{"id":20935,"date":"2026-11-06T10:12:24","date_gmt":"2026-11-06T02:12:24","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/ups-cold-start-battery-only-startup-check\/"},"modified":"2026-11-06T10:12:24","modified_gmt":"2026-11-06T02:12:24","slug":"ups-cold-start-battery-only-startup-check","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/ko\/news\/ups-cold-start-battery-only-startup-check\/","title":{"rendered":"UPS Cold Start: Can the System Start from Battery Without Mains?"},"content":{"rendered":"<div class=\"weho-geo-content\">\n<p class=\"lead\"><strong>Cold start means starting an eligible UPS from its battery when the normal AC input is unavailable.<\/strong> It is a separate capability from switching an already-running load to battery. Before specifying it for a critical system, confirm the exact equipment and battery configuration, the available starting capacity, and the behavior on restoration of the normal source.<\/p>\n<figure><a href=\"https:\/\/www.wehopower.com\/ko\/product\/ups-155w-ac-to-dc-single-output-power-supply-with-battery-charger\/\" aria-label=\"View WEHO AD-155 family product details\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/product-scene-scene-2026-10-28-controls-ups-v1-d41b52e661e2.png\" width=\"1672\" height=\"941\" alt=\"UPS Cold Start: Can the System Start from Battery Without Mains?  title=\" ups cold start: can the system start from battery without title =\"\"><\/a><figcaption>WEHO AD-155 family in an access-control cabinet context; cold-start capability and the concealed connections are not demonstrated. Application illustration; not a customer installation photo. Scene created with AI assistance. <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/product-scene-scene-2026-10-28-controls-ups-v1-d41b52e661e2.png\">View full-size illustration<\/a>.<\/figcaption><\/figure>\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\">\ubaa9\ucc28<\/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=\"\ubaa9\ucc28 \ud1a0\uae00\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\ube44\ub140\uc7a5<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Why_a_battery_transfer_test_is_not_a_cold-start_test\" >Why a battery transfer test is not a cold-start test<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Separate_the_three_questions\" >Separate the three questions<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Specify_the_startup_event\" >Specify the startup event<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Make_an_evidence_record_not_a_shortcut\" >Make an evidence record, not a shortcut<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#What_happens_when_the_normal_source_returns\" >What happens when the normal source returns?<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Where_a_WEHO_product_fits\" >Where a WEHO product fits<\/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\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Questions_buyers_ask\" >Questions buyers ask<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Does_a_successful_battery_self-test_prove_cold_start\" >Does a successful battery self-test prove cold start?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Does_cold_start_prove_the_required_backup_time\" >Does cold start prove the required backup time?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/ko\/news\/ups-cold-start-battery-only-startup-check\/#Can_I_use_a_procedure_for_a_different_UPS\" >Can I use a procedure for a different UPS?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_a_battery_transfer_test_is_not_a_cold-start_test\"><\/span>Why a battery transfer test is not a cold-start test<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A transfer test begins with a system already running from its normal source and observes its behavior after that source changes. A cold-start requirement begins with the UPS and load stopped, with the normal input absent. Depending on the design, the equipment may need enough battery energy to energize its own controls, create its output and start the connected load. A successful transfer therefore does not, by itself, establish that the same system can start from a battery.<\/p>\n<p>Schneider Electric describes a <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FAQ000265291\/\" target=\"_blank\" rel=\"noopener\">cold-start procedure for its Easy-UPS equipment<\/a> and a separate <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA157417\/\" target=\"_blank\" rel=\"noopener\">procedure for specified Symmetra models<\/a>. The steps, controls and expected indications belong to those models; they are not instructions or capability evidence for a WEHO product. Ask the actual manufacturer for the applicable documentation and revision.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Separate_the_three_questions\"><\/span>Separate the three questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"table-scroll\">\n<table>\n<thead>\n<tr>\n<th>Question<\/th>\n<th>What the evidence should address<\/th>\n<th>\uadf8\uac83\uc774 \ub9cc\ub4e4\uc5b4\uc9c0\uc9c0 \uc54a\ub294 \uac83\uc740<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Can it transfer?<\/td>\n<td>The existing load and supply state during the documented source change.<\/td>\n<td>Start from battery with the system initially off.<\/td>\n<\/tr>\n<tr>\n<td>Can it cold start?<\/td>\n<td>Battery-only startup of the exact equipment and specified load, if supported.<\/td>\n<td>The complete required runtime or every later restart.<\/td>\n<\/tr>\n<tr>\n<td>Can it run long enough?<\/td>\n<td>Usable backup at the required load, state of charge, environment and acceptance conditions.<\/td>\n<td>That a device can start when no normal input is present.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>The architecture matters. An AC-output UPS supplying an AC load is not interchangeable with a battery-backed DC supply feeding a control circuit. Define the output, the energy source, the connected load and the controlled operating state before comparing documents.<\/p>\n<figure><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-16.svg\"><picture><source media=\"(max-width:560px)\" srcset=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-mobile-16.svg\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-16.svg\" width=\"1200\" height=\"610\" alt=\"UPS Cold Start: Can the System Start from Battery Without Mains?  title=\" ups cold start: can the system start from battery without title=\"\"><\/picture><\/a><figcaption>Transfer, battery-only startup and runtime are distinct questions. The diagram does not show wiring or assert a feature of the pictured AD-155. <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-16.svg\">View full-size diagram<\/a>.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Specify_the_startup_event\"><\/span>Specify the startup event<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For each proposed configuration, record the exact equipment model and revision, battery chemistry and approved configuration, battery condition and state of charge, output voltage, environmental conditions and the source state. Obtain the manufacturer\u2019s permission for battery-only startup, any required minimum battery condition, and the indication that the output is ready.<\/p>\n<p>List the load at startup as well as its steady operating state. A motor, power supply or capacitive input can demand a different current during startup. Do not use a steady wattage value as proof of the startup envelope. Ask whether the output\u2019s documented starting capability and load behavior are compatible, and assess the complete installation under the applicable equipment instructions.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Make_an_evidence_record_not_a_shortcut\"><\/span>Make an evidence record, not a shortcut<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>Document the initial state.<\/strong> Identify which input is unavailable, whether the backup equipment and load are already off, and the intended purpose of startup.<\/li>\n<li><strong>Confirm the equipment capability.<\/strong> Obtain the exact model\u2019s instructions for battery-only starting and any restrictions. An unspecified capability remains unknown.<\/li>\n<li><strong>Account for battery and load conditions.<\/strong> Record the accepted battery configuration and state, the startup load profile and the minimum operating conditions defined for the project.<\/li>\n<li><strong>Plan the change in service.<\/strong> Have the responsible team assess critical-load continuity and the effect of consuming backup energy before any controlled verification.<\/li>\n<li><strong>Record the outcome.<\/strong> Capture the equipment revision, initial conditions, load configuration, observed behavior and recovery conditions. Compare the result with the project acceptance criteria.<\/li>\n<\/ol>\n<p>Do not disconnect batteries, bypass protection or reproduce another manufacturer\u2019s button sequence based on a generic article. A test can interrupt a load or reduce the energy available for an actual outage. The responsible personnel should use the instructions for the installed product and a site-approved procedure.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_happens_when_the_normal_source_returns\"><\/span>What happens when the normal source returns?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The project also needs an agreed return-to-service behavior. Some systems may return to normal input, recharge, or require a user action, but the actual sequence and allowed load depend on the equipment. Ask whether a battery-only started load continues operating through restoration, how charging is indicated, and what records must be kept. Do not assume automatic transfer or charging from the AI-assisted application illustration.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Where_a_WEHO_product_fits\"><\/span>Where a WEHO product fits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\uadf8\ub9cc\ud07c <a href=\"https:\/\/www.wehopower.com\/ko\/product\/ups-155w-ac-to-dc-single-output-power-supply-with-battery-charger\/\">WEHO AD-155 family page<\/a> describes a power-supply family with battery-charger functionality. The lead image provides an AI-assisted application context, not evidence that a particular suffix supports battery-only startup, the AC-output UPS behavior discussed above, a specific battery chemistry or a proven transfer result. Obtain current documents for the exact unit and intended arrangement.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Questions_buyers_ask\"><\/span>Questions buyers ask<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Does_a_successful_battery_self-test_prove_cold_start\"><\/span>Does a successful battery self-test prove cold start?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. A self-test has its own defined starting state, load and duration. Verify whether it actually covers starting the complete system from its battery with normal input unavailable.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_cold_start_prove_the_required_backup_time\"><\/span>Does cold start prove the required backup time?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Starting is one event. Runtime depends on the approved battery, its condition, load and project acceptance conditions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_use_a_procedure_for_a_different_UPS\"><\/span>Can I use a procedure for a different UPS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Controls, battery arrangements and operating modes differ. Use the exact model and revision\u2019s current instructions and the site\u2019s approved plan.<\/p>\n<p class=\"article-cta\">Send WEHO the exact supply model and suffix, required output, battery configuration, startup and normal load profile, and the intended behavior when the normal source returns. Ask for model-specific capability and installation documentation. <a href=\"https:\/\/www.wehopower.com\/ko\/contact\/\">WEHO\uc5d0 \ubb38\uc758\ud558\uc138\uc694<\/a>.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Distinguish battery-only UPS startup, transfer and backup runtime; document the actual equipment, battery and load conditions.<\/p>","protected":false},"author":2,"featured_media":20915,"parent":0,"menu_order":6,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20935","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\/ko\/wp-json\/wp\/v2\/news\/20935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/comments?post=20935"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/news\/20935\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/media\/20915"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/media?parent=20935"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/ko\/wp-json\/wp\/v2\/news_category?post=20935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}