{"id":14267,"date":"2017-08-25T09:00:28","date_gmt":"2017-08-24T22:30:28","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=14267"},"modified":"2024-01-03T18:53:49","modified_gmt":"2024-01-03T09:23:49","slug":"sun-flux-review-hot-water-with-dedicated-solar-pv-panels","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/","title":{"rendered":"Sun Flux Review: Hot Water With Dedicated Solar PV Panels"},"content":{"rendered":"<div id=\"attachment_14451\" style=\"width: 965px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14451\" class=\"wp-image-14451 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-2-1.png\" alt=\"Sun Flux Direct PV Hot Water System\" width=\"955\" height=\"578\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-2-1.png 955w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-2-1-300x182.png 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-2-1-768x465.png 768w\" sizes=\"(max-width: 955px) 100vw, 955px\" \/><p id=\"caption-attachment-14451\" class=\"wp-caption-text\">The Sun Flux is a box of electronics with one function: heating water with solar electricity.<\/p><\/div>\n<p>I recently <a href=\"https:\/\/www.solarquotes.com.au\/blog\/solar-hot-water-diverters-vs-batteries\/\">wrote about solar hot water diverters<\/a><sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-1' id='enref-14267-1' onclick='return hhEndnotes_show(14267)'>1<\/a><\/sup> which use <em>surplus<\/em> electricity from an existing rooftop solar system to heat water.<\/p>\n<p>Another option for heating your water with solar electricity is to use dedicated solar panels. These panels put all their power directly into the hot water cylinder&#8217;s heating element. When the water hits its temperature set point the panels are deactivated.<!--more--><\/p>\n<p>If there is not enough sun, you can use grid electricity to boost the heating. The grid power is kept\u00a0on a separate circuit &#8211; so the panels never connect to the grid.<\/p>\n<p>This is what the &#8216;Sun Flux&#8217; hot water controller does. This device uses dedicated, off-grid solar panels to power a conventional electric hot water cylinder.<\/p>\n<p>Using dedicated solar panels has its advantages:<\/p>\n<ul>\n<li>Your regular household solar system can continue to send its surplus solar electricity into the grid for a feed-in tariff.<\/li>\n<li>Because it&#8217;s off-grid you can install panels to power the Sun Flux even if your Distributed Network Service Provider (<a href=\"https:\/\/www.solarquotes.com.au\/glossary.html#dnsp\">DNSP<\/a>) won&#8217;t allow you to add any more on-grid solar capacity.<\/li>\n<li>As a safety precaution, standard rooftop solar will shutdown during blackouts, but the Sun Flux will keep working and heating water as long as the sun shines<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-2' id='enref-14267-2' onclick='return hhEndnotes_show(14267)'>2<\/a><\/sup>.<\/li>\n<\/ul>\n<p>But\u00a0not connecting the panels to the grid (or any other house circuits) has a disadvantage:<\/p>\n<ul>\n<li>You will waste some of your solar capacity. Once your hot water reaches its maximum temperature, the solar electricity produced by the Sun Flux&#8217;s dedicated panels has nowhere to go. \u00a0It can&#8217;t power your home or earn a feed-in tariff.<\/li>\n<\/ul>\n<p>In warm climes, if hot water use is low the Sun Flux can supply all of a household&#8217;s hot water using solar power. \u00a0But most Australian homes are below the sub tropics, and in winter they will need to import grid power to supplement the panels&#8217; output<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-3' id='enref-14267-3' onclick='return hhEndnotes_show(14267)'>3<\/a><\/sup>.<\/p>\n<h2>Sun Flux 1 &#8211; Manual switching<\/h2>\n<p>There are two versions of the Sun Flux.\u00a0 The first version is just called Sun Flux, but I will call it <a href=\"http:\/\/www.sharpenergyinvestments.com\/sun-flux\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sun Flux 1<\/a> to try to avoid confusion.\u00a0 It has a switch for manually changing a single-element hot water system to grid power when a boost is required.<\/p>\n<div id=\"attachment_14409\" style=\"width: 410px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14409\" class=\"size-full wp-image-14409\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-01.png\" alt=\"sun flux 1\" width=\"400\" height=\"354\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-01.png 400w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-01-300x266.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><p id=\"caption-attachment-14409\" class=\"wp-caption-text\">The Sun Flux 1 (Image: Sharp Energy)<\/p><\/div>\n<p>Does anticipating when your cylinder will get too cold hours before it happens, then running to flick a switch, then remembering to switch it back to solar sound stressful?<\/p>\n<p>Then you probably want to forget about the Sun Flux 1 and look into the Sun Flux 2.<\/p>\n<h2>Sun Flux 2 &#8211; Automatic Switching<\/h2>\n<p>The <a href=\"https:\/\/arrayenergy.com.au\/products\/sun-flux-ii\" target=\"_blank\" rel=\"noopener noreferrer\">Sun Flux 2<\/a> is designed for connection\u00a0to the bottom element of dual-element hot water systems. \u00a0If the Sun Flux isn&#8217;t able to adequately heat water with solar the top element will activate automatically using grid electricity.<\/p>\n<div id=\"attachment_14410\" style=\"width: 410px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14410\" class=\"size-full wp-image-14410\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-41.png\" alt=\"Sun Flux 2\" width=\"400\" height=\"332\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-41.png 400w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_14-53-41-300x249.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><p id=\"caption-attachment-14410\" class=\"wp-caption-text\">Sun Flux 2 (Image: Sharp Energy)<\/p><\/div>\n<p>The Sun Flux is installed by <a href=\"http:\/\/www.arrayenergy.com.au\/\" target=\"_blank\" rel=\"noopener noreferrer\">Array Energy<\/a> who are located on the Gold Coast in Queensland and in Newcastle, New South Wales.\u00a0 They will fully install the Sun Flux and four 290 watt solar panels for $2,490.<\/p>\n<h2>It&#8217;s Made By Sharp Energy Investments<\/h2>\n<p><a href=\"http:\/\/www.sharpenergyinvestments.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sharp Energy Investments<\/a> is an Australian company that, as far as I know, has nothing to do with the Japanese Corporation <a href=\"https:\/\/en.wikipedia.org\/wiki\/Sharp_Corporation\" target=\"_blank\" rel=\"noopener noreferrer\">Sharp<\/a><sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-4' id='enref-14267-4' onclick='return hhEndnotes_show(14267)'>4<\/a><\/sup>.<\/p>\n<h2>It Sends DC Power To The Heating Element<\/h2>\n<p>The elements in electric hot water systems use <a href=\"https:\/\/www.solarquotes.com.au\/glossary.html#ac\">AC<\/a> power, which is what the grid supplies.\u00a0 But the Sun Flux is not an <a href=\"https:\/\/www.solarquotes.com.au\/glossary.html#inverter\">inverter<\/a> and does not change the solar panels&#8217; <a href=\"https:\/\/www.solarquotes.com.au\/glossary.html#dc\">DC<\/a> power into AC power.\u00a0 Instead it changes the DC into a form the element can use to produce heat.\u00a0 Because of this, the Sun Flux can&#8217;t be used to power anything other than a heating element.<\/p>\n<h2>Sun Flux Is Only Suitable For 2.4 And 3.6 Kilowatt Elements<\/h2>\n<p>The subheading said it in big type and I&#8217;ll say it again in little type &#8212; the Sun Flux can only be used with 2.4 and 3.6 kilowatt heating elements.<\/p>\n<h2>Sun Flux Capacity Is Only 1 Kilowatt<\/h2>\n<p>While the Sun Flux can have more than 1 kilowatt of panels attached to it, the unit itself can only supply a maximum one kilowatt to a hot water system.\u00a0 This is not a lot and only enough to raise the temperature of a 250 liter hot water system by 3.4\u00baC an hour at full power.\u00a0 Because of losses resulting from heat, dirt, and other factors, its solar panels may rarely, or possibly even never, allow it operate at its full one kilowatt capacity.<\/p>\n<h2>It Is &#8220;Up To&#8221; 96% Efficient<\/h2>\n<p>Sharp Energy Investments says the Sun Flux is up to 96% efficient.\u00a0 Unfortunately, this is not very useful information.\u00a0 My car can be up to 99.9% efficient at converting (potential) energy into (downward) movement if I drive it off a cliff.\u00a0 But in normal operation my car is only about 20% efficient.\u00a0 Details are important.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-14412 aligncenter\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/200.gif\" alt=\"\" width=\"267\" height=\"200\" \/><\/p>\n<p>But I will assume its average efficiency is not too far off 96%.\u00a0 We can be sure it doesn&#8217;t average 2% on account of the fact it actually works.<\/p>\n<h2>A 2 Element Hot Water System Is Advantageous<\/h2>\n<p>If you have a two element hot water system the Sun Flux 2 can be attached to the lower element in the hot water tank.\u00a0 The upper element is left connected to the grid and set at 10 to 20\u00baC lower.\u00a0 This way, if the Sun Flux is unable to do an adequate job of heating water, the upper element will come on.\u00a0 So if the lower Sun Flux element is set at 65\u00baC the upper one could be set at 45\u00baC.\u00a0 When it&#8217;s not stinking hot an average shower temperature is 41\u00baC.<\/p>\n<p><em><strong>Update 26 August: <\/strong>In order to control potentially fatal\u00a0<em><a href=\"https:\/\/en.wikipedia.org\/wiki\/Legionella\" target=\"_blank\" rel=\"noopener noreferrer\">Legionella bacteria<\/a> <\/em>and other dangerous microorganisms, the upper element may need to be set to a minimum of 60 degrees, or the hot water system will need to be able to automatically raise its temperature to at least 60 degrees every 3 days or so if the Sun Flux is unable to do so.\u00a0 If the hot water system can&#8217;t automatically raise its temperature, this limits the maximum temperature for the Sun Flux connected bottom element for hot water systems that lack tempering valves that reduce the risk of scald injuries by limiting the temperature of water that comes out of taps to 50 degrees.<\/em><\/p>\n<p>The lower the temperature difference between the upper and lower elements, the more likely it is that grid electricity will be used at times to heat water.<\/p>\n<p>Roughly 20 to 30% of homes have 2 element hot water systems, with them being more common in colder parts of the country.<\/p>\n<p>If a hot water system only has one heating element, it can be used with a Sun Flux 1 which has a switch that can be manually used to change a hot water system to grid power.<\/p>\n<h2>It Can Be Used With Controlled Load Or Economy Tariffs<\/h2>\n<p>The majority of Australian electric hot water systems are on controlled load tariffs<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-5' id='enref-14267-5' onclick='return hhEndnotes_show(14267)'>5<\/a><\/sup>.\u00a0 These allow households to pay less for electricity powering their hot water systems.\u00a0 The disadvantage is this power isn&#8217;t always available and is often only provided in the early hours of the morning<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-6' id='enref-14267-6' onclick='return hhEndnotes_show(14267)'>6<\/a><\/sup>.\u00a0 The Sun Flux allows households to keep their controlled load tariff.<\/p>\n<p>If you are relying on a manual switch to provide grid power to your hot water system when solar electricity isn&#8217;t sufficient, then having a controlled load tariff will clearly complicate matters.<\/p>\n<h2>It Is Normally Installed With 4 Panels<\/h2>\n<p>Array Energy told me they normally install the Sun Flux with four 290 watt panels for a total of 1.16 kilowatts of PV capacity.\u00a0 This is not enough PV for a typical household to get 100% of their hot water from solar.<\/p>\n<p>One testimonial said in regard to electricity used for hot water:<\/p>\n<blockquote><p>&#8220;You save around about half your bill in the winter and a very high amount, maybe 85, 90% or more in the summer.&#8221;<\/p><\/blockquote>\n<p><strong>In sunny Brisbane:<\/strong><\/p>\n<p>In Brisbane, a typical two person household could potentially heat all their hot water with solar electricity with 1.16 kilowatts of panels in summer.<\/p>\n<p>As for winter, if we assume the Sun Flux operates at an average efficiency of 95% then with north facing, unshaded panels, in June, it will only generate a daily average of 3.8 kilowatt-hours. That compares to the 4-5 kilowatt-hours a day they&#8217;ll typically need for water heating. So pretty close.<\/p>\n<p><strong>In not-so-sunny Melbourne:<\/strong><\/p>\n<p>But in Melbourne in June it is a lot colder than Brisbane and solar production is much worse. \u00a0In June 1.16 kilowatts of panels will only produce an average of 2.6 kilowatt-hours a day. That will only provide a third of the typical winter hot water needs of a two person household in Melbourne<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-7' id='enref-14267-7' onclick='return hhEndnotes_show(14267)'>7<\/a><\/sup>.<\/p>\n<h2>It Can Have 6 Panels<\/h2>\n<p>Sharp Energy Investments says the Sun Flux can have from 2 to 6 panels.\u00a0 If 300 watt panels were used then 6 of them would come to 1.6 kilowatts.\u00a0 This would definitely reduce the amount of grid electricity required, but any electricity generated above the Sun Flux&#8217;s maximum power of 1 kilowatt will be wasted and for modest users of hot water the extra panels are likely to provide little or no benefit in summer.<\/p>\n<h2>More Panels Mean More Expense<\/h2>\n<p>Adding more panels to a Sun Flux will increase its cost.\u00a0 Because the Sun Flux&#8217;s capacity is only 1 kilowatt a maximum of 1.33 kilowatts of its solar panel capacity can receive <a href=\"https:\/\/www.solarquotes.com.au\/glossary.html#stc\">STC<\/a>s that lower the cost of solar<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-8' id='enref-14267-8' onclick='return hhEndnotes_show(14267)'>8<\/a><\/sup>.<\/p>\n<p>Fortunately, because the Sun Flux panels are off-grid, the 1.33 kilowatt limit can be exceeded, you just can&#8217;t claim STCs on any panels over the 133% limit.\u00a0 With on-grid solar there is a risk that no STCs at all will be given if your <a href=\"https:\/\/www.solarquotes.com.au\/blog\/oversizing-solar-arrays\/\" target=\"_blank\" rel=\"noopener noreferrer\">panel array totals over 133% of the inverter capacity<\/a>.<\/p>\n<h2>The Sun Flux Only Has A 2 Year Warranty<\/h2>\n<p>The Sun Flux&#8217;s warranty is only for 2 years.\u00a0 This is despite the fact they clearly state:<\/p>\n<p><img decoding=\"async\" class=\"wp-image-14391 aligncenter size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/reliableBMP.jpg\" alt=\"Reliability Statement\" width=\"600\" height=\"31\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/reliableBMP.jpg 600w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/reliableBMP-300x16.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>If it is very reliable, why does it only have a 2 year warranty?\u00a0 Personally, I would require a significantly longer warranty than this for any kind of solar hardware.\u00a0 Hopefully Sharp Energy Investments will improve on it soon.<\/p>\n<p>Array Energy says it is possible to extend the warranty to 5 years.<\/p>\n<h2>Sun Flux Return On Investment<\/h2>\n<p>On the Sharp Energy Investments <a href=\"http:\/\/www.sharpenergyinvestments.com\/faqs\/\" target=\"_blank\" rel=\"noopener noreferrer\">FAQ page<\/a> it says:<\/p>\n<div id=\"attachment_14384\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14384\" class=\"wp-image-14384 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sharpfaq.jpg\" alt=\"Nope\" width=\"600\" height=\"50\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sharpfaq.jpg 600w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sharpfaq-300x25.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-14384\" class=\"wp-caption-text\">&#8220;The average Australian home can expect to save up to 40% on their electricity bill. Giving a return on investment of approximately 2years&#8221;<\/p><\/div>\n<p>The average Australian home without gas<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-9' id='enref-14267-9' onclick='return hhEndnotes_show(14267)'>9<\/a><\/sup> uses around 6,000 kilowatt-hours of electricity a year, so 40% of that would be 2,400 kilowatt-hours.\u00a0 Even with north facing panels and zero shade, if the Sun Flux&#8217;s recommended 4 panels total 1.16 kilowatts, then on the average Australian roof they will provide around 1,700 kilowatt-hours a year to the hot water system.\u00a0 This is 28% of the average household&#8217;s electricity consumption.<\/p>\n<p>With six panels totaling 1.6 kilowatts on the average roof the Sun Flux will only provide 2,200 kilowatt-hours to a hot water system. That is 38% of average household electricity consumption, close to 40%.<\/p>\n<p>So does the 40% figure scrape by as being legit?\u00a0 No it doesn&#8217;t.\u00a0 This is because the average household does not use 40% of its electricity consumption to heat water.\u00a0 The figure is around 25% for homes with electric hot water systems. The fact that the average Australian household heats their water on a cheaper off peak\/controlled load tariff makes it worse.<\/p>\n<h2>Possible Savings Per Year By Capital<\/h2>\n<p>Let&#8217;s say your household is a large user of hot water and so electricity provided by the Sun Flux&#8217;s panels never goes to waste.\u00a0 In addition, they face north and are completely unshaded.\u00a0 Here in Adelaide it is possible to have a controlled load tariff as low as 15.5 cents a kilowatt-hour. On this tariff the Sun Flux would save $275 a year on electricity bills.\u00a0 If the controlled load tariff was a more typical 24 cents then it would save $432.<\/p>\n<p>For average hot water usage, the maximum amount of savings possible from installing a Sun Flux in Australian capitals are shown below. \u00a0I&#8217;ve shown the three cheapest tariffs for heating water in each city.\u00a0 The costs of controlled load tariffs are shown where available<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sun-flux-review-hot-water-with-dedicated-solar-pv-panels\/#en-14267-10' id='enref-14267-10' onclick='return hhEndnotes_show(14267)'>10<\/a><\/sup>.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-14414 aligncenter size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_16-36-22.png\" alt=\"\" width=\"534\" height=\"147\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_16-36-22.png 534w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2017-08-24_16-36-22-300x83.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><\/p>\n<div id=\"attachment_14415\" style=\"width: 541px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14415\" class=\"wp-image-14415 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-savings.png\" alt=\"sun flux hot water savings graph per city\" width=\"531\" height=\"1017\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-savings.png 531w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/sun-flux-savings-157x300.png 157w\" sizes=\"(max-width: 531px) 100vw, 531px\" \/><p id=\"caption-attachment-14415\" class=\"wp-caption-text\">Maximum savings per year for average homes.<\/p><\/div>\n<p>In reality the actual savings are likely to be less than this. Especially in sunnier locations, as not all the solar electricity the panels can produce is likely to be needed in summer.<\/p>\n<p>According to my calculations the highest return possible is in Adelaide if you are heating your water on a standard tariff of 32c per kWh. \u00a0But if you are in SA and have your hot water cylinder on a non-controlled tariff you&#8217;re off your trolley. Call up your retailer immediately and get a 2nd meter installed.<\/p>\n<p>The highest realistic return is in Perth.\u00a0 While not as ridiculously hot as Darwin, it is still a very warm city.\u00a0 But assuming a Sun Flux will allow a Perth household to save $531 a year, the simple payback for a $2,490 installation is 4.7 years.\u00a0 That is more than twice as long as its 2 year warranty.\u00a0 But if you feel lucky and assume the Sun Flux will last for far longer than its warranty, provided your hot water use is high enough, it could pay for itself after about 5 years.<\/p>\n<p>So even under the best possible circumstances, their claim that the Sun Flux is capable of&#8230;<br \/>\n<img decoding=\"async\" class=\"wp-image-14389 aligncenter size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2years.jpg\" alt=\"\" width=\"526\" height=\"60\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2years.jpg 526w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/2years-300x34.jpg 300w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/><\/p>\n<p>&#8230;is not true on any of the usages and tariffs above.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-14417 aligncenter size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/Seth-Meyers-exaggerating.gif\" alt=\"\" width=\"500\" height=\"250\" \/><\/p>\n<h2>The Sun Flux Is An Interesting Device<\/h2>\n<p>If you have a dual-element hot water cylinder and a want a solar electric hot water system that:<\/p>\n<ul>\n<li>allows you to legitimately circumvent DNSP restrictions on grid connected solar system size<\/li>\n<li>will operate during a blackout<\/li>\n<li>has no moving parts<\/li>\n<\/ul>\n<p>then you may find the Sun Flux 2 to be an intriguing option. But if you have typical hot water usage and are on a typical tariff I can&#8217;t see how the payback will be 2 years.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I recently wrote about solar hot water diverters1 which use surplus electricity from an existing rooftop solar system to heat water. Another option for heating your water with solar electricity is to use dedicated solar panels. These panels put all their power directly into the hot water cylinder&#8217;s heating element. When the water hits its [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":14408,"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":[27],"tags":[],"class_list":["post-14267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-hot-water","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>Sun Flux Review: Hot Water With Dedicated Solar PV Panels<\/title>\n<meta name=\"description\" content=\"The Sun Flux is an interesting way to get solar hot water. 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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":47398,"url":"https:\/\/www.solarquotes.com.au\/blog\/hot-water-vpp-mb1870\/","url_meta":{"origin":14267,"position":3},"title":"Electric Hot Water System VPP Trial In South Australia","author":"Michael Bloch","date":"February 8, 2021","format":false,"excerpt":"The Australian Renewable Energy Agency (ARENA) has announced funding for Rheem's Active Hot Water Control project in South Australia. 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How A Diverter Can Give You Solar Hot Water And Store Energy At A Lower Cost Than Batteries A solar hot water diverter is an electronic device that sends surplus electricity from your rooftop solar to your electric\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":"battery vs hot water cylinder","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/battery-vs-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\/2017\/08\/battery-vs-hot-water.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/battery-vs-hot-water.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2017\/08\/battery-vs-hot-water.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/14267","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\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/comments?post=14267"}],"version-history":[{"count":68,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/14267\/revisions"}],"predecessor-version":[{"id":80839,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/14267\/revisions\/80839"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media\/14408"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=14267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=14267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=14267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}