{"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\/fr\/how-to-size-a-solar-pump-inverter-the-engineering-guide-to-ac-pump-solarization-2026\/","title":{"rendered":"Comment dimensionner un onduleur pour pompe solaire\u00a0: Guide technique de la solarisation des pompes \u00e0 courant alternatif (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>Sur le terrain, nous voyons souvent des installateurs qui raccordent un onduleur de 7,5 kW \u00e0 une pompe de 7,5 kW et se demandent pourquoi il se d\u00e9clenche en cas de surintensit\u00e9.<\/p>\n<p><strong>La v\u00e9rit\u00e9:<\/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>La formule :<\/strong> Courant de sortie de l&#039;onduleur (A) \u2265 Courant nominal du moteur (A) \u00d7 1,15<\/li>\n<li><strong>Pourquoi?<\/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>\u00c9tape 2\u00a0: Fen\u00eatres de tension du g\u00e9n\u00e9rateur photovolta\u00efque (Voc vs. Vmp)<\/h2>\n<p>Un onduleur pour pompe solaire n&#039;est pas un chargeur de batterie\u00a0; c&#039;est un variateur MPPT haute vitesse. Son rendement d\u00e9pend enti\u00e8rement de l&#039;adaptation de tension.<\/p>\n<ul>\n<li><strong>Vmp (tension \u00e0 puissance maximale) :<\/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 (tension en circuit ouvert) :<\/strong> <strong>Jamais<\/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>Haute altitude (&gt;3000 m) :<\/strong> L&#039;air rar\u00e9fi\u00e9 entra\u00eene une mauvaise dissipation de la chaleur. Dans des villes comme La Paz ou en altitude au P\u00e9rou, il faut\u2026 <strong>Surdimensionnez l&#039;onduleur d&#039;une puissance nominale.<\/strong> (par exemple, utiliser un onduleur de 11 kW pour une pompe de 7,5 kW) pour compenser la r\u00e9duction de puissance.<\/li>\n<li><strong>Chaleur extr\u00eame (50 \u00b0C et plus) :<\/strong> Si votre site atteint 50 \u00b0C (Pakistan, Soudan), les unit\u00e9s refroidies par ventilateur ne fonctionneront pas. Vous avez besoin d&#039;un <strong>Architecture \u00e0 triple refroidissement<\/strong> (\u00c9tanch\u00e9it\u00e9 IP65 + dissipateurs thermiques externes + ventilation forc\u00e9e) pour maintenir une sortie de 50 Hz.<\/li>\n<\/ol>\n<h3>Tableau de r\u00e9f\u00e9rence rapide des dimensions (norme 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;\">Puissance de la pompe<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Phase moteur<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Onduleur recommand\u00e9<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd;\">Puissance PV minimale<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>2,2 kW \/ 3 CV<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">triphas\u00e9 220 V<\/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 kWc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>7,5 kW \/ 10 ch<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">triphas\u00e9 380 V<\/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 kWc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>15 kW \/ 20 ch<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">triphas\u00e9 380 V<\/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 kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u00c9tape 4\u00a0: Le danger du long c\u00e2ble<\/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>R\u00e8gle d&#039;ing\u00e9nierie :<\/strong>\n<ul>\n<li><strong>100m &#8211; 200m:<\/strong> Installer un r\u00e9acteur de sortie.<\/li>\n<li><strong>&gt;200 m :<\/strong> Installez un filtre \u00e0 onde sinuso\u00efdale.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Les onduleurs HOBER IP65 sont con\u00e7us pour supporter ces charges inductives, mais la protection est indispensable pour la long\u00e9vit\u00e9 du syst\u00e8me.<\/p>\n<hr \/>\n<h2>Vous recherchez une s\u00e9lection de syst\u00e8mes professionnels\u00a0?<\/h2>\n<p>Le raisonnement ci-dessus concerne un dimensionnement pr\u00e9liminaire. Pour obtenir la nomenclature compl\u00e8te, les configurations de c\u00e2blage et les tarifs exclusifs r\u00e9serv\u00e9s aux revendeurs pour votre projet sp\u00e9cifique, consultez notre Acad\u00e9mie.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/hobertek.com\/fr\/ac-pump-solarization-academy\/\" class=\"button\">Visitez l&#039;Acad\u00e9mie de Solarisation des Pompes AC<\/a><\/p>\n<hr \/>\n<h3>FAQ sur le dimensionnement des onduleurs pour pompes solaires<\/h3>\n<div class=\"faq-section\">\n<p><strong>Q : Puis-je utiliser un onduleur monophas\u00e9 pour une pompe triphas\u00e9e ?<\/strong><br \/>R : Non. La phase et la tension de sortie de l&#039;onduleur doivent correspondre aux indications de la plaque signal\u00e9tique du moteur. L&#039;utilisation d&#039;onduleurs hybrides HOBER permet de convertir un courant photovolta\u00efque monophas\u00e9 en un courant triphas\u00e9 pour les pompes standard.<\/p>\n<p><strong>Q : Comment g\u00e9rer des charges de plus de 500 CV ?<\/strong><br \/>A : Pour l&#039;irrigation \u00e0 grande \u00e9chelle (vergers d&#039;agrumes, etc.), nous utilisons des armoires de commande industrielles d&#039;une capacit\u00e9 d&#039;entr\u00e9e de plus de 1130 A et avec synchronisation multi-variateurs. Contactez notre \u00e9quipe d&#039;ing\u00e9nieurs pour obtenir des solutions techniques haute puissance.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Pour dimensionner correctement un onduleur de pompe solaire pour une pompe \u00e0 courant alternatif existante, vous devez faire correspondre le courant de sortie nominal de l&#039;onduleur \u00e0 l&#039;amp\u00e9rage \u00e0 pleine charge du moteur.<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\/fr\/wp-json\/wp\/v2\/posts\/7586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/comments?post=7586"}],"version-history":[{"count":0,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/posts\/7586\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/media\/7513"}],"wp:attachment":[{"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/media?parent=7586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/categories?post=7586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hobertek.com\/fr\/wp-json\/wp\/v2\/tags?post=7586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}