u00e3o, Sud\u00e3o), as unidades com ventila\u00e7\u00e3o for\u00e7ada falhar\u00e3o. Voc\u00ea precisa de uma <strong>Arquitetura de tripla refrigera\u00e7\u00e3o<\/strong> (Selado IP65 + Dissipadores de calor externos + Ventila\u00e7\u00e3o for\u00e7ada) para manter a sa\u00edda de 50Hz.<\/li>\n<\/ol>\n<h3>Tabela de refer\u00eancia de medidas r\u00e1pidas (padr\u00e3o B2B)<\/h3>\n<table style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Pot\u00eancia da bomba<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Fase do motor<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Inversor recomendado<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Pot\u00eancia m\u00ednima fotovoltaica<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>2,2 kW \/ 3 HP<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Trif\u00e1sico 220V<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">2.2kW &#8211; 3.7kW<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">3,3 kWp<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>7,5 kW \/ 10 HP<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Trif\u00e1sico 380V<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">7.5kW &#8211; 11kW<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">11,2 kWp<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>15 kW \/ 20 HP<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">Trif\u00e1sico 380V<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">15kW &#8211; 18.5kW<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">22,5 kWp<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Passo 4: O Perigo do Cabo Longo<\/h2>\n<p>If your borehole is deeper than 100m, the voltage drop and reflected wave phenomenon will destroy your motor&#8217;s insulation.<\/p>\n<ul>\n<li><strong>Regra de Engenharia:<\/strong>\n<ul>\n<li><strong>100m &#8211; 200m:<\/strong> Instale um reator de sa\u00edda.<\/li>\n<li><strong>&gt;200m:<\/strong> Instale um filtro de onda senoidal.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Os inversores HOBER IP65 s\u00e3o projetados para lidar com essas cargas indutivas, mas a prote\u00e7\u00e3o \u00e9 imprescind\u00edvel para a longevidade do sistema.<\/p>\n<hr \/>\n<h2>Procurando por uma sele\u00e7\u00e3o de sistema profissional?<\/h2>\n<p>A l\u00f3gica acima serve para dimensionamento preliminar. Para obter a lista completa de materiais (BOM), configura\u00e7\u00f5es de strings e pre\u00e7os exclusivos para revendedores para o seu projeto espec\u00edfico, visite nossa Academia.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/hobertek.com\/pt\/ac-pump-solarization-academy\/\" class=\"button\">Visite a Academia de Solariza\u00e7\u00e3o de Bombas de Ar Condicionado<\/a><\/p>\n<hr \/>\n<h3>Perguntas frequentes sobre o dimensionamento de inversores para bombas solares<\/h3>\n<div class=\"faq-section\">\n<p><strong>P: Posso usar um inversor monof\u00e1sico para uma bomba trif\u00e1sica?<\/strong><br \/>R: N\u00e3o. A fase e a tens\u00e3o de sa\u00edda do inversor devem corresponder \u00e0s especifica\u00e7\u00f5es do motor. O uso de inversores h\u00edbridos HOBER permite converter a entrada fotovoltaica monof\u00e1sica em sa\u00edda trif\u00e1sica para bombas padr\u00e3o.<\/p>\n<p><strong>P: Como lidar com cargas acima de 500 HP?<\/strong><br \/>A: Para irriga\u00e7\u00e3o em larga escala (pomares de citrinos, etc.), utilizamos pain\u00e9is de controlo industriais com capacidade de entrada de 1130 A ou superior e sincroniza\u00e7\u00e3o de m\u00faltiplos inversores. Contacte a nossa equipa de engenharia para obter informa\u00e7\u00f5es sobre solu\u00e7\u00f5es t\u00e9cnicas de alta pot\u00eancia.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Para dimensionar corretamente um inversor de bomba solar para uma bomba CA existente, voc\u00ea deve compatibilizar a corrente de sa\u00edda nominal do inversor com a corrente de plena carga do motor.<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>","protected":false},"author":4,"featured_media":7513,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","om_disable_all_campaigns":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"_joinchat":[],"footnotes":"","jetpack_post_was_ever_published":false},"categories":[76,212],"tags":[266,281,168],"class_list":["post-7586","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-pump-inverter","category-solutions","tag-ac-pump-solarization","tag-hybrid-pumping","tag-sizing"],"jetpack_featured_media_url":"https:\/\/hobertek.com\/wp-content\/uploads\/2026\/07\/Hober-Solar-Pump-Inverter-IP65-Cooling-Test-in-Saudi-Arabia.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/posts\/7586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/comments?post=7586"}],"version-history":[{"count":0,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/posts\/7586\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/media\/7513"}],"wp:attachment":[{"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/media?parent=7586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/categories?post=7586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hobertek.com\/pt\/wp-json\/wp\/v2\/tags?post=7586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}