{"id":20865,"date":"2026-11-05T10:06:54","date_gmt":"2026-11-05T02:06:54","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/inverter-off-state-storage-current-record\/"},"modified":"2026-11-05T10:06:54","modified_gmt":"2026-11-05T02:06:54","slug":"inverter-off-state-storage-current-record","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/pl\/news\/inverter-off-state-storage-current-record\/","title":{"rendered":"Inverter Off-State Drain: Measure Battery Use During Storage"},"content":{"rendered":"<figure class=\"hero\"><a href=\"https:\/\/www.wehopower.com\/pl\/product\/whpu-600-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/hero-15.webp\" alt=\"Inverter Off-State Drain: Measure Battery Use During Storage  title=\" fetchpriority=\"high\" inverter off-state drain: measure battery use during storage title=\"\"><\/a><figcaption>AI-assisted unloaded service\/storage preparation using original WHPU-600 artwork. Both front outputs are empty and the AC cord is parked; this is not an off-state drain measurement or proof of isolation.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-8.jpg\">View original product image<\/a><\/figure>\n<p><strong>Define the actual storage state and measure its battery draw; do not assume a front-panel off position physically isolates the battery.<\/strong> A no-load operating-current figure describes a different condition unless the manufacturer says otherwise.<\/p>\n<p>This article helps a fleet or OEM team evaluate the <a href=\"https:\/\/www.wehopower.com\/pl\/product\/whpu-600-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-600 inverter\/charger family<\/a> for equipment left unused between work periods. The deliverable is a state-specific current and storage-energy record, rather than an unsupported runtime or battery-life claim.<\/p>\n<nav class=\"toc\" aria-label=\"On this page\">\n<ol>\n<li><a href=\"#define-storage-state\">Describe storage as a complete system state<\/a><\/li>\n<li><a href=\"#no-load-not-off\">Do not copy the no-load figure into a storage budget<\/a><\/li>\n<li><a href=\"#measure-small-current\">Measure low current without changing the state<\/a><\/li>\n<li><a href=\"#storage-arithmetic\">Turn the observed state into a clearly limited estimate<\/a><\/li>\n<li><a href=\"#release-storage\">Write an operating rule from the verified record<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"define-storage-state\">\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\">Spis tre\u015bci<\/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=\"Prze\u0142\u0105cznik Spisu Tre\u015bci\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">D\u017awignia kolankowa<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Describe_storage_as_a_complete_system_state\" >Describe storage as a complete system state<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Do_not_copy_the_no-load_figure_into_a_storage_budget\" >Do not copy the no-load figure into a storage budget<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Measure_low_current_without_changing_the_state\" >Measure low current without changing the state<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Turn_the_observed_state_into_a_clearly_limited_estimate\" >Turn the observed state into a clearly limited estimate<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Write_an_operating_rule_from_the_verified_record\" >Write an operating rule from the verified record<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Confirm_the_proposed_storage_state\" >Confirm the proposed storage state<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Storage-state_battery-current_record\" >Storage-state battery-current record<\/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\/pl\/news\/inverter-off-state-storage-current-record\/#Sources_and_further_reading\" >Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Describe_storage_as_a_complete_system_state\"><\/span>Describe storage as a complete system state<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Record the panel-switch position, AC input availability, permitted charger state, connected output loads and DC accessories. Include remote controls, monitoring devices and a battery-management system that may remain energized independently of the inverter.<\/p>\n<p>Use the exact unit instructions to identify which states exist. Terms such as \u201coff,\u201d \u201cstandby\u201d and\u201csearch mode\u201d are not interchangeable across products. Do not invent a low-power mode because another manufacturer offers one.<\/p>\n<p>Where service isolation is required, specify the approved disconnection arrangement separately. A low reading is an energy observation, not proof of isolation or permission to work on the equipment.<\/p>\n<\/section>\n<section id=\"no-load-not-off\">\n<h2><span class=\"ez-toc-section\" id=\"Do_not_copy_the_no-load_figure_into_a_storage_budget\"><\/span>Do not copy the no-load figure into a storage budget<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The WHPU-600 family table lists\u201cunload current less than\u201d 0.6 A for 12 V columns and 0.4 A for 24 V columns. That entry does not say the same current applies with the front switch off, during charging or after a separately installed disconnect is opened.<\/p>\n<figure id=\"fig-original\" class=\"product-original\"><a href=\"https:\/\/www.wehopower.com\/pl\/product\/whpu-600-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-8.jpg\" alt=\"Inverter Off-State Drain: Measure Battery Use During Storage  title=\" loading=\"lazy\" inverter off-state drain: measure battery use during storage title=\"\"><\/a><figcaption>Official WHPU-600 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-8.jpg\">View original image<\/a><\/figure>\n<p>Ask for the defined conditions behind the entry and the behavior of the supplied unit in the proposed storage state. The original photograph\u2019s 12 V marking is retained; a 24 V table option does not relabel that pictured sample.<\/p>\n<p>Keep published limits, assumptions and measured values in separate cells. A later measurement can improve the storage estimate only for the conditions it actually covers.<\/p>\n<\/section>\n<section id=\"measure-small-current\">\n<h2><span class=\"ez-toc-section\" id=\"Measure_low_current_without_changing_the_state\"><\/span>Measure low current without changing the state<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Select a DC current measurement method with adequate resolution and offset stability for the expected draw. A large-range clamp can be useful for operating current yet inadequate for a small storage current. A series sensor can introduce a burden or require a changed connection; the qualified test team must assess that method before use.<\/p>\n<p>Record how long the equipment has been in the chosen state. Wakeups, periodic checks or a fan event can make a short snapshot unrepresentative. Where current varies, retain a time record long enough for the actual behavior being assessed.<\/p>\n<p>Observe net battery draw if the storage question concerns the whole assembly. Measuring only the inverter branch omits other devices that can continue to discharge the battery.<\/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-15.svg\" alt=\"Inverter Off-State Drain: Measure Battery Use During Storage  title=\" loading=\"lazy\" inverter off-state drain: measure battery use during storage title=\"\"><img decoding=\"async\" class=\"technical-mobile\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-mobile-15.svg\" alt=\"Inverter Off-State Drain: Measure Battery Use During Storage  title=\" loading=\"lazy\" inverter off-state drain: measure battery use during storage title=\"\"><figcaption>Storage-energy evaluation sequence; it does not assert that a WHPU control physically isolates the battery.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-15.svg\">Open full-size technical illustration<\/a><\/figure>\n<\/section>\n<section id=\"storage-arithmetic\">\n<h2><span class=\"ez-toc-section\" id=\"Turn_the_observed_state_into_a_clearly_limited_estimate\"><\/span>Turn the observed state into a clearly limited estimate<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a constant-current approximation,<strong>charge removed in Ah=current in A\u00d7hours<\/strong>. An assumed 0.03 A net draw over 14 days removes 0.03\u00d7336=<strong>10.08 Ah<\/strong>. At an assumed constant 12.8 V, the corresponding energy estimate is 129 Wh.<\/p>\n<p>If the assumed current were 0.3 A instead, the same interval would remove 100.8 Ah. Neither value is measured WHPU-600 consumption. The example shows why a decimal place matters and why \u201cnearly off\u201d is not a usable storage specification.<\/p>\n<p>Actual available storage time also depends on battery condition, temperature, self-discharge, permitted state-of-charge reserve and other loads. Do not divide nominal battery Ah by one observed current and present the result as a guaranteed unattended period.<\/p>\n<\/section>\n<section id=\"release-storage\">\n<h2><span class=\"ez-toc-section\" id=\"Write_an_operating_rule_from_the_verified_record\"><\/span>Write an operating rule from the verified record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The battery manufacturer\u2019s storage instructions set the permitted approach. Use measured assembly draw to decide whether the planned interval needs a documented recharge\/check routine or an approved isolation state. Confirm any consequences for monitoring and battery management before disconnecting them.<\/p>\n<p><a href=\"https:\/\/www.victronenergy.com\/media\/pg\/BMV-700\/en\/configuration.html\" target=\"_blank\" rel=\"noopener\">Victron\u2019s battery-monitor guidance<\/a> notes that residual system consumption can matter during unattended periods. That is a system-energy issue, not evidence for a particular WHPU off-state current.<\/p>\n<p>Retain the actual state, current trace, battery requirement and allowed interval together. Recheck after adding telemetry, changing firmware or altering the storage procedure. This makes the instruction useful to operations staff without pretending the front switch is a battery disconnect.<\/p>\n<\/section>\n<section class=\"cta\">\n<h2><span class=\"ez-toc-section\" id=\"Confirm_the_proposed_storage_state\"><\/span>Confirm the proposed storage state<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Provide WEHO with the exact WHPU-600 configuration, battery instructions, connected accessories and intended unused interval. Request the unit\u2019s state definitions and review the measured storage-current record.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/pl\/contact\/\">Discuss storage consumption and controls<\/a><\/p>\n<\/section>\n<section id=\"worksheet\" class=\"sheet\">\n<h2><span class=\"ez-toc-section\" id=\"Storage-state_battery-current_record\"><\/span>Storage-state battery-current record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"sheet-row\"><label>Unit and battery revision<input aria-label=\"Unit and battery revision\"><\/label><label>Battery storage requirements<input aria-label=\"Battery storage requirements\"><\/label><label>Switch\/AC\/accessory configuration<input aria-label=\"Switch\/AC\/accessory configuration\"><\/label><label>Measurement resolution \/ duration<input aria-label=\"Measurement resolution \/ duration\"><\/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\">Documented state<\/th>\n<th scope=\"col\">Elapsed time \/ current trace<\/th>\n<th scope=\"col\">Net battery A<\/th>\n<th scope=\"col\">Estimated interval \/ Ah<\/th>\n<th scope=\"col\">Storage action \/ limits<\/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\/pl\/product\/whpu-600-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-600 family product information<\/a><\/li>\n<li><a href=\"https:\/\/www.victronenergy.com\/media\/pg\/BMV-700\/en\/configuration.html\" target=\"_blank\" rel=\"noopener\">Victron BMV-700 configuration guidance<\/a><\/li>\n<\/ol>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Measure battery draw in documented off, standby and storage states. Build a storage-current record for WHPU600 without confusing no-load operation with isolation.<\/p>","protected":false},"author":2,"featured_media":20840,"parent":0,"menu_order":30,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20865","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\/pl\/wp-json\/wp\/v2\/news\/20865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/comments?post=20865"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news\/20865\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/media\/20840"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/media?parent=20865"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news_category?post=20865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}