{"id":20866,"date":"2026-11-05T10:07:12","date_gmt":"2026-11-05T02:07:12","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/inverter-charger-ac-input-charging-source-budget\/"},"modified":"2026-11-05T10:07:12","modified_gmt":"2026-11-05T02:07:12","slug":"inverter-charger-ac-input-charging-source-budget","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/","title":{"rendered":"Inverter-Charger AC Input Budget: Specify the Charging Source"},"content":{"rendered":"<figure class=\"hero\"><a href=\"https:\/\/www.wehopower.com\/de\/product\/whpu-1500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/hero-16.webp\" alt=\"Inverter-Charger AC Input Budget: Specify the Charging Source  title=\" fetchpriority=\"high\" inverter-charger ac input budget: specify the charging source title=\"\"><\/a><figcaption>Charging-input observation layout: a blank inline AC monitor sits between a shared source and the separate rear field interface, while another AC load branches directly from that source. Both inverter output sockets are unused. Hidden factory rear connections, instrument\/source ratings and battery compatibility remain unverified. AI-assisted illustration.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-9.jpg\">View original product image<\/a><\/figure>\n<p><strong>Specify the AC charging source from the charger\u2019s actual input demand and permitted operating states.<\/strong> The inverter\u2019s output wattage is a different rating. Dividing it by the AC source voltage does not establish the charging input current.<\/p>\n<p>An OEM considering the <a href=\"https:\/\/www.wehopower.com\/de\/product\/whpu-1500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-1500 inverter\/charger family<\/a> should request a charger-specific input envelope and build a source budget around it. This article supplies the calculation and record structure without assigning an undocumented charge current or transfer topology.<\/p>\n<nav class=\"toc\" aria-label=\"On this page\">\n<ol>\n<li><a href=\"#identify-input-loads\">Identify what the AC input actually supplies<\/a><\/li>\n<li><a href=\"#page-definition\">Use a charger-specific specification<\/a><\/li>\n<li><a href=\"#input-calculation\">Show how charging power becomes AC current<\/a><\/li>\n<li><a href=\"#cover-operating-envelope\">Budget the charging envelope and the other source loads<\/a><\/li>\n<li><a href=\"#verify-source\">Verify the intended source and charging state together<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"identify-input-loads\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inhaltsverzeichnis<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Umschalten<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Identify_what_the_AC_input_actually_supplies\" >Identify what the AC input actually supplies<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Use_a_charger-specific_specification\" >Use a charger-specific specification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Show_how_charging_power_becomes_AC_current\" >Show how charging power becomes AC current<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Budget_the_charging_envelope_and_the_other_source_loads\" >Budget the charging envelope and the other source loads<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Verify_the_intended_source_and_charging_state_together\" >Verify the intended source and charging state together<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Request_the_charging-input_envelope\" >Request the charging-input envelope<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#AC_charging-source_budget\" >AC charging-source budget<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/de\/news\/inverter-charger-ac-input-charging-source-budget\/#Sources_and_further_reading\" >Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Identify_what_the_AC_input_actually_supplies\"><\/span>Identify what the AC input actually supplies<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>First confirm the exact unit\u2019s permitted functions: charging, inverter operation and any independently documented feed-through state. A charger function alone does not establish that AC input also supplies the output sockets, or that a load is automatically transferred between sources.<\/p>\n<p>Draw the allowed state at system level and list every AC load on the proposed source. Other equipment supplied directly by that source belongs in the source budget even if it never passes through the inverter\/charger.<\/p>\n<p>If the source is a generator, an upstream inverter or a shared circuit, retain its continuous capability, voltage\/frequency range and relevant transient behavior. Equal nominal watts do not guarantee an acceptable charger-source combination.<\/p>\n<\/section>\n<section id=\"page-definition\">\n<h2><span class=\"ez-toc-section\" id=\"Use_a_charger-specific_specification\"><\/span>Use a charger-specific specification<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The WHPU-1500 page identifies the family and 12 V\/24 V variants. Its introductory paragraph refers to a different WHPU-1000 unit, while the model table names WHPU-1500. That cross-reference cannot establish a WHPU-1500 charging specification.<\/p>\n<figure id=\"fig-original\" class=\"product-original\"><a href=\"https:\/\/www.wehopower.com\/de\/product\/whpu-1500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-9.jpg\" alt=\"Inverter-Charger AC Input Budget: Specify the Charging Source  title=\" loading=\"lazy\" inverter-charger ac input budget: specify the charging source title=\"\"><\/a><figcaption>Official WHPU-1500 family product photograph. The pictured markings are retained; the image does not identify every available input or AC output option.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-9.jpg\">View original image<\/a><\/figure>\n<p>Request the offered revision\u2019s AC input range, maximum RMS current, real power, power factor, startup demand and environmental conditions during charging. The generic\u201cInput current 10 A\u201d table label does not define these quantities by itself.<\/p>\n<p>Do not apply a maximum inverter-efficiency entry to the charger path. Efficiency depends on conversion path and operating point; use charger data or a controlled measurement for the state being budgeted.<\/p>\n<\/section>\n<section id=\"input-calculation\">\n<h2><span class=\"ez-toc-section\" id=\"Show_how_charging_power_becomes_AC_current\"><\/span>Show how charging power becomes AC current<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For an initial estimate,<strong>P<sub>Gleichstrom<\/sub>=V<sub>charge<\/sub>\u00d7I<sub>charge<\/sub><\/strong>,<strong>P<sub>AC<\/sub>=P<sub>Gleichstrom<\/sub>\/\u03b7<\/strong>, Und<strong>I<sub>AC, rms<\/sub>=P<sub>AC<\/sub>\/(V<sub>AC, rms<\/sub>\u00d7PF)<\/strong>. Include any additional losses or loads that the chosen boundary requires.<\/p>\n<p>Hypothetical charger example:28 V at 15 A is 420 W DC. At assumed 85% charger efficiency, input real power is 494 W. At 230 V and assumed true PF 0.75, AC RMS current is approximately 2.86 A. These assumed values describe no particular WHPU variant.<\/p>\n<figure id=\"fig-diagram\" class=\"diagram\"><img decoding=\"async\" class=\"technical-desktop\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-16.svg\" alt=\"Inverter-Charger AC Input Budget: Specify the Charging Source  title=\" loading=\"lazy\" inverter-charger ac input budget: specify the charging source title=\"\"><img decoding=\"async\" class=\"technical-mobile\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-mobile-16.svg\" alt=\"Inverter-Charger AC Input Budget: Specify the Charging Source  title=\" loading=\"lazy\" inverter-charger ac input budget: specify the charging source title=\"\"><figcaption>Hypothetical charging-path estimate; these are not WHPU-1500 charge or input ratings.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-16.svg\">Open full-size technical illustration<\/a><\/figure>\n<p>Without the PF term, the same arithmetic would give about 2.15 A and understate the assumed RMS current. Use true power factor, P divided by the product of RMS voltage and RMS current, so waveform distortion is included rather than substituting only a displacement-angle value. This definition does not identify the charger\u2019s internal input topology. Obtain actual data rather than treating either estimate as a protective-device selection.<\/p>\n<\/section>\n<section id=\"cover-operating-envelope\">\n<h2><span class=\"ez-toc-section\" id=\"Budget_the_charging_envelope_and_the_other_source_loads\"><\/span>Budget the charging envelope and the other source loads<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Charge voltage and current change through an approved cycle. Identify the condition that produces the relevant maximum input demand, along with input voltage and temperature. A low-current observation near charge completion cannot establish the source requirement at a different battery state.<\/p>\n<p>Sum real power for the real-power budget, but retain RMS current and waveform information for circuit and source review. Separate startup demand from continuous current. A generator or upstream inverter may impose its own limits on nonlinear input current and transitions.<\/p>\n<p>Do not select a breaker or cord solely from the illustrative 2.86 A. Wiring, connector limits, startup, protection coordination and applicable installation requirements still determine the actual AC circuit design.<\/p>\n<\/section>\n<section id=\"verify-source\">\n<h2><span class=\"ez-toc-section\" id=\"Verify_the_intended_source_and_charging_state_together\"><\/span>Verify the intended source and charging state together<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Use a suitable AC power analyzer or approved measurement method to record source voltage\/frequency, input real power, RMS current, true PF and the charging state. Time-align important source changes with charger and battery behavior.<\/p>\n<p>Record whether other loads are present, and keep the source operating mode with the result. A charger that behaves acceptably on one supply has not automatically been qualified on a smaller generator or an upstream inverter.<\/p>\n<p>Release the source budget only after the offered unit\u2019s defined input demand and the complete assembly\u2019s conditions agree. Revisit the budget when charging limits, battery configuration, other AC loads or source equipment change.<\/p>\n<\/section>\n<section class=\"cta\">\n<h2><span class=\"ez-toc-section\" id=\"Request_the_charging-input_envelope\"><\/span>Request the charging-input envelope<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Send WEHO the AC source specifications, battery charge requirements, exact DC variant and permitted state diagram. Request WHPU-1500 charger-path input data and evaluate it against the source budget.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/de\/contact\/\">Discuss the AC charging-source requirement<\/a><\/p>\n<\/section>\n<section id=\"worksheet\" class=\"sheet\">\n<h2><span class=\"ez-toc-section\" id=\"AC_charging-source_budget\"><\/span>AC charging-source budget<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"sheet-row\"><label>Exact unit\/revision and DC version<input aria-label=\"Exact unit\/revision and DC version\"><\/label><label>Source identity and capability<input aria-label=\"Source identity and capability\"><\/label><label>Permitted operating states<input aria-label=\"Permitted operating states\"><\/label><label>Input measurement method<input aria-label=\"Input measurement method\"><\/label><label>Reviewer \/ date<input aria-label=\"Reviewer \/ date\"><\/label><\/div>\n<div class=\"table-scroll\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Charging state<\/th>\n<th scope=\"col\">DC V\/A<\/th>\n<th scope=\"col\">AC W \/ RMS A \/ PF<\/th>\n<th scope=\"col\">Other source loads<\/th>\n<th scope=\"col\">Source condition \/ decision<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Blank project worksheet. Enter verified project data; example calculations above are not measurements.<\/p>\n<\/section>\n<section class=\"source-list\">\n<h2><span class=\"ez-toc-section\" id=\"Sources_and_further_reading\"><\/span>Sources and further reading<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><a href=\"https:\/\/www.wehopower.com\/de\/product\/whpu-1500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-1500 family product information<\/a><\/li>\n<\/ol>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Budget AC charging input from defined DC charging power, efficiency, true PF and source conditions. Do not use WHPU1500 inverter watts as its charger-input demand.<\/p>","protected":false},"author":2,"featured_media":20844,"parent":0,"menu_order":11,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20866","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/news\/20866","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/comments?post=20866"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/news\/20866\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/media\/20844"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/media?parent=20866"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/de\/wp-json\/wp\/v2\/news_category?post=20866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}