{"id":78442,"date":"2023-09-05T10:07:39","date_gmt":"2023-09-05T00:37:39","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=78442"},"modified":"2024-12-09T09:51:37","modified_gmt":"2024-12-09T00:21:37","slug":"hybrid-solar-bypass-switch","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/hybrid-solar-bypass-switch\/","title":{"rendered":"Backup Your Blackout Plans. Why Hybrid Solar Needs A Bypass Switch"},"content":{"rendered":"<div id=\"attachment_78486\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78486\" class=\"wp-image-78486 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header.jpg\" alt=\"Hybrid solar power system with bypass switch\" width=\"1200\" height=\"630\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header.jpg 1200w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header-300x158.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header-1024x538.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header-768x403.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><p id=\"caption-attachment-78486\" class=\"wp-caption-text\">The green parts are thanks to SolarQuotes. In normal operation, grid energy goes in the hybrid inverter through the red line, out along the brown line, and into the home&#8217;s essential circuits via the green line. If the inverter fails, it can simply be bypassed with the green switch.<\/p><\/div>\n<p>Home batteries used to be a niche market for tech enthusiasts and those needing emergency power. But as battery-backed hybrid solar systems proliferate, the solar industry is learning that even the best plans can go awry.<!--more--><\/p>\n<p>SolarQuotes now recommends to our installer network that if they sell a <a href=\"https:\/\/www.solarquotes.com.au\/battery-storage\/\">home battery<\/a> with backup functionality through a <a href=\"https:\/\/www.solarquotes.com.au\/battery-storage\/hybrid-inverter-comparison\/\">hybrid inverter<\/a>,<strong> it must have a bypass switch<\/strong>.<\/p>\n<p>Most hybrid solar power systems have limited capacity, so you invariably choose only the most important home circuits for backup. If the hybrid inverter fails, it can prevent grid electricity getting to those essential circuits. They&#8217;ll lose power. And you don&#8217;t want to be calling an electrician to come and rewire the switchboard at the drop of a hat.<\/p>\n<p><strong>If your essential circuits stop working, the lights go out and the fridge goes warm, you need a simple switch to restore ordinary grid power until the system can be diagnosed a repaired.<\/strong><\/p>\n<p>The grid is legislated to be 99.998% reliable, (you&#8217;re entitled to get upset if you lose power for more than 10.5 seconds per year?). Many Australians go years without electricity interruption, especially in newer suburbs where the infrastructure is buried, safe from storms and kamikaze car drivers.<\/p>\n<p>So for many customers the <strong><em>idea<\/em> <\/strong>of battery backup is much more important than the actual capability. It becomes a somewhat emotional decision to buy a security blanket economically justified as stored energy saving a few dollars every night. Things come unstuck if that costly insurance policy fails to kick in, or even worse, ends up costing even more money\u00a0 and causing further inconvenience or losses.<\/p>\n<div id=\"attachment_78485\" style=\"width: 852px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78485\" class=\"wp-image-78485 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/GE-bypass-switch-explained.jpg\" alt=\"GE hybrid with bypass switch\" width=\"842\" height=\"527\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/GE-bypass-switch-explained.jpg 842w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/GE-bypass-switch-explained-300x188.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/GE-bypass-switch-explained-768x481.jpg 768w\" sizes=\"(max-width: 842px) 100vw, 842px\" \/><p id=\"caption-attachment-78485\" class=\"wp-caption-text\">Glen Morris showing us the GE hybrid with factory-fitted bypass switch<\/p><\/div>\n<h2>What Are The Risks?<\/h2>\n<p>I&#8217;ve seen someone inadvertently unplug a deep freezer full of fish. A fortnight later, that wasn&#8217;t pretty.<\/p>\n<p>From a solar installer&#8217;s perspective, if there&#8217;s no bypass switch and something goes wrong in the inverter, the reputational damage to your business can be dreadful, as you&#8217;re the crowd who sold this lemon that doesn&#8217;t work. It creates emergency call-out work that wrecks operational calendars and overtime budgets.<\/p>\n<p>From a customer perspective, you&#8217;re entitled to expect a reliable product. If you have to call and demand out-of-hours service to restore power to your most important electrical essentials, it can ruin the relationship you have with the people who are there to provide warranty and technical support.<\/p>\n<h2>How Much Does A Bypass Switch Cost?<\/h2>\n<p>Included on install day, a bypass switch for a single-phase house might be an extra $100. Even on a three-phase install, the hardware and labour won&#8217;t exceed an electrician&#8217;s basic call-out fee. It&#8217;s one of those things that hopefully you&#8217;ll never need, but when you do, it pays for itself immediately.<\/p>\n<div id=\"attachment_78482\" style=\"width: 910px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78482\" class=\"wp-image-78482 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/63a-Clipsal-CO-switch.jpg\" alt=\"Changeover switch\" width=\"900\" height=\"518\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/63a-Clipsal-CO-switch.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/63a-Clipsal-CO-switch-300x173.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/63a-Clipsal-CO-switch-768x442.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-78482\" class=\"wp-caption-text\">In jurisdictions where off-peak tariffs are available, these changeover switches were often engraved &#8220;Day &#8211; Off &#8211; Night&#8221; because they were used to boost hot water tanks.<\/p><\/div>\n<h2>If You&#8217;re Struggling For Switchboard Space<\/h2>\n<p>If your switchboard is jam-packed, especially a 3-phase one, you may need a complete overhaul or an additional load centre added inside or next to your main switchboard &#8211; especially if you&#8217;re backing up more than a couple of circuits. As we&#8217;ve written previously, adding solar panels can be an excellent time to <a href=\"https:\/\/www.solarquotes.com.au\/blog\/solar-switchboard-upgrade-guide\/\">upgrade\u00a0your switchboard<\/a> and add <a href=\"https:\/\/www.solarquotes.com.au\/blog\/solar-hot-water-diverters-vs-batteries\/\">hot water control<\/a>, because it&#8217;s often a good deal more expensive to do <a href=\"https:\/\/support.solarquotes.com.au\/hc\/en-us\/articles\/6459857973775-Retrofit-consumption-monitoring-does-a-smart-meter-really-cost-750-\">after the fact<\/a>.<\/p>\n<div id=\"attachment_78481\" style=\"width: 910px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78481\" class=\"wp-image-78481 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/hager-3p-CO-switch.jpg\" alt=\"3 Phase changeover switch\" width=\"900\" height=\"497\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/hager-3p-CO-switch.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/hager-3p-CO-switch-300x166.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/hager-3p-CO-switch-768x424.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-78481\" class=\"wp-caption-text\">3 Phase changeover switches can be huge.<\/p><\/div>\n<h2>Labels, Labels, Labels.<\/h2>\n<p>Meeting the letter of the law means you should have a completely separate switchboard for loads running off an alternate supply. Pragmatically, this often doesn&#8217;t happen. Most places simply have a few labels in the meter box.<\/p>\n<p>In any case, you should have comprehensive and easy-to-read labels so any householder, plumber or ordinary domestic electrician (we call them roof possums) can understand that a home battery is present, and how to isolate and bypass it.<\/p>\n<p><strong>When workplace safety laws dictate anyone entering the roof space must first turn the power off, those working on the house must be aware the hot water may turn on automatically or that switching the grid supply off doesn&#8217;t mean the whole house is dead.<\/strong><\/p>\n<div id=\"attachment_78480\" style=\"width: 910px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78480\" class=\"wp-image-78480 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/santich-switchboard-composite.jpg\" alt=\"Battery hybrid switchboard labelling\" width=\"900\" height=\"525\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/santich-switchboard-composite.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/santich-switchboard-composite-300x175.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/santich-switchboard-composite-768x448.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-78480\" class=\"wp-caption-text\">There&#8217;s a lot going on here, which means labelling what you have to, so it makes sense. image credit Solar Depot<\/p><\/div>\n<h2>Of Course, There Are Exceptions<\/h2>\n<p>Fanbois unite! If you have a Fronius Gen24, or some other <em>parallel connected<\/em> hybrid inverter (like SolarEdge), then there&#8217;s no need for a bypass switch.<\/p>\n<p>Systems using a contactor or a &#8220;backup box&#8221; don&#8217;t have the essential circuits passing <em>through<\/em> the inverter, so if anything goes awry with the hybrid, the backup supply isn&#8217;t affected.<\/p>\n<div id=\"attachment_78479\" style=\"width: 733px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78479\" class=\"wp-image-78479 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Fronius-GEN24_hybrid_backup-power-diagram.jpg\" alt=\"Fronius full power backup\" width=\"723\" height=\"525\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Fronius-GEN24_hybrid_backup-power-diagram.jpg 723w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Fronius-GEN24_hybrid_backup-power-diagram-300x218.jpg 300w\" sizes=\"(max-width: 723px) 100vw, 723px\" \/><p id=\"caption-attachment-78479\" class=\"wp-caption-text\">If you erase the three items on the left of this image, your household loads are unaffected.<\/p><\/div>\n<h2>Fat Supply Cables Are Also Essential<\/h2>\n<p>Many experienced solar electricians have been caught out by the fact that hybrid inverters can impose really big loads on the grid connection. After a decade of connecting 5kW solar inverters on 6mm\u00b2 cable with a 32amp breaker, they haven&#8217;t realised that when you have backup loads running <em>and force charge a battery at the same time, <\/em>there could be a sustained 55amps or more drawn over the inverter circuit.<\/p>\n<div id=\"attachment_78478\" style=\"width: 848px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-78478\" class=\"wp-image-78478 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/sungrow-60amps.jpg\" alt=\"Sungrow hybrid inverter schematic\" width=\"838\" height=\"525\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/sungrow-60amps.jpg 838w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/sungrow-60amps-300x188.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/sungrow-60amps-768x481.jpg 768w\" sizes=\"(max-width: 838px) 100vw, 838px\" \/><p id=\"caption-attachment-78478\" class=\"wp-caption-text\">Sungrow saw the need to release this image, especially to remind installers about the demands of hybrid models.<\/p><\/div>\n<p>So, when your average house supply will deliver 63amp (~14kW) via a 16mm\u00b2 cable, you need exactly the same supply to the nominally rated 5kW hybrid inverter. In fact, if the hybrid goes in your garage 35 metres away, you&#8217;ll need an even bigger cable to <a href=\"https:\/\/www.solarquotes.com.au\/blog\/solar-voltage-rise-drop\/\">fight voltage drop.<\/a><\/p>\n<h2>Insist On Reliability<\/h2>\n<p>For <em>series-connected<\/em> hybrid inverters, the essential circuits are powered through the inverter. If it falls over or needs servicing, you need a bypass switch to keep everything online. For less than $100, both the solar installer and the customer will sleep easier. It&#8217;s a bargain.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Home batteries used to be a niche market for tech enthusiasts and those needing emergency power. But as battery-backed hybrid solar systems proliferate, the solar industry is learning that even the best plans can go awry.<\/p>\n","protected":false},"author":28,"featured_media":78486,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[551],"tags":[],"class_list":["post-78442","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-battery-storage","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Why Hybrid Solar Systems Need A Bypass Switch<\/title>\n<meta name=\"description\" content=\"If you install a solar battery system with backup and the inverter fails, you can lose grid power to your home. A bypass switch is the answer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.solarquotes.com.au\/blog\/hybrid-solar-bypass-switch\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Backup Your Blackout Plans. Why Hybrid Solar Needs A Bypass Switch\" \/>\n<meta property=\"og:description\" content=\"If you install a solar battery system with backup and the inverter fails, you can lose grid power to your home. A bypass switch is the answer.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.solarquotes.com.au\/blog\/hybrid-solar-bypass-switch\/\" \/>\n<meta property=\"og:site_name\" content=\"SolarQuotes Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SolarQuotes\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-05T00:37:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-12-09T00:21:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/08\/Sungrow-bypass-header.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Anthony Bennett\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@solar_quotes\" \/>\n<meta name=\"twitter:site\" content=\"@solar_quotes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/hybrid-solar-bypass-switch\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/hybrid-solar-bypass-switch\/\"},\"author\":{\"name\":\"Anthony Bennett\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#\/schema\/person\/eda68c24a3d87f41fa51e57c03d2ac2d\"},\"headline\":\"Backup Your Blackout Plans. 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He\u2019s a licensed electrician, builder, roofer and solar installer who for 14 years did jobs all over SA - residential, commercial, on-grid and off-grid. A true enthusiast with a skillset the typical solar installer might not have, his blogs are typically deep dives that draw on his decades of experience in the industry to educate and entertain. Read Anthony's full bio.\",\"url\":\"https:\/\/www.solarquotes.com.au\/blog\/author\/anthony\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Why Hybrid Solar Systems Need A Bypass Switch","description":"If you install a solar battery system with backup and the inverter fails, you can lose grid power to your home. 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