{"id":2054,"date":"2012-11-01T14:20:19","date_gmt":"2012-11-01T04:50:19","guid":{"rendered":"http:\/\/www.solarquotes.com.au\/blog\/?p=2054"},"modified":"2024-05-01T11:01:09","modified_gmt":"2024-05-01T01:31:09","slug":"how-do-you-know-if-your-roof-is-good-for-solar-power","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/","title":{"rendered":"How Do You Know If Your Roof Is Good For Solar Power?"},"content":{"rendered":"<p>Back to the absolute solar basics today on the SQ blog!<\/p>\n<p>In this video I describe the 3 things you need to understand about your roof before buying a solar power system.<\/p>\n<div class=\"youtube-wrapper\"><iframe title=\"How Do You Know If Your Roof Is Good For Solar Power?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/na5KAJiyAxE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>And here&#8217;s the transcript if my pink shirt gets too much for you:<!--more--><\/p>\n<p>Hi! I\u2019m Finn Peacock, I love solar power, but not everyone&#8217;s house is suitable for solar power and not everyone&#8217;s roof is suitable. So how do you know if your roof is good for solar power?<\/p>\n<p>Well, there are 3 things you&#8217;ve got to think about, one is the angle of your roof. The optimum angle of a roof to get the maximum amount of solar power averaged throughout the year is the same as the latitude of the location of that roof. So for example, latitude in Darwin is 12\u00b0, move south to Sydney &#8211; is about 34\u00b0 and then if you get as far south as Hobart, it climbs up to 47\u00b0. So for example, in Sydney the perfect angle for solar panels is 34\u00b0 from horizontal. Now you probably don\u2019t even know what the roof angle is, why should you? If you have a house in Australia it&#8217;s probably between 18\u00b0 and 22\u00b0.<\/p>\n<p>&#8220;Oh no its not 34\u00b0!&#8221;, what does that mean? Well, it means almost nothing. As a rule of thumb if there is a difference of 10\u00b0 that\u2019s going to translate to a less than 5% hit to your power output. So in other words, it\u2019s really not worth worrying about, in fact I&#8217;d goes far to say that if your roof has got any angle at all, don\u2019t worry about it.<\/p>\n<p>A good solar installer will tell you what the power hit is because you haven\u2019t got the perfect angle. Even in the worst case it will be a lot less than 10%. Let them work that out for you. \u00a0But as a rule of thumb, if your roof has got any angle at all just don\u2019t worry about racking, you\u2019ll take a small power hit if it\u2019s not exactly the latitude but it will be very small compared to other things.<\/p>\n<p>Now, the one exception to that the rule is if you\u2019ve got flat roof. \u00a0The problem is that if it rains and you&#8217;ve got dust on the panels, it\u2019s not going to self clean because the water is not going to slide off.\u00a0 So if you\u2019ve got a flat roof, then you probably want to consider racking, which is quite expensive &#8211; probably a $60 per solar panel and if you\u2019re going to get racking then you might as well put the panels on a perfect angle which is the latitude of wherever the roof&#8217;s located.<\/p>\n<p>The next thing you should consider is the direction that your roof&#8217;s facing, I\u2019ll go into a lot more detail on this in the next video. But, in Australia, in the southern hemisphere, the perfect direction is north. If you haven\u2019t got a north facing roof area or have a very small north facing roof area, then&#8230;five years ago when solar panels were 4 times the price, I would not have recommended that you put them on a east or west facing roof because they would turn what was then a kind of marginal investment into a &#8220;nuts&#8221; investment, that 15% would have really hurt you. Five years later, solar panels are a quarter of the price, you will get about a 15% power hit compared to a north facing roof, if you go east or west, which in the scheme of things with the price of solar panels now, is not a really a big deal for most people. So if you have only got an east or west facing roof, it\u2019s not a show stopper.<\/p>\n<p>The last one, the biggie&#8230; is shading. If any shade at all falls on your roof, then the only way to quantify whether that is going to be a problem or how big of a problem it is going to be, because there will be a problem &#8211; shading is a problem, is to get a proper shade analysis done. Now unfortunately, not many solar installers do this, but if you have shade on your roof, it really is worth finding a solar installer that will get an instrument called a &#8220;Sun Eye&#8221; that looks like this. They go up, they stick it on the roof, they press the button, it takes a 360 degree picture of the tree line or anything that casts a shadow on your roof. It\u2019s got a GPS in it so it knows exactly where in the world it is, it calculates any time of day, any time of year, for the whole year where the sun is going to be. It produces a sun profile, a shading profile and it quantifies almost exactly how much shade will fall on the solar panels throughout the year. And it&#8217;ll give you a number &#8211; you\u2019ll get a 40% hit, you get a 20% hit etc, but that is the only way to quantify it.<\/p>\n<p>I\u2019ve seen some advice on websites, terrible advice saying, &#8220;oh look on nearmaps for shade&#8221; which is a mapping website, you can look in winter, you can look in summer, you can see where the shade is, that\u2019s bullshit! Nearmaps will give you one slice of time, you know maybe 3 o&#8217; clock on a June afternoon, you know&#8230; move along 3 hours and the shade will be somewhere completely different. So there\u2019s no other solution that I know of that will quantify whether shade is a problem on your roof.<\/p>\n<p>I\u2019ve written a long detail blog post explaining exactly what\u2019s involved in <a href=\"https:\/\/www.solarquotes.com.au\/blog\/how-to-be-sure-that-shading-wont-kill-your-solar-power-systems-output\/\">a Suneye shade analysis<\/a>.<\/p>\n<p>So the three things you&#8217;e got to worry about when you\u2019re considering if your roof, has potential for solar is &#8211; the angle, if it\u2019s not the same as the latitude of where the roof&#8217;s located, it\u2019s not perfect, but it\u2019s probably not an issue unless you\u2019ve got a flat roof. The next thing is the direction, ideally it will be north facing but like I said, west and east is can be pretty good these days because solar panels are a lot cheaper than they used to be. And then the shading, if you\u2019ve got any shading on your roof at all, try and find a solar installer that will do the proper shade analysis. They\u2019re pretty hard to find, it drives me up the wall that more of them don\u2019t do it but you know it\u2019s a big investment and shade will kill the output of a solar power system, so get a shading analysis system if you have shade issues.<\/p>\n<p>A good solar salesman, a good solar installer will tell you what&#8217;s imperfect about your roof because it\u2019s probably imperfect and they\u2019ll give you a number, a percentage away from perfect that your solar power system will be. So you know, they&#8217;ll tell you that you are going to take 10% hit, a 20% hit based on your angle, your direction and your shade. You want to know that number and then you can make up your own mind as to whether it\u2019s worth proceeding.<\/p>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Back to the absolute solar basics today on the SQ blog! In this video I describe the 3 things you need to understand about your roof before buying a solar power system. And here&#8217;s the transcript if my pink shirt gets too much for you:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","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":[46],"tags":[112,114,408,257],"class_list":["post-2054","post","type-post","status-publish","format-standard","hentry","category-solar-panels-2","tag-buyers-guide","tag-roof","tag-shade","tag-video","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>How Do You Know If Your Roof Is Good For Solar Power? - SolarQuotes Blog<\/title>\n<meta name=\"description\" content=\"In this video I describe the 3 important things you need to understand about your roof before buying a solar power system.\" \/>\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\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Do You Know If Your Roof Is Good For Solar Power?\" \/>\n<meta property=\"og:description\" content=\"In this video I describe the 3 important things you need to understand about your roof before buying a solar power system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\" \/>\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=\"2012-11-01T04:50:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-01T01:31:09+00:00\" \/>\n<meta name=\"author\" content=\"Finn Peacock\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@FinnPeacock\" \/>\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\/how-do-you-know-if-your-roof-is-good-for-solar-power\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\"},\"author\":{\"name\":\"Finn Peacock\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#\/schema\/person\/495c35fb3086e6ef93220dcf2472b178\"},\"headline\":\"How Do You Know If Your Roof Is Good For Solar Power?\",\"datePublished\":\"2012-11-01T04:50:19+00:00\",\"dateModified\":\"2024-05-01T01:31:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\"},\"wordCount\":1245,\"commentCount\":4,\"publisher\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#organization\"},\"keywords\":[\"buyers guide\",\"roof\",\"shade\",\"video\"],\"articleSection\":[\"Solar Panels\"],\"inLanguage\":\"en-AU\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\",\"url\":\"https:\/\/www.solarquotes.com.au\/blog\/how-do-you-know-if-your-roof-is-good-for-solar-power\/\",\"name\":\"How Do You Know If Your Roof Is Good For Solar Power? 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I started SolarQuotes in 2009 and the SolarQuotes blog in 2013 with the belief that it\u2019s more important to be truthful and objective than popular. My last \"real job\" was working for the CSIRO in their renewable energy division. Since 2009, I\u2019ve helped over 800,000 Aussies get quotes for solar from installers I trust. Read my full bio.","sameAs":["https:\/\/www.solarquotes.com.au\/","https:\/\/x.com\/FinnPeacock"],"url":"https:\/\/www.solarquotes.com.au\/blog\/author\/admin\/"}]}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2FF2s-x8","jetpack-related-posts":[{"id":29626,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-panels-tilt-angle\/","url_meta":{"origin":2054,"position":0},"title":"The Best Tilt For Solar Panels By Australian Capital:  It&#8217;s Not Equal To Latitude","author":"Ronald Brakels","date":"April 24, 2019","format":false,"excerpt":"This article is about the best angle to tilt solar panels for the maximum possible energy yield over a year.\u00a0 It's a common belief that panel tilt from horizontal should equal a location's latitude, but this is not quite correct. In 7 of Australia's 8 capitals the best angle is\u2026","rel":"","context":"In &quot;Solar Panels&quot;","block_context":{"text":"Solar Panels","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-panels-2\/"},"img":{"alt_text":"Best solar panel tilt angles","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/04\/solar-panel-tilt-angles.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/04\/solar-panel-tilt-angles.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/04\/solar-panel-tilt-angles.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/04\/solar-panel-tilt-angles.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/04\/solar-panel-tilt-angles.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":1796,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-panel-tilt-frames-are-they-worth-it\/","url_meta":{"origin":2054,"position":1},"title":"Solar Panel Tilt Frames: Are they worth it?","author":"Finn Peacock","date":"July 15, 2012","format":false,"excerpt":"To tilt or not to tilt your solar panels. That is the question.","rel":"","context":"In &quot;Solar Installation&quot;","block_context":{"text":"Solar Installation","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-installation\/"},"img":{"alt_text":"tilt frames for solar panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2012\/07\/tilt-frames1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":2908,"url":"https:\/\/www.solarquotes.com.au\/blog\/truth-roof-solar-power-3-questions-must-ask\/","url_meta":{"origin":2054,"position":2},"title":"The Truth About Your Roof And Solar Power: 3 Questions You Must Ask.","author":"Finn Peacock","date":"October 11, 2013","format":false,"excerpt":"Imagine you walk in a shoe store and the shop assistant immediately starts measuring your head with a tape measure. You'd think she was mad, wouldn't you? And you'd be right, of course. Sometimes the basics are just self-evident. If you need shoes, all the information you need is right\u2026","rel":"","context":"In &quot;Solar Installation&quot;","block_context":{"text":"Solar Installation","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-installation\/"},"img":{"alt_text":"roof with panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2013\/10\/solar-roof.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":56172,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-flat-roof-east-west-tilts\/","url_meta":{"origin":2054,"position":3},"title":"Solar Panels On A Flat Roof? Consider East-West Tilts","author":"Finn Peacock","date":"November 22, 2021","format":false,"excerpt":"To maximise the solar energy generated over a year, the perfect roof to install solar panels on in Australia is large, north-facing and inclined at an angle close to the location's latitude. Panels mounted parallel to this perfect roof will be optimised for annual energy yield, and in most parts\u2026","rel":"","context":"In &quot;Solar Installation&quot;","block_context":{"text":"Solar Installation","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-installation\/"},"img":{"alt_text":"Solar panels on a flat root - tilts","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/11\/e-w-tilt.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/11\/e-w-tilt.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/11\/e-w-tilt.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/11\/e-w-tilt.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/11\/e-w-tilt.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":58108,"url":"https:\/\/www.solarquotes.com.au\/blog\/south-facing-solar-panels\/","url_meta":{"origin":2054,"position":4},"title":"Solar Panels On A South Facing Roof Can Pay Anywhere In Australia","author":"Ronald Brakels","date":"February 7, 2022","format":false,"excerpt":"TLDR: Can you put solar panels facing south in Australia? Hell yeah! In 2010, when Australian rooftop solar power really started to take off, nearly every Australian solar system faced north to maximise energy yield.\u00a0 But today, on an unshaded roof, panels facing any direction can pay for themselves.\u00a0 This\u2026","rel":"","context":"In &quot;Solar Installation&quot;","block_context":{"text":"Solar Installation","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-installation\/"},"img":{"alt_text":"South facing panels - worth it in Australia","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/02\/south-facing-panels.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/02\/south-facing-panels.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/02\/south-facing-panels.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/02\/south-facing-panels.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/02\/south-facing-panels.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":19314,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-panels-flat-roof\/","url_meta":{"origin":2054,"position":5},"title":"Installing Solar Panels On A Flat Roof &#8212; All The Angles Covered","author":"Ronald Brakels","date":"February 20, 2018","format":false,"excerpt":"If you are checking out this article because you are planning to put solar panels on a flat roof, then odds are you're looking to install a commercial solar system.\u00a0 While there are homes with flat roofs, they're not nearly as common as flat business roofs.\u00a0 But whether it's for\u2026","rel":"","context":"In &quot;Commercial Solar&quot;","block_context":{"text":"Commercial Solar","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/commercial-solar\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/02\/solar-on-a-flat-roof.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/02\/solar-on-a-flat-roof.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/02\/solar-on-a-flat-roof.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/02\/solar-on-a-flat-roof.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/2054","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/comments?post=2054"}],"version-history":[{"count":5,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/2054\/revisions"}],"predecessor-version":[{"id":83231,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/2054\/revisions\/83231"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=2054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=2054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=2054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}