{"id":1959,"date":"2012-09-21T16:56:23","date_gmt":"2012-09-21T07:26:23","guid":{"rendered":"http:\/\/www.solarquotes.com.au\/blog\/?p=1959"},"modified":"2013-08-05T14:47:28","modified_gmt":"2013-08-05T05:17:28","slug":"what-should-you-buy-first-solar-hot-water-or-solar-pv","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/what-should-you-buy-first-solar-hot-water-or-solar-pv\/","title":{"rendered":"What Should You Buy First? Solar Hot Water or Solar PV?"},"content":{"rendered":"<p>Solar Hot Water is fast becoming the poor cousin of Solar PV (AKA Solar Electricity). Consumers just seem to prefer solar PV to solar hot water these days. In fact <a title=\"Solar Hot Water Quotes\" href=\"http:\/\/www.SolarHotWaterQuotes.com.au\">solar hot water<\/a> has gone from almost zero to 1,000,000 roofs in about 30 years, whereas PV has gone from almost zero to\u00a01,000,000 roofs in less than 6 years. There is now more PV than Solar HW out there! Unbelievable.<\/p>\n<p>It doesn&#8217;t help that retailers prefer to sell PV over hot water &#8211; for a whole bunch of reasons that I&#8217;ll go into in a future blog post.<\/p>\n<p>Here&#8217;s a video where I answer the question posed in the title: Should you buy Solar Hot Water or PV first?, But first I answer a much more fundamental question that creates an enormous amount of confusion out there:<\/p>\n<div class=\"youtube-wrapper\"><iframe title=\"What Is The Difference Between Solar Hot Water Panels And Solar Electricity Panels?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/jNyKnheMm5g?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;t the transcript for the video-phobes amongst you:<!--more--><\/p>\n<p>Okay so this is a really fundamental question that I get asked. A lot of people out there think the answer is obvious, but there is a lot of confusion about this. The question is:<\/p>\n<p><strong>What is the difference between a solar hot water panel and a solar electricity panel?<\/strong><\/p>\n<p>They are completely different things okay?<\/p>\n<p>A solar hot water panel often has an integrated tank so it stores the water on the roof with the panel, you can also get them without the tank, where the tank is on ground level.<\/p>\n<p>How do these panels work? It\u2019s really simple, you pump cold water literally through the panel, the sun comes in hits the glass &#8211;\u00a0 hits the water, heats the water &#8211; \u00a0the hot water gets pumped or is gravity fed to the hot tap. Simple as that.<\/p>\n<p>There are two main types of technology for solar hot water panels. First is the flat plate collector, called&#8230; &#8220;Flat plate&#8221;. The other is a funkier looking technology and I get into all sorts of trouble with so hot water dealers if I say they are more efficient. They are called Evacuated Tube and they\u2019re more expensive, as generally they convert more of the sun&#8217;s heat into heat in the water. Hence, why they\u2019re more efficient certainly more efficient at lower temperatures.<\/p>\n<p>So, if you live somewhere chilly like Melbourne or Tasmania, you are probably looking at evacuated tubes wheras if you live somewhere like Brisbane or Northern NSW, evacuated tube is probably a bit over the top.<\/p>\n<p>The second type of solar panel is the type of solar panel that people generally are thinking about when they think about solar &#8211; and that\u2019s the solar electricity panel.<\/p>\n<p>You typically put between 6 and 60 of these panels on a roof. \u00a0They are much smaller than solar hot water panels and all they do is they take the sunlight in and use a mixture of semi conductors and silicon to convert the sunlight into electricity, so you get sun in and electricity out.<\/p>\n<p><strong>What should you get first?<\/strong><\/p>\n<p>Another common question when we\u2019re talking about hot water and solar electricity is which type should you get first. The really simple answer to that question, is: it depends how you heat your water at the moment. If you use electricity to heat your water, get solar hot water first and the payback will be between 5 and 6 years and that will probably be a faster payback than solar electricity, which would be between 6 and 10 years.<\/p>\n<p>So get solar hot water first, if you have an electric hot water system at home.<\/p>\n<p>If you have a gas hot water system at home then it\u2019s completely the other way around. Gas heats water really efficiently anyway, so solar hot water will make it more efficient. But the payback if you&#8217;re retrofitting solar hot water to an existing gas system will probably be 15 to 20 years whereas if you get a PV system, the payback will be between 6 and 10 years.<\/p>\n<p>So that\u2019s the difference between solar hot water and solar PV and the answer to question which should you get first.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Solar Hot Water is fast becoming the poor cousin of Solar PV (AKA Solar Electricity). Consumers just seem to prefer solar PV to solar hot water these days. In fact solar hot water has gone from almost zero to 1,000,000 roofs in about 30 years, whereas PV has gone from almost zero to\u00a01,000,000 roofs in [&hellip;]<\/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":[27],"tags":[257],"class_list":["post-1959","post","type-post","status-publish","format-standard","hentry","category-solar-hot-water","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>What Should You Buy First? 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The concept of heating water directly from the Aussie sun with a solar hot water system like this... ...really seems to have gone from hero to zero over the past 3 years. Both homeowners and solar companies have been seduced by the siren call of\u2026","rel":"","context":"In &quot;Solar Hot Water&quot;","block_context":{"text":"Solar Hot Water","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-hot-water\/"},"img":{"alt_text":"a solahart hot water heater","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2014\/08\/shw.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2014\/08\/shw.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2014\/08\/shw.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":37723,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-hot-water-mb1421\/","url_meta":{"origin":1959,"position":1},"title":"The Best Way To Heat Your Water &#8211; Solar PV Or Solar Thermal?","author":"Michael Bloch","date":"February 26, 2020","format":false,"excerpt":"From flat plate thermal systems to heat pumps and solar PV diverters,\u00a0 in this video Finn takes a look at your solar hot water options. Video transcript: Did you know that there are two fundamentally different ways to generate solar energy and therefore two fundamentally different types of solar panel?\u2026","rel":"","context":"In &quot;General Solar &amp; Storage News&quot;","block_context":{"text":"General Solar &amp; Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"solar hot water","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/02\/solar-hot-water.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/02\/solar-hot-water.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/02\/solar-hot-water.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/02\/solar-hot-water.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/02\/solar-hot-water.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":89937,"url":"https:\/\/www.solarquotes.com.au\/blog\/end-of-solar-thermal-hot-water\/","url_meta":{"origin":1959,"position":2},"title":"Phase Shift: Why I Pulled The Plug On Solar Thermal Hot Water","author":"Finn Peacock","date":"March 1, 2025","format":false,"excerpt":"Two years ago, I ripped a perfectly functional solar thermal hot water system off my roof. It had been sitting there for a decade, dutifully heating about 70% of my water with the sun's heat (the rest boosted by gas). I removed it to use the precious north-facing roof space\u2026","rel":"","context":"In &quot;Solar Hot Water&quot;","block_context":{"text":"Solar Hot Water","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-hot-water\/"},"img":{"alt_text":"A crane hoists a solar thermal panel","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/02\/DBDA8DBF-DCC7-42F3-8064-CF147BEB8998_1_105_c.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/02\/DBDA8DBF-DCC7-42F3-8064-CF147BEB8998_1_105_c.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/02\/DBDA8DBF-DCC7-42F3-8064-CF147BEB8998_1_105_c.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/02\/DBDA8DBF-DCC7-42F3-8064-CF147BEB8998_1_105_c.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":75635,"url":"https:\/\/www.solarquotes.com.au\/blog\/raygen-and-alfa-laval\/","url_meta":{"origin":1959,"position":3},"title":"RayGen and Alfa Laval Push the Limits of Solar Efficiency In Victoria","author":"Richard Chirgwin","date":"June 8, 2023","format":false,"excerpt":"RayGen is building a concentrator-style PV power plant in Victoria with thermal storage, and incredible claimed efficiency, and they've picked Alfa Laval to provide the heat exchangers. RayGen's Self-Aligning Mirrors and 'PV Ultra' Solar Cell Array The RayGen self-aligning mirrors concentrate sunlight onto a tower-mounted receiver containing the 'PV Ultra'\u2026","rel":"","context":"In &quot;General Solar &amp; Storage News&quot;","block_context":{"text":"General Solar &amp; Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"raygen mirror arrays","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/raygen-csp-plant.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/raygen-csp-plant.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/raygen-csp-plant.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/raygen-csp-plant.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/raygen-csp-plant.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":75143,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-victoria-2023-rules\/","url_meta":{"origin":1959,"position":4},"title":"Solar Victoria Add More Rules For PV, Battery &#038; Heat Pump Installations","author":"Richard Chirgwin","date":"May 24, 2023","format":false,"excerpt":"Solar Victoria has published the 2023-2024 Notice To Market, including five new mandatory requirements and rather more recommendations. The notice lays out the rules retailers have to follow so their customers can take advantage of Victoria\u2019s rebates for solar PV, household battery, and heat pump hot water systems. The requirements,\u2026","rel":"","context":"In &quot;Solar Policy&quot;","block_context":{"text":"Solar Policy","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-policy\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/05\/solar-vic-23-24-rules.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/05\/solar-vic-23-24-rules.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/05\/solar-vic-23-24-rules.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/05\/solar-vic-23-24-rules.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/05\/solar-vic-23-24-rules.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":93332,"url":"https:\/\/www.solarquotes.com.au\/blog\/heat-pumps-win-the-hot-water-efficiency-war\/","url_meta":{"origin":1959,"position":5},"title":"Heat Pumps Win The Hot Water Efficiency War","author":"Max Opray","date":"August 5, 2025","format":false,"excerpt":"When it comes to efficiency, hot water heat pumps have long had the definitive edge over alternative technologies anywhere south of Brisbane. Our latest analysis further upgrades this advice: heat pumps today are the most efficient way to heat your hot water, no matter what area of Australia you live.\u2026","rel":"","context":"In &quot;Hot Water Heat Pumps&quot;","block_context":{"text":"Hot Water Heat Pumps","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/hot-water-heat-pumps\/"},"img":{"alt_text":"A hot water heat pump","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/07\/hot-water-heat-pump.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/07\/hot-water-heat-pump.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/07\/hot-water-heat-pump.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/07\/hot-water-heat-pump.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/07\/hot-water-heat-pump.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/1959","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=1959"}],"version-history":[{"count":4,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/1959\/revisions"}],"predecessor-version":[{"id":2760,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/1959\/revisions\/2760"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=1959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=1959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=1959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}