{"id":24813,"date":"2018-10-17T06:51:52","date_gmt":"2018-10-16T20:21:52","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=24813"},"modified":"2025-02-02T15:36:50","modified_gmt":"2025-02-02T06:06:50","slug":"sonnenflat-review","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/sonnenflat-review\/","title":{"rendered":"SonnenFlat Review: Is It A Good Deal?"},"content":{"rendered":"<div id=\"attachment_25125\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-25125\" class=\"wp-image-25125 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-flat-review.jpg\" alt=\"sonnenFlat review\" width=\"1200\" height=\"628\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-flat-review.jpg 1200w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-flat-review-300x157.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-flat-review-768x402.jpg 768w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-flat-review-1024x536.jpg 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><p id=\"caption-attachment-25125\" class=\"wp-caption-text\">SonnenFlat &#8212; good if you already have a Sonnen battery but maybe not good enough to buy a Sonnen battery.<\/p><\/div>\n<p><em><strong>Update Feb 2, 2025: Sonnen Flat ended June 2024 and so is no longer available.<\/strong><\/em><\/p>\n<p>I think the German home energy storage company, Sonnen, must be having an exciting time in Australia at the moment:<!--more--><\/p>\n<ul>\n<li>Their <a href=\"https:\/\/www.solarquotes.com.au\/blog\/sonnen-battery-update-review\/\">latest generation<\/a> of home battery systems is now available.<\/li>\n<li>South Australia has introduced a <a href=\"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/\">hefty battery subsidy<\/a> that may be exclusive to Sonnen systems for its first two months.<\/li>\n<li>Sonnen is creating a <a href=\"https:\/\/www.solarquotes.com.au\/blog\/adelaide-sonnen-batteries-mb0477\/\">battery assembly plant<\/a> in Adelaide that will apparently employ over 400 people.\u00a0 I&#8217;ve been told it will start cranking out battery systems in November.<\/li>\n<\/ul>\n<p>While <a href=\"https:\/\/www.solarquotes.com.au\/blog\/new-lg-chem-resu-batteries-smaller-powerful-cheaper-powerwall\/\">LG Chem<\/a> is the largest supplier of battery systems in Australia at this time, Sonnen should start to gain some ground, especially since the Powerwall 2 is <a href=\"https:\/\/www.solarquotes.com.au\/blog\/tesla-powerwall-2-delay\/\">hard to get<\/a> and very recently <a href=\"https:\/\/www.solarquotes.com.au\/blog\/tesla-powerwall-2-price-rise\/\">increased in price<\/a> (again).<\/p>\n<p>With all the activity at Sonnen Australia, now is a good time to tell you the details of a deal available to homes that have a large enough solar power system and a large enough Sonnen battery.\u00a0 It&#8217;s called sonnenFlat and supplies you with all the electricity you need &#8212; up to a limit &#8212; for one flat fee per month.<\/p>\n<p>If you have a suitable Sonnen battery and solar power system sonnenFlat is likely to save you money, but it will depend on your location and circumstances.\u00a0 By joining sonnenFlat your battery becomes part of a Virtual Power Plant and Sonnen will take control of it and use it to make money trading electricity and supporting the grid.\u00a0 Unfortunately, while it can pay for itself if you already have a Sonnen battery, the benefits of sonnenFlat may not be enough to make you go out and buy a brand new Sonnen battery.<\/p>\n<h2>Availability<\/h2>\n<p>SonnenFlat is only available in the National Electricity Market, which counts out Western Australia and the Northern Territory.\u00a0 It&#8217;s also not available in Victoria.\u00a0 I don&#8217;t know why Victoria is left out.\u00a0 I guess they&#8217;re just not <a href=\"https:\/\/youtu.be\/7pohEb7DUac?t=7\" target=\"_blank\" rel=\"noopener\">not cool<\/a> enough.\u00a0 But Sonnen says it will be available soon.\u00a0 I&#8217;ve also been told it&#8217;s not available in the Ergon network area, which covers regional Queensland.<\/p>\n<p>The areas where sonnenFlat is available are:<\/p>\n<ul>\n<li>South Australia<\/li>\n<li>NSW<\/li>\n<li>Tasmania<\/li>\n<li>South East Queensland<\/li>\n<li>ACT<\/li>\n<\/ul>\n<p>When I went to <a href=\"https:\/\/sonnen.com.au\/\" target=\"_blank\" rel=\"noopener\">this Sonnen page<\/a> and tried to bring up information on the Essential network area that covers regional NSW the link didn&#8217;t work.\u00a0 But I have been assured this is an error and sonnenFlat is available there.<\/p>\n<h2>Requirements &#8212; Solar, Sonnen Battery, &amp; Smart Meter<\/h2>\n<p>There are three requirements to get sonnenFlat:<\/p>\n<ul>\n<li>A solar power system with at least 5 kilowatts of capacity.<\/li>\n<li>A Sonnen battery with at least 8 kilowatt-hours of capacity.<\/li>\n<li>A smart meter.<\/li>\n<\/ul>\n<p>The size of the solar power system and Sonnen battery determines which of the three sonnenFlat plans you can get.\u00a0 If you don&#8217;t have a smart meter then Sonnen will charge $207.90 to install one.<\/p>\n<div id=\"attachment_25105\" style=\"width: 468px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-25105\" class=\"size-full wp-image-25105\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/stan.jpg\" alt=\"\" width=\"458\" height=\"458\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/stan.jpg 458w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/stan-150x150.jpg 150w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/stan-300x300.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/stan-100x100.jpg 100w\" sizes=\"(max-width: 458px) 100vw, 458px\" \/><p id=\"caption-attachment-25105\" class=\"wp-caption-text\">&#8220;I&#8217;m glad you&#8217;re excited about sonnenFlat, Stanley, but are you sure you should be saluting like that? It&#8217;s not very sensitive.&#8221;<\/p><\/div>\n<h2>SonnenFlat Plans &#8212; Economy, Family, &amp; Autonomy<\/h2>\n<p>There are three different sonnenFlat plans based on how much electricity your home can consume per year before you start being charged extra.\u00a0 The plans and their Annual Usage Allowances are:<\/p>\n<ul>\n<li>Economy: 7,500 kilowatt-hours<\/li>\n<li>Family: 10,000 kilowatt-hours<\/li>\n<li>Autonomy: 12,500 kilowatt-hours<\/li>\n<\/ul>\n<p>The usage allowance covers all the electricity consumed by your home.\u00a0 It doesn&#8217;t matter if it comes direct from your solar power system, from solar energy stored in your battery, or from the grid &#8212; it all counts towards the Annual Usage Allowance.<\/p>\n<p>Most Australian households use under 7,500 kilowatt-hours a year.\u00a0 This suggests the Economy plan should be enough for most homes, but only those with high electricity consumption are likely to install a Sonnen battery, so it will come down to individual circumstances.<\/p>\n<p>The good news is the Annual Usage Allowance does cover a full year and is not divided up into months or quarters.\u00a0 This means if you use a lot of electricity in winter but not so much in summer, or vice versa, it will average out over a year.<\/p>\n<h2>You Must Prove Yourself To Sonnen<\/h2>\n<p>Sonnen requires proof your electricity use over the past year did not exceed the Usage Allowance for your chosen plan.\u00a0 I&#8217;m surprised this is necessary given they charge for excess usage.<\/p>\n<p>Also you must grant them access to your battery, both physically and cybernetically:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-25112 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnenaccess.gif\" alt=\"sonnenBatterie access\" width=\"898\" height=\"64\" \/><\/p>\n<p>But there&#8217;s nothing there about letting them come between the emotional bond you share with your battery.<\/p>\n<h2>The SonnenFlat Rate Is Very Flat<\/h2>\n<p>Sonnenflat lives up to its name as the rate you are charged is very flat and the same across Australia for the three plans.\u00a0 The monthly charge, no matter where you are, is:<\/p>\n<ul>\n<li>Economy: $46.20<\/li>\n<li>Family: $57.20<\/li>\n<li>Autonomy: $68.20<\/li>\n<\/ul>\n<p>Sonnen has the power to change what they charge, either up or down, with notice.<\/p>\n<h2>Excess Usage Rate<\/h2>\n<p>If you exceed your Annual Usage Allowance you will be charged for every extra kilowatt-hour you consume.\u00a0 The Excess Usage Rate varies according to location and can be higher or lower than what&#8217;s available from the grid.\u00a0 Below I&#8217;ve compared the Excess Usage Rate to the lowest cost grid electricity available:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-25119 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/usage-rates.jpg\" alt=\"sonnenflat excess electricity usage vs market\" width=\"542\" height=\"629\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/usage-rates.jpg 542w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/usage-rates-259x300.jpg 259w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/p>\n<ul>\n<li>South Australia:\u00a0 38 cents vs. 33.5 cents &#8212; grid is 12% less<\/li>\n<li>Sydney, Endeavour Network:\u00a0 23.5 cents vs 22.1 &#8212; grid is 6% less<\/li>\n<li>Tasmania\u00a0 26.4 cents vs 26.4 cents<\/li>\n<li>South East Queensland 24.6 cents vs. 25 cents &#8212; grid is 3% more expensive<\/li>\n<li>ACT\u00a0 21.3\u00a0cents vs. 23.1\u00a0cents &#8212; grid is 8% more expensive<\/li>\n<\/ul>\n<p>I consider it appropriate to use the lowest cost electricity available as a comparison because, as I&#8217;ll soon explain, you don&#8217;t receive a lot of feed-in tariff with sonnenFlat.<\/p>\n<p>Because Sonnen has said you won&#8217;t pay more than the cost of grid electricity for excess electricity use, it may be possible to convince them to lower the Excess Usage Rate it if you can show grid electricity is available for less.<\/p>\n<h2>Solar System Size And Minimum Annual Generation<\/h2>\n<p>The three sonnenFlat plans all have a minimum solar system size that is the same no matter the location:<\/p>\n<ul>\n<li>Economy: 5 kilowatts<\/li>\n<li>Family: 7.5 kilowatts<\/li>\n<li>Autonomy: 10 kilowatts<\/li>\n<\/ul>\n<p>There is also a Minimum Annual Generation amount.\u00a0 If your solar power system doesn&#8217;t produce at least that many kilowatt-hours you won&#8217;t qualify.\u00a0 These are dependent on location and for South Australia they are:<\/p>\n<ul>\n<li>Economy: 6,515 kilowatt-hours<\/li>\n<li>Family: 9,198 kilowatt-hours<\/li>\n<li>Autonomy: 12,264 kilowatt-hours<\/li>\n<\/ul>\n<p>In South Australia a minimum sized system should be sufficient whether the <a href=\"https:\/\/www.solarquotes.com.au\/panels\/direction\/\">solar panels face<\/a> east, west, or north as long as there is no significant shading.\u00a0 But in Tasmania only minimum sized systems that face north and are unshaded are likely to exceed the Minimum Annual Generation amount.<\/p>\n<h2>You Must Exceed Annual Export Threshold To Receive Feed-In Tariff<\/h2>\n<p>When you have sonnenFlat you won&#8217;t receive any <a href=\"https:\/\/www.solarquotes.com.au\/systems\/feed-in-tariffs\/\">solar feed-in tariff<\/a> for solar electricity sent into the grid until it exceeds the Annual Export Threshold.\u00a0 This varies according to location and plan and for South Australia the amounts are:<\/p>\n<ul>\n<li>Economy: 1,305 kilowatt-hours<\/li>\n<li>Family: 1,840 kilowatt-hours<\/li>\n<li>Autonomy: 2,453 kilowatt-hours<\/li>\n<\/ul>\n<p>A north facing <a href=\"https:\/\/www.solarquotes.com.au\/systems\/5kw\/\">5 kilowatt solar system<\/a> in Adelaide can easily produce 7,300 kilowatt-hours a year.\u00a0 A typical household will export about 75% of that, which comes to 5,475 kilowatt-hours.\u00a0 This makes it look easy to exceed the Annual Export Threshold, but having a battery changes this.\u00a0 If the household uses 2,000 kilowatt-hours of battery storage a year with a round trip efficiency of 86%<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sonnenflat-review\/#en-24813-1' id='enref-24813-1' onclick='return hhEndnotes_show(24813)'>1<\/a><\/sup> then it will have to be charged with 2,326 kilowatt-hours of solar electricity.\u00a0 This will reduce the amount of solar electricity exported down to 3,149 which is only 1,844 kilowatt-hours above the Annual Export Threshold for the Economy sonnenFlat in Adelaide.<\/p>\n<h2>SonnenFlat Feed-In Tariffs Are Low<\/h2>\n<p>The solar feed-in tariff Sonnen will pay you for exported solar electricity over the Annual Export Threshold is not generous \u00a0Below I&#8217;ve compared the sonnenFlat feed-in tariff in different locations to AGL&#8217;s feed-in-tariff.\u00a0 AGL is a large electricity retailer and where they are available I have simply put down the feed-in tariff they offer.\u00a0 Rather than use <a href=\"https:\/\/www.solarquotes.com.au\/blog\/agl-20-cent-feed-in-tariff\/\">AGL&#8217;s 20 cent feed-in tariff<\/a>, which hopefully is still available, I&#8217;ve used the highest feed-in tariff they actively advertise online:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-25120\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-feed-in-tariffs.jpg\" alt=\"Sonnen feed-in-tariffs vs market\" width=\"542\" height=\"637\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-feed-in-tariffs.jpg 542w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sonnen-feed-in-tariffs-255x300.jpg 255w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/p>\n<ul>\n<li>South Australia:\u00a0 7 cents vs. 16.3 cents &#8212; AGL&#8217;s feed-in tariff is 47% higher<\/li>\n<li>NSW:\u00a0 8 cents vs. 11.1 cents &#8212; AGL&#8217;s feed-in tariff is 39% higher<\/li>\n<li>Tasmania\u00a0 8 cents vs. 8.5 &#8212; Aurora&#8217;s feed-in tariff is 7% higher<\/li>\n<li>South East Queensland 9 cents vs. 10.6 cents &#8212; AGL&#8217;s feed-in tariff is 18% higher<\/li>\n<li>ACT\u00a0 7.5 cents vs 11 cents &#8212; AGL&#8217;s feed-in tariff is 47% higher<\/li>\n<\/ul>\n<h2>South Australia SonnenFlat Info<\/h2>\n<p>South Australia is where the most Sonnen battery systems are likely to be sold initially, so I&#8217;ve excised the following section from a sonnenFlat energy price fact sheet to have the information all in one location:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-25084 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/saflatplans.gif\" alt=\"sonnenflat electricity pricing information\" width=\"1181\" height=\"483\" \/><\/p>\n<h2>Sonnen Becomes Your Electricity Retailer And Takes Control Of Your Battery<\/h2>\n<p>When you join sonnenFlat, Sonnen becomes your electricity retailer.\u00a0 They also take control of your battery and use it as part of a Virtual Power Plant, which lets Sonnen make money from buying and selling wholesale electricity and providing services that help stabilise the grid.\u00a0 In return for being able to use your battery in this way Sonnen offers you a flat rate that, hopefully, will save you money:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-25114 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/battcontrol.gif\" alt=\"Sonnen battery virtual power plant\" width=\"965\" height=\"119\" \/><\/p>\n<p>Sonnen promises if they charge the battery with grid power as part of operating their Virtual Power Plant it won&#8217;t be added to your Annual Usage Allowance.\u00a0 You also won&#8217;t be charged for it since you&#8217;re paying a flat rate.\u00a0 However, this will increase the amount of wear and tear on your battery.\u00a0 The good news is the Sonnen battery system is warranted for the first of 10 years or 10,000 cycles and the ability to handle a high number of cycles should mean being part of a Virtual Power Plant won&#8217;t result in a significant deterioration in capacity.\u00a0 The bad news is that Sonnen has never &#8212; as far as I am aware &#8212; provided clear information in Australia on how much we can expect their batteries to deteriorate.<\/p>\n<h2>You Are Not Locked In<\/h2>\n<p>A good thing about sonnenFlat is you are not locked in. You can leave whenever you like and there are no exit fees.\u00a0 However, it can take up to three months to change retailers<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sonnenflat-review\/#en-24813-2' id='enref-24813-2' onclick='return hhEndnotes_show(24813)'>2<\/a><\/sup>.\u00a0 This is a problem that is part of the Australian electricity retail market and not something specific to Sonnen.\u00a0 Note that if you join for three months and burn through your entire annual usage in that time and then leave, I imagine Sonnen would have something to say about that.\u00a0 I suspect you&#8217;d only get 3 months worth of Annual Usage and would be charged the excess rate for the rest.<\/p>\n<p>In the future you may have the option of choosing between between different Virtual Power Plants from lots of electricity retailers and battery manufacturers, so not being locked in is a good thing.<\/p>\n<h2>It Is Possible To Save Money With SonnenFlat<\/h2>\n<p>It is difficult to determine how much a household can potentially save or possibly lose with sonnenFlat, but a reasonable estimate can be made.\u00a0 If an Adelaide home has the following characteristics:<\/p>\n<ul>\n<li>A 5 kilowatt solar system that generates 7,500 kilowatt-hours a year.<\/li>\n<li>A solar electricity self consumption rate of 25% before battery storage is used.<\/li>\n<li>A 10 kilowatt-hour Sonnen battery system with a round trip efficiency of 86%.<\/li>\n<li>7.2 kilowatt-hours of battery storage is used on an average day.<\/li>\n<li>7,000 kilowatt-hours of annual electricity consumption.<\/li>\n<li>The household uses the first AGL retail electricity plan our <a href=\"https:\/\/www.solarquotes.com.au\/energy\/\">comparison tool<\/a> displays, which has a yearly supply charge of $341, a per kilowatt-hour charge of 32.5 cents, and a feed-in tariff of 16.3 cents.<\/li>\n<\/ul>\n<p>In this case the household&#8217;s annual electricity bill would come to $734.\u00a0 If they had instead been on the Economy sonnenFlat plan they would have been charged $46.20 a month, which would come to $554 a year.\u00a0 In addition the household would receive $88 of solar feed-in tariff, reducing their yearly electricity bill down to $466; making them $268 a year better off.<\/p>\n<p>If we lower the household&#8217;s electricity consumption down to 6,000 kilowatt-hours a year while keeping the other assumptions the same, the benefit of using sonnenFlat is reduced but it still comes out ahead.\u00a0 If we instead increase the size of the solar system to <a href=\"https:\/\/www.solarquotes.com.au\/systems\/6kw\/\">6.6 kilowatts<\/a> of north facing solar, then it&#8217;s almost a tie.\u00a0 If the solar power system performs well then the household would be worse off with sonnenFlat.<\/p>\n<h2>Getting A Sonnen Battery May Not Be Worthwhile<\/h2>\n<p>It certainly looks possible for households that meet the requirements to save money by getting sonnenFlat.\u00a0 But this doesn&#8217;t mean it is worthwhile to buy a Sonnen battery just so you can join sonnenFlat.\u00a0 As I point out towards the end of <a href=\"https:\/\/www.solarquotes.com.au\/blog\/sonnen-battery-update-review\/\">this article<\/a>, even with South Australia&#8217;s large battery subsidy a Sonnen system is unlikely to pay for itself.\u00a0 So while sonnenFlat can be worthwhile if you already have a Sonnen battery, its advantages may not be enough to make it worthwhile to invest in a battery, especially after the costs of installation are considered.\u00a0 The game may not be worth the candle.<\/p>\n<p><a href=\"https:\/\/www.dictionary.com\/browse\/the-game-is-not-worth-the-candle\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-25123\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/not-worth-candle.png\" alt=\"game not worth cable meaning\" width=\"649\" height=\"184\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/not-worth-candle.png 649w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/not-worth-candle-300x85.png 300w\" sizes=\"(max-width: 649px) 100vw, 649px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Update Feb 2, 2025: Sonnen Flat ended June 2024 and so is no longer available. I think the German home energy storage company, Sonnen, must be having an exciting time in Australia at the moment:<\/p>\n","protected":false},"author":10,"featured_media":0,"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-24813","post","type-post","status-publish","format-standard","hentry","category-battery-storage","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>SonnenFlat Review: Is It A Good Deal? - SolarQuotes Blog<\/title>\n<meta name=\"description\" content=\"SonnenFlat promises Sonnen battery owners one flat rate for all their electricity. We review sonnenFlat details to work out if it&#039;s a good deal or just hype\" \/>\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\/sonnenflat-review\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SonnenFlat Review: Is It A Good Deal?\" \/>\n<meta property=\"og:description\" content=\"SonnenFlat promises Sonnen battery owners one flat rate for all their electricity. 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Sonnen was the first manufacturer eligible to participate in South Australia's Home Battery Scheme, which will see 40,000 households provided a grant of up to\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":"Sonnen battery installation training","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/11\/sonnen-battery-tafe.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/11\/sonnen-battery-tafe.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/11\/sonnen-battery-tafe.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/11\/sonnen-battery-tafe.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":56453,"url":"https:\/\/www.solarquotes.com.au\/blog\/sonnen-evo-battery-review\/","url_meta":{"origin":24813,"position":4},"title":"sonnenBatterie Evo. Finally! A Decent Battery From sonnen.","author":"Ronald Brakels","date":"December 3, 2021","format":false,"excerpt":"Just the other day, Finn was having a whinge about sonnen batteries.\u00a0 He mentioned a few problems the current sonnenBatterie Eco has: You can't install it outside without a protective cabinet. Its power output is low compared to similar-sized batteries. Backup power is an expensive optional extra. Even with the\u2026","rel":"","context":"In &quot;Battery Storage&quot;","block_context":{"text":"Battery Storage","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/battery-storage\/"},"img":{"alt_text":"sonnenbatterie EVO or sonnen Evo battery review","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/12\/sonnenbatterie-evo.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/12\/sonnenbatterie-evo.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/12\/sonnenbatterie-evo.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/12\/sonnenbatterie-evo.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/12\/sonnenbatterie-evo.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":5494,"url":"https:\/\/www.solarquotes.com.au\/blog\/sonnen-battery-storage\/","url_meta":{"origin":24813,"position":5},"title":"Sonnen battery storage enters the Oz market, company announces peer-to-peer trading","author":"Staff Writer","date":"April 4, 2016","format":false,"excerpt":"The surge of popularity of solar and storage in Oz has triggered a battery storage invasion as companies are keen to test our country as an ideal market. The most recent of these announcements comes from German clean energy company Sonnen.\u00a0 Sonnen chief marketing officer Philipp Schroder emphasised the affordability\u2026","rel":"","context":"In &quot;Battery Storage&quot;","block_context":{"text":"Battery Storage","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/battery-storage\/"},"img":{"alt_text":"sonnen-battery-storage","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/sonnen-battery-storage.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/sonnen-battery-storage.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/sonnen-battery-storage.jpg?resize=525%2C300 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/24813","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=24813"}],"version-history":[{"count":71,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/24813\/revisions"}],"predecessor-version":[{"id":89232,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/24813\/revisions\/89232"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=24813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=24813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=24813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}