{"id":96553,"date":"2026-01-21T08:53:31","date_gmt":"2026-01-20T23:23:31","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=96553"},"modified":"2026-01-21T08:56:51","modified_gmt":"2026-01-20T23:26:51","slug":"solar-mistake-new-home-build","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/solar-mistake-new-home-build\/","title":{"rendered":"Don&#8217;t Make This Solar Mistake In A New Home Build"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-96560\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/new-build-solar-wiring.jpg\" alt=\"\" width=\"1200\" height=\"627\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/new-build-solar-wiring.jpg 1200w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/new-build-solar-wiring-300x157.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/new-build-solar-wiring-1024x535.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/new-build-solar-wiring-768x401.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>If you\u2019re building a new home and thinking about solar (or a battery) down the track, the best advice I can give you is this: get your solar installer involved before the plasterboard goes up.<\/p>\n<p><!--more-->I know it\u2019s tempting to leave solar until after the build\u2019s done, but by then, you\u2019ve missed the best opportunity to get the wiring right and hidden neatly inside the walls.<\/p>\n<p>If your builder wants to \u201chelp out\u201d by getting their own sparkie to run the solar cables during framing, that can work \u2014 but only if it\u2019s done properly.<\/p>\n<p>And that means:<\/p>\n<ul>\n<li>Your solar installer needs to review or approve the cable run before it\u2019s all covered up.<\/li>\n<li>There should be photos of everything \u2014 the conduit, the cable markings, the earthing \u2014 and maybe even some test results to prove it\u2019s compliant.<\/li>\n<\/ul>\n<p>Without that, you risk ending up in a situation where your installer either can\u2019t sign off on the job, or has to run fresh conduit down your beautiful new facade. Trust me \u2014 I\u2019ve seen it happen more times than I\u2019d like. A bit of planning early on can save you a headache later.<\/p>\n<h2>The Words No Solar Installer Should Want To Hear<\/h2>\n<p>There often comes a moment for solar installers visiting a new home when the builder says: \u201cDon\u2019t worry, our electrician\u2019s already run the solar cables for you\u201d. Yeah\u2026 that\u2019s the moment to start worrying.<\/p>\n<p>On the surface, it sounds like a time-saver. But in reality, it could be the beginning of a very expensive, very frustrating game of \u201cGuess What\u2019s Behind the Plaster.\u201d<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-97297\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2026\/01\/wiring-new-build-e1768799613907.jpg\" alt=\"Wiring in a new build\" width=\"1075\" height=\"850\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2026\/01\/wiring-new-build-e1768799613907.jpg 1075w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2026\/01\/wiring-new-build-e1768799613907-300x237.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2026\/01\/wiring-new-build-e1768799613907-1024x810.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2026\/01\/wiring-new-build-e1768799613907-768x607.jpg 768w\" sizes=\"(max-width: 1075px) 100vw, 1075px\" \/><\/p>\n<h2>The Red Flag: When Your Installer Didn\u2019t Do the Rough-In<\/h2>\n<p>If your solar installer didn\u2019t run the cables, but is expected to fit off and certify the system, then they\u2019re taking on a lot more than just the final connections. They\u2019re taking on liability for work they didn\u2019t see, can\u2019t verify, and didn\u2019t control.<\/p>\n<p>In an ideal world, the same crew that does the rough-in would also finish the install. That way, they know exactly what\u2019s in the walls, what conduit was used, and what kind of cable was run. But we don\u2019t always live in an ideal world \u2014 we live in a world of builder deadlines and \u201cshe\u2019ll be right\u201d attitudes.<\/p>\n<h2>There\u2019s No Such Thing As A Compliance Shortcut<\/h2>\n<p>This isn\u2019t just a hypothetical scenario \u2014 it\u2019s something that\u2019s actually been reported to me as a solar inspector.<\/p>\n<p>Installers are telling us they\u2019re losing jobs to competitors who are happy to accept a builder\u2019s pre-wiring and a certificate from the builder\u2019s sparkie. In Victoria, that might be a non-prescribed Certificate of Electrical Safety (COES). In NSW, it\u2019s a CCEW (Compliance Certificate of Electrical Work). Every state has its version.<\/p>\n<p>But here\u2019s the rub: these certificates don\u2019t verify that the work meets solar compliance standards. A non-prescribed COES does not cover prescribed electrical work \u2014 and solar installs absolutely fall into that category.<\/p>\n<p>So let\u2019s call this practice what it is: risky, and non-compliant. Just because someone has handed you a certificate doesn\u2019t mean the work behind the walls is up to scratch \u2014 or even legal. And if you&#8217;re an installer who\u2019s taking the hit because you\u2019re doing things by the book, you\u2019re not alone \u2014 and you\u2019re not wrong. This needs to be called out, and it needs to stop.<\/p>\n<h2>What\u2019s Really Hiding Behind the Walls?<\/h2>\n<p>Let\u2019s say the builder\u2019s sparkie has roughed in the DC cables. Your installer didn\u2019t see it happen. The plaster\u2019s up. Maybe they got a blurry photo from three weeks ago, taken on a first-generation Nokia camera phone that looks like it\u2019s been through the wash.<\/p>\n<div id=\"attachment_96559\" style=\"width: 970px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-96559\" class=\"wp-image-96559 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/TC_09599-e1765430693753.jpg\" alt=\"Wires emerging from a freshly plastered wall\" width=\"960\" height=\"810\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/TC_09599-e1765430693753.jpg 960w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/TC_09599-e1765430693753-300x253.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/12\/TC_09599-e1765430693753-768x648.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><p id=\"caption-attachment-96559\" class=\"wp-caption-text\">Looks neat now, but the real question is \u2014 what\u2019s going on inside that wall? Without photos taken during the rough-in, there\u2019s no way to confirm if the correct conduit was used or if the DC cabling meets the standard. And yet, the installer\u2019s still expected to take full responsibility. This is exactly why your solar installer needs to be involved early \u2014 before the walls are sealed up and the guesswork begins.<\/p><\/div>\n<h2>What could go wrong?<\/h2>\n<ul>\n<li>Wrong cable type (seen PV1-F, and even AC-rated stuff more times than I care to admit)<\/li>\n<li>No conduit \u2014 or the wrong conduit (not HD, cracked, or already crushed)<\/li>\n<li>Cables not fixed securely<\/li>\n<li>No earthing conductor<\/li>\n<li>Installed right up against plasterboard with zero mechanical protection<\/li>\n<\/ul>\n<p>Now, about that mechanical protection\u2026<\/p>\n<p>If a DC cable is installed within 50mm of a building surface, it needs to be protected so that it can move freely \u2014 or more importantly, so it doesn\u2019t get nailed or screwed into later. That\u2019s not just a solar thing. That requirement actually comes straight out of AS\/NZS 3000. Yep, the good old Wiring Rules.<\/p>\n<p>Now, specialist installers know that AS\/NZS 5033 is the bible for solar installs \u2014 and they need to know it back to front. But a general electrician, especially one who doesn\u2019t do solar, may not realise that the mechanical protection rules from AS3000 still apply to DC cabling inside internal cavity walls.<\/p>\n<p>And HD conduit might not cut it. In some cases, you\u2019ll need steel conduit or something that meets a WSX3 mechanical protection rating. Most of the time, the builder\u2019s electrician won\u2019t even know what that means \u2014 and honestly, I don\u2019t blame them. It\u2019s not their world.<\/p>\n<h2>What I\u2019d Expect to See (As an Inspector)<\/h2>\n<p>If installers absolutely have to take on a job where the pre-wire was done by someone else, here\u2019s what to ask for before signing off:<\/p>\n<p><strong>Clear, close-up photos of:<\/strong><\/p>\n<ul>\n<li>Conduit type (confirm it\u2019s HD or better)<\/li>\n<li>Cable markings showing it\u2019s DC-compliant (meets IEC standards)<\/li>\n<li>Earthing conductors (correct gauge and securely installed)<\/li>\n<li>Cables secured properly \u2014 no loose spaghetti<\/li>\n<li>Slack at both ends so you can verify what\u2019s been run<\/li>\n<\/ul>\n<p><strong>Testing photos showing:<\/strong><\/p>\n<ul>\n<li>Continuity of DC conductors<\/li>\n<li>Continuity of earths<\/li>\n<li>Insulation resistance test results<\/li>\n<li>No photo, no proof, no install.<\/li>\n<\/ul>\n<h2>Who Cops the Risk?<\/h2>\n<p>Here&#8217;s the fun part. If the install gets knocked back by the inspector \u2014 or worse, fails down the track \u2014 your installer is on the hook. Not the builder. Not their sparkie.<\/p>\n<p>Solar installers wear the risk. And unfortunately, builders often push that risk downhill \u2014 straight onto the subcontractors. Why? Because they can. And because their margins come first.<\/p>\n<p>So when installers are being asked to sign off on someone else\u2019s hidden cabling work, remember: it\u2019s their licence on the line.<\/p>\n<h2>What Installers Should Be Saying to Builders<\/h2>\n<p>I get it. It\u2019s awkward. Builders don\u2019t want to hear \u201cno.\u201d They want the job done yesterday, and they want you to \u201cjust work with what\u2019s there.\u201d But this is where you need to plant your feet and calmly say:<\/p>\n<blockquote><p>\u201cMate, unless I can verify what\u2019s in that wall, I can\u2019t sign it off. I\u2019m not risking my licence for something I didn\u2019t see.\u201d<\/p><\/blockquote>\n<p>They might not like it. But they\u2019ll respect it \u2014 eventually. And if they don\u2019t? Well, maybe they weren\u2019t the kind of builder you wanted to work with anyway.<\/p>\n<h2>Final Word: Protect Yourself<\/h2>\n<p>Pre-wiring during a new build can work \u2014 if it\u2019s done right, documented properly, and verified before the plasterboard goes up. But if your installer didn\u2019t do the work, and can\u2019t prove how it was done, they\u2019re being asked to sign off on a lucky dip.<\/p>\n<p>And I don\u2019t know about you, but I\u2019m not in the business of signing off mystery cables inside someone\u2019s $900,000 home.<\/p>\n<p>Speak up. Ask for proof. And if it doesn\u2019t stack up, walk away. Your home is worth more than a builder\u2019s shortcut.<\/p>\n<p><em>For more on buying solar, read SolarQuotes <a href=\"https:\/\/www.solarquotes.com.au\/panels\/\">detailed guide on what you should know<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019re building a new home and thinking about solar (or a battery) down the track, the best advice I can give you is this: get your solar installer involved before the plasterboard goes up.<\/p>\n","protected":false},"author":34,"featured_media":96560,"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":[57],"tags":[],"class_list":["post-96553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-installation","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>Don&#039;t Make This Solar Mistake In A New Home Build<\/title>\n<meta name=\"description\" content=\"If you\u2019re building a home and thinking about solar (or a battery) down 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