{"id":24139,"date":"2018-09-20T16:58:44","date_gmt":"2018-09-20T06:28:44","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=24139"},"modified":"2018-09-25T07:18:22","modified_gmt":"2018-09-24T20:48:22","slug":"sa-battery-subsidy-savings","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/","title":{"rendered":"How To Save Money With The South Australian Home Battery Scheme"},"content":{"rendered":"<div id=\"attachment_24420\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-24420\" class=\"wp-image-24420 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery.jpg\" alt=\"South Australian Home Battery scheme\" width=\"1200\" height=\"628\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery.jpg 1200w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery-300x157.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery-768x402.jpg 768w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery-1024x536.jpg 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><p id=\"caption-attachment-24420\" class=\"wp-caption-text\">Wahey! In SA it is possible to save money with batteries &#8211; thanks to the battery rebate.<\/p><\/div>\n<p>For a long time now Australia has been drawing closer to the day when home batteries will pay for themselves. \u00a0With the announcement of \u00a0South Australia&#8217;s battery subsidy scheme we know that day will soon come &#8212; unless the scheme&#8217;s lack of competition prevents battery prices from falling enough.<!--more--><\/p>\n<p>First I want to give warning to everyone who might be in a rush to buy <a href=\"https:\/\/www.solarquotes.com.au\/battery-storage\/comparison-table\/\">solar batteries<\/a>.\u00a0 Even with the large subsidy from the South Australian government it is still possible to lose money buying home batteries.\u00a0 You are only likely to come out ahead if:<\/p>\n<ul>\n<li>You can buy a battery system at a low cost per kilowatt-hour of storage: typically by buying 10 kilowatt-hours or more.<\/li>\n<li>You have a solar power system with at least 5 kilowatts of panels and usually produce enough surplus solar electricity to fully charge the battery on winter days.\u00a0 If you don&#8217;t have a solar power system I recommend getting <a href=\"https:\/\/www.solarquotes.com.au\/systems\/6kw\/\">6.5 kilowatts<\/a> or more.<\/li>\n<li>Your average overnight electricity consumption each month is greater than the usable storage capacity of the battery.<\/li>\n<li>The battery system lasts well beyond its warranty.<\/li>\n<\/ul>\n<p>Meet these criteria, take a gamble on the system significantly outlasting its warranty, and a subsidised home battery system might save you money. \u00a0Just be aware that the return won&#8217;t be as good as <a href=\"https:\/\/www.solarquotes.com.au\/solar101.html\">rooftop solar<\/a> without batteries, the average return from the Australian share market, or many home energy efficiency improvements.<\/p>\n<p>Because battery sales may be about to take off I&#8217;m going to cover eleven things you need to consider before buying one.\u00a0 Then I&#8217;ll examine how good an investment they are.<\/p>\n<h2>Major Details Of The Battery Subsidy<\/h2>\n<p>While we still don&#8217;t have a full picture of <a href=\"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-rebate-information\/\">South Australia&#8217;s battery subsidy<\/a>, the main points are:<\/p>\n<ul>\n<li>The subsidy will be $500 per kilowatt-hour of storage or $600 per kilowatt-hour for pensioners and people receiving most Centrelink payments.<\/li>\n<li>The maximum subsidy for any household is $6,000 and the minimum size is 2.5 kilowatt-hours.<\/li>\n<li>It starts in October[1.\u00a0<em>Update 9:57 am 21st Sept: The SA battery subsidy scheme apparently starts on the 18th of October.<\/em>] but battery choice will be <strong>very<\/strong> limited until December.<\/li>\n<li>Only &#8216;<a href=\"https:\/\/www.solarquotes.com.au\/blog\/cec-installers-retailers-members\/\">CEC Approved Retailers<\/a>&#8216; are allowed to sell batteries under the scheme. This limits it to 4 South Australian solar companies or about 20 national retailers.<\/li>\n<\/ul>\n<p>I don&#8217;t know why only &#8216;CEC Approved Retailers&#8217; will be able to install subsidised batteries. \u00a0This excludes some of the best solar installation companies in Adelaide. The State Government says it&#8217;s in favour of small business.\u00a0 Perhaps what they actually meant was they are in favour of a small number of businesses.\u00a0 Whatever the reason, as a result there is a lack of competition so we can&#8217;t be certain we will see prices low enough for solar batteries to pay for themselves soon.\u00a0 But we will get there in time as battery prices are <a href=\"https:\/\/electrek.co\/2018\/09\/11\/tesla-100-kwh-battery-cost-investor-gigafactory-1-tour\/\" target=\"_blank\" rel=\"noopener\">falling rapidly<\/a>.<\/p>\n<h2>Home Batteries = More Complicated Than Solar<\/h2>\n<p>The basics of rooftop solar aren&#8217;t too complex.\u00a0 <a href=\"https:\/\/www.solarquotes.com.au\/panels\/\">Solar panels<\/a> turn sunlight into electrical energy and your <a href=\"https:\/\/www.solarquotes.com.au\/inverters\/\">solar inverter<\/a> turns it into the type of current homes use.\u00a0 But when you start to get into the details it is more complex and I&#8217;ve seen plenty of people get confused or tied up in knots through no fault of their own.<\/p>\n<p>But batteries &#8212; they are a whole new level of complex.\u00a0 I&#8217;m here to help you out, but even I&#8217;m finding it difficult to keep everything straight.\u00a0 Working out whether or not a solar battery is likely to save you money is no easy task.\u00a0 Here are 11 factors to be considered:<\/p>\n<ol>\n<li>The total installed cost of the battery after subsidy.<\/li>\n<li>The battery&#8217;s usable capacity, which will be less than its total capacity &#8212; with one or two <a href=\"https:\/\/www.solarquotes.com.au\/blog\/redflows-zinc-bromide-zcell-battery-may-have-the-edge-over-lithium-ion\/\">exceptions<\/a>.<\/li>\n<li>The total number of kilowatt-hours of storage you are likely to get out of it over its lifetime before it dies.<\/li>\n<li>The capacity factor you will use it at.\u00a0 If you use most\u00a0of its usable storage capacity each day it may pay for itself.\u00a0 If you only use it at a capacity factor of 50% then even at subsidised prices it&#8217;s unlikely to pay for itself.<\/li>\n<li>Does your solar power system regularly produce enough surplus electricity to fully charge the battery?\u00a0 If you can&#8217;t fully charge it in winter or on cloudy days it will reduce its capacity factor.<\/li>\n<li>What type of electricity tariff are you on and how much do you pay per kilowatt-hour after discounts?<\/li>\n<li>What is your <a href=\"https:\/\/www.solarquotes.com.au\/systems\/feed-in-tariffs\/\">solar feed-in tariff<\/a>?\u00a0 The higher the feed-in tariff the lower the return on your solar system.\u00a0 This does not mean that if your feed-in tariff is low you should get a battery.\u00a0 It means you should get a higher feed-in tariff.<\/li>\n<li>The battery system&#8217;s round trip efficiency.\u00a0 The less energy the battery system wastes the better the return.<\/li>\n<li>Do you need (or want) to pay extra for backup capability so the battery will work during a blackout?<\/li>\n<li>Is your battery virtual power plant compatible?<\/li>\n<li>Do you have better options when it comes to investing your money?<\/li>\n<\/ol>\n<h2>Battery System Cost<\/h2>\n<p>There are a range of different home battery systems on the market.\u00a0 Fortunately we have a <a href=\"https:\/\/www.solarquotes.com.au\/battery-storage\/comparison-table\/\">Battery Comparison Table<\/a> with the details of every home battery system on the market in Australia we&#8217;re aware of.\u00a0 If you look at the prices you&#8217;ll see they range from $1,700 for the 2 kilowatt-hour Soltaro 2 up to $26,000 for the 11.6 kilowatt-hour Sunverge SIS.\u00a0 Most of these prices are estimates of the uninstalled retail price based on information manufacturers and importers have given us, but the Sunverge SIS has one of the few where we&#8217;ve been given the fully installed price.<\/p>\n<h2>Installed Cost<\/h2>\n<p>It would be nice if I could give you a single estimate of how much solar batteries cost to install so you could simply add that to the uninstalled price.\u00a0 Unfortunately, batteries are far too complex for that.\u00a0 There are several different ways to install them and plenty of variation in just how difficult they are to get working.\u00a0 When you are buying a battery what you&#8217;ll need to look at is the total installed price after subsidy.\u00a0 Later I will give an estimated installed price for a system based on prices I have seen advertised.<\/p>\n<h2>Usable Storage Capacity<\/h2>\n<p>Nearly all solar batteries suffer damage\u00a0if they are completely drained.\u00a0 Because of this their usable capacity is less than their nominal capacity.\u00a0 The exception is the Redflow ZCELL, which has no problem at all being sucked dry since it is a zinc bromide battery and not lithium.\u00a0 Unfortunately for lithium batteries both their nominal and usable capacities will decline with use and over time.\u00a0\u00a0 Most batteries warrant they will\u00a0maintain at least 70% of their original capacity but some only promise\u00a060%.\u00a0 So after 9 years a battery that started with 10 kilowatt-hours of usable storage might only have 6.1 usable kilowatt-hours and still be within the terms of its warranty.<\/p>\n<h2>Battery Cycles<\/h2>\n<p>For our purposes a battery cycle occurs when a battery system is fully charged and then its usable capacity is then fully discharged.\u00a0 On average home batteries are cycled less than once per day.\u00a0 If your solar battery becomes part of a virtual power plant this may raise the number of cycles above one.\u00a0 Most battery warranties are for 10 years\u00a0but some cover a set number of cycles instead.\u00a0 For example Sonnen&#8217;s\u00a0warrants its battery systems\u00a0for 10 years or 10,000 cycles &#8212; which. ever comes first.\u00a0 This means you could average 2.7 cycles a day and still not hit 10,000 before the warranty runs out.\u00a0 This is far more than you actually need as most homes use less than one cycle a day.<\/p>\n<h2>Cost Per Warranted Kilowatt-Hour With One Cycle Per Day<\/h2>\n<p>Differences in nominal storage capacity, usable storage capacity, and warranties make it difficult to compare battery systems on price.\u00a0 To simplify things we have included the cost per warranted kilowatt-hour when cycled once per day on our battery comparison table.\u00a0 The result for every battery system on the table is on the\u00a0graph below.\u00a0 It starts at 20 cents per kilowatt-hour for the DCS PV 13.5 and goes all the way to $1.07 for the Hansol AIO 7.2:<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-24408 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/warrantygraph.gif\" alt=\"Solar battery costs per warranted kilowatt-hour\" width=\"1878\" height=\"1106\" \/><\/p>\n<h2>Three Ways To Install Battery Systems<\/h2>\n<p>The three different colours in the chart above represent three types of battery systems:<\/p>\n<ul>\n<li><strong>Orange &#8211; Batteries Only:<\/strong>\u00a0 These systems are batteries in a box &#8212; or sometimes not even a box<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/#en-24139-1' id='enref-24139-1' onclick='return hhEndnotes_show(24139)'>1<\/a><\/sup>.\u00a0 If you already have a solar power system it is unlikely that your inverter is\u00a0a hybrid.\u00a0 The exception to this is <a href=\"https:\/\/www.solarquotes.com.au\/blog\/huawei-solar-inverter-review\/\">Huawei<\/a> whose standard solar inverter is a hybrid.<\/li>\n<li><strong>Dark Red &#8211; Batteries &amp; Battery Inverter:<\/strong>\u00a0 These systems have a built-in battery inverter. \u00a0They work independently of your solar power system so there are no compatibility issues with your current solar inverter.\u00a0 This makes them very convenient for people who already have solar panels.\u00a0 The disadvantage of these systems is that homes in South Australia with single phase power, which is most of them, are now limited to a total of <a href=\"https:\/\/www.solarquotes.com.au\/blog\/sa-power-networks-inverter-limits\/\">5 kilowatts of inverter capacity<\/a> including solar <strong>and<\/strong> battery inverters.\u00a0 It can be possible to get around this with export limiting but this is an extra cost.\u00a0 The most famous &#8212; and lowest cost per kilowatt-hour &#8212; example this type of system is the Tesla Powerwall 2.\u00a0 Unfortunately, according to Tesla, no more Powerwalls will be available until time <a href=\"https:\/\/www.solarquotes.com.au\/blog\/tesla-powerwall-2-delay\/\">early 2019<\/a>.<\/li>\n<li><strong>Blue &#8211; All-In-One:<\/strong>\u00a0 These battery systems are all-in-one units that come with a hybrid inverter that you can directly plug solar panels into. No separate solar inverter required. \u00a0The lowest priced example of this is the Opal Storage 13 kilowatt-hour system which has a 4.6 kilowatt <a href=\"https:\/\/www.solarquotes.com.au\/inverters\/solax-power-review.html\">SolaX inverter<\/a> that can accept up to 6.13 kilowatts of solar panels.<\/li>\n<\/ul>\n<p>If you already have a solar power system, then getting one of the battery systems in dark red on the chart is the simplest option as they retrofit to any existing solar system and you won&#8217;t need to get rid of your existing solar inverter.\u00a0 But this doesn&#8217;t mean you shouldn&#8217;t consider other options.\u00a0 For example, you may consider it worthwhile to replace an old inverter with a new hybrid inverter with a fresh warranty.<\/p>\n<p>If you don&#8217;t have a solar power system<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/#en-24139-2' id='enref-24139-2' onclick='return hhEndnotes_show(24139)'>2<\/a><\/sup>\u00a0then you have nothing to lose by considering all battery system types when working out which is best for you.<\/p>\n<h2>Installed Cost Per Kilowatt-Hour<\/h2>\n<p>It is possible to get battery systems installed for around $1,000 per kilowatt-hour.\u00a0 While not all the installers making these kinds of offers are what I would call reputable, reputable ones are definitely among them.<\/p>\n<p>But looking at wholesale pricing, I don&#8217;t see how it&#8217;s possible to make a sustainable margin installing solar batteries at that price and I don&#8217;t think anyone is.\u00a0 To me it looks like installers are simply positioning themselves in the battery market, discouraging competition, and building up experience and goodwill ready for when batteries take off &#8212; such as when South Australia introduces a massive battery subsidy.\u00a0 I feel bad for those that spent money preparing to become battery installers and are now effectively locked out of the market because they aren&#8217;t one of the few businesses permitted to install subsidised systems.<\/p>\n<p>I&#8217;m sure the approved companies are carefully considering what kind of deals they will offer over the next few months.\u00a0 I hope that we&#8217;ll see similar low prices for systems that attract the subsidy.\u00a0 But if we don&#8217;t see them in the next few months presumably all we&#8217;ll have to do is wait, as solar batteries will continue to fall in price.<\/p>\n<h2>Be Wary When It Comes To Solar &amp; Battery Packages<\/h2>\n<p>While the details aren&#8217;t yet released, it will be possible to get a low-interest loan for the balance of installed battery system price.\u00a0 If you get solar panels installed at the same time it will can be\u00a0covered by the same loan.\u00a0 For this reason, if you need solar too, it makes sense to get a package deal.\u00a0 But be wary of companies who offer a great deal on a battery as cover for charging you too much\u00a0for a solar system.\u00a0 Make sure it&#8217;s not possible to get a good quality solar and battery for a better price by getting them separately.\u00a0 Also watch out for anyone who makes the return from batteries sound better than it is by <a href=\"https:\/\/www.solarquotes.com.au\/blog\/blended-payback\/#enref-11965-1\">blending the payback<\/a> of solar and batteries together.<\/p>\n<h2>Battery Size And Subsidy<\/h2>\n<p>The battery subsidy is $500 per kilowatt-hour of storage or $600 for pensioners and most people who receive Centrelink payments.\u00a0 While it hasn&#8217;t been make clear yet, I am confident this will apply to the nominal capacity and not the usable capacity of battery systems.\u00a0 A battery has to have at least 2.5 kilowatt-hours of capacity to receive the subsidy and the maximum amount of subsidy received for a system is $6,000.\u00a0 So it tops out at 12 kilowatt-hours (or 10 kilowatt-hours for pensioners and Centrelinkers).<\/p>\n<p>Despite this it can make sense to get an even bigger battery &#8212; provided your electricity consumption is high enough.<\/p>\n<h2>Backup Capability<\/h2>\n<p>Not all battery systems work during a blackout.\u00a0 And yes, this does sound dumb.\u00a0 If you want backup capability &#8212; and most people do &#8212; you usually have to pay extra for it.\u00a0 I think many people overrate how useful backup capability is.\u00a0 Rather than explain why here I&#8217;ll just note that when it comes to working out how good an investment subsidised batteries are I&#8217;m not going to bother to place a value on it.\u00a0 But please feel free to add in any value you think is right.\u00a0 Just write it on your screen with a marker pen.\u00a0 Don&#8217;t worry &#8212;\u00a0 you can always liquid paper it out later.<\/p>\n<h2>Capacity Factor<\/h2>\n<p>If you buy a large battery with 13.5 kilowatt-hours of usable storage and then only use 4.5 kilowatt-hours per night, you only use one-third of the battery&#8217;s capacity. Its capacity factor is one-third or 33%.\u00a0 The higher the capacity factor the faster it will pay for itself, but smaller batteries cost more per kilowatt-hour.\u00a0 So it can be more cost-effective to use a larger battery at a capacity factor of 80% and not a smaller battery at a capacity factor of 95%.<\/p>\n<p>Two things that determine a battery&#8217;s capacity factor are:<\/p>\n<ul>\n<li>If the solar system regularly produces enough surplus solar electricity to fully charge the battery.<\/li>\n<li>The household&#8217;s overnight electricity consumption.<\/li>\n<\/ul>\n<h2>Electricity Tariffs And Batteries<\/h2>\n<p>As far as I am aware, South Australia does not have the year round time-of-use tariffs, common in other states, that can improve the economics of batteries.<\/p>\n<p>Demand tariffs are available and these may make sense for batteries.\u00a0 Looking at AGL&#8217;s demand tariff plan, which is the one with the highest feed-in tariff of 16.3 cents, I see that after discounts they charge 31 cents per kilowatt-hour at all times. On top of that you have to pay a demand charge. \u00a0This varies depending on the peak power you hit\u00a0but is a minimum of 31.57 cents a day.\u00a0 It is theoretically possible for a battery system to keep this charge at the minimum by &#8216;lopping the peaks&#8217;. \u00a0But in practice homes with battery systems generally use very little grid electricity, so the low usage rates are likely to have little value.\u00a0 Also, if the battery&#8217;s priority is to maximise self consumption, it may not have enough charge available to lop peaks consistently.\u00a0 For these reasons I will use a standard tariff when considering potential savings from a solar battery system.<\/p>\n<p>The large majority of South Australian homes have a standard tariff which charges a flat rate per kilowatt-hour of grid electricity used.\u00a0 While the amount varies depending one which retail electricity plan a household had, after discounts, it&#8217;s typically around 38 cents.<\/p>\n<h2>Solar Feed-In Tariffs And Batteries<\/h2>\n<p>The higher your solar feed-in tariff the less value a home battery gives.\u00a0 This is because using a kilowatt-hour of stored electricity at night may save you 38 cents, but storing that energy costs you the feed-in tariff that you would have otherwise gained.\u00a0 So if your feed-in tariff was 16.3 cents then with a 100% efficient battery you would only save 21.7 cents per kilowatt-hour of stored electricity you use.\u00a0 That&#8217;s the 38 cent cost of grid electricity minus the 16.3 cent feed-in tariff forgone.\u00a0 Unfortunately, no battery is 100% efficient.<\/p>\n<p>It is possible to get a feed-in tariff of <a href=\"https:\/\/www.solarquotes.com.au\/blog\/agl-20-cent-feed-in-tariff\/\">20 cents from AGL<\/a>.\u00a0 If that is not suitable or becomes unavailable AGL also offers 16.3 cents.\u00a0 If your solar power system produces enough surplus electricity to regularly fully charge a battery then it likely makes sense for you to have a feed-in tariff of 16.3 cents or more.\u00a0 If your feed-in tariff is low it does not mean it makes more economic sense for you to get a battery.\u00a0 It most likely means you should get a higher feed-in tariff.<\/p>\n<h2>Virtual Power Plant Participation<\/h2>\n<p>To receive the subsidy a battery system must be capable of becoming part of a virtual power plant in the future.\u00a0 It is not yet clear how much financial benefit this may give people.\u00a0 It&#8217;s even possible unscrupulous operators will shorten the lives of batteries without providing adequate compensation.\u00a0 Virtual power plants are currently only under trial and you can&#8217;t sign up an independent battery at the moment.\u00a0 (Although you can join <a href=\"https:\/\/www.solarquotes.com.au\/blog\/will-reposit-really-halve-the-payback-time-of-your-battery\/\">Reposit<\/a> if you have a compatible battery.)\u00a0 If virtual power plants make home batteries profitable in the future then the time to let that influence your decision on whether or not to get a solar battery would be in the future.<\/p>\n<h2>Size Your Battery Part #1: How Many kWh Do You Export?<\/h2>\n<p>If your solar system isn&#8217;t regularly producing enough surplus electricity to charge your battery during the cloudiest months of the year you won&#8217;t be able to use it at high capacity.\u00a0 Not unless you charge it from the grid &#8211; and that doesn&#8217;t make economic sense in South Australia at the moment.<\/p>\n<p>If you already have a solar power system it&#8217;s not difficult to estimate how much surplus electricity it generates during the lowest output months of the year: May, June, and July.\u00a0 All you need to do is:<\/p>\n<ol>\n<li>Look through your electricity bills to find the three months in which you earned the least from exports.<\/li>\n<li>Add the number of kilowatt-hours that received a feed-in tariff in those three months and then divide by the total number of days in those months.<\/li>\n<li>This gives you the average daily surplus solar electricity available to charge your battery during the worst three months of the year.<\/li>\n<\/ol>\n<p>If you have a solar system with 5 kilowatts of north facing panels and your electricity consumption is fairly typical, then there&#8217;s a good chance you&#8217;ll find it sent an average of 8.5 kilowatt-hours of electricity into the grid each day over May, June, and July.\u00a0 You may think this means you can install a solar battery with 8.5 kilowatt-hours of usable storage capacity and use it at a high capacity factor over the whole year, but it&#8217;s not that simple.\u00a0 Because of losses that result from charging and discharging it is necessary to put more energy into a battery than you can get out.\u00a0 For this reason it is necessary to look at the round trip efficiency of a battery system.<\/p>\n<div id=\"attachment_24171\" style=\"width: 775px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-24171\" class=\"wp-image-24171 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/efficiency.jpg\" alt=\"Battery round trip efff\" width=\"765\" height=\"521\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/efficiency.jpg 765w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/efficiency-300x204.jpg 300w\" sizes=\"(max-width: 765px) 100vw, 765px\" \/><p id=\"caption-attachment-24171\" class=\"wp-caption-text\">(Image: Lithium Ion Battery Test Centre)<\/p><\/div>\n<p>The chart above shows round trip efficiencies for a variety of brand new battery systems determined by the <a href=\"https:\/\/www.solarquotes.com.au\/blog\/battery-test-centre-results\/\">Canberra Battery Test Centre<\/a>.\u00a0 The result for the SimpliPhi battery may be better than indicated as they found they didn&#8217;t install it correctly.\u00a0 The average round trip efficiency of the lithium batteries is 92%.\u00a0 The Powerwall 2 isn&#8217;t on that chart.\u00a0 Tesla gives its round trip efficiency as 88% but I have access to figures that suggest its actual performance is worse.\u00a0 However, I will wait and see if it improves after its master gets tired of trying to find ways of tricking it into making a mistake.<\/p>\n<p>Because the efficiencies of all solar batteries are likely to get worse over time, I expect lithium batteries will have overall losses of at least 10%. So if your solar power system exports an average of 8.5 kilowatt-hours a day in the lowest output months of the year then your battery&#8217;s usable capacity should be about 90% of that, which is 7.7 kilowatt-hours or less, if you wish to use your battery at high capacity from the start.\u00a0 On the other hand, because the capacity of lithium and most other batteries will decay over time, you may wish to install a solar battery with larger usable capacity to allow for this.\u00a0 I would expect lithium batteries to have lost at least 10% of capacity by the middle of their lifespan.<\/p>\n<p>The Redflow battery on the chart above has the worst efficiency because it uses zinc bromide chemistry instead of lithium.\u00a0 While its efficiency is also expected to decline over time it has the advantage that its storage capacity won&#8217;t.<\/p>\n<h2>Average Solar Exports By System Size<\/h2>\n<p>If you don&#8217;t have solar power yet and are planning to get batteries I suggest installing as much .capacity as you practically can.\u00a0 If you have 3 phase power and a large roof you shouldn&#8217;t have a problem installing enough solar to fully charge a large battery.\u00a0 If you have single phase power as most people do then you have two options:<\/p>\n<ul>\n<li>Install a solar system as close to the normal single phase maximum of 6.66 kilowatts of solar panels as possible.<\/li>\n<li><a href=\"https:\/\/www.solarquotes.com.au\/blog\/sa-power-networks-inverter-limits\/\">Export limit<\/a> your solar power system and install over 6.66 kilowatts of panels, provided you have room on your roof.\u00a0 If you are installing a battery with a battery inverter then you will almost certainly need to export-limit your solar system unless you are happy with both a small solar power system and a small battery<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/#en-24139-3' id='enref-24139-3' onclick='return hhEndnotes_show(24139)'>3<\/a><\/sup>.\u00a0 With export limiting South Australian homes with single phase power can install up to 10 kilowatts of solar plus inverter capacity.<\/li>\n<\/ul>\n<p>Without existing solar you won&#8217;t have a record of how many kilowatt-hours of surplus solar electricity you export, but it can be estimated.\u00a0 Over the three least sunny months of the year the average household with a 6.5 kilowatt solar system that uses electricity for heating is likely to export around 11 kilowatt-hours of surplus solar electricity a day that could instead be used to charge a battery.\u00a0 The amount of surplus electricity will be less if:.<\/p>\n<ul>\n<li>People are usually at home during the day.<\/li>\n<li>Electricity consumption is above average.<\/li>\n<\/ul>\n<p>The amount will tend to be more if:<\/p>\n<ul>\n<li>No one is usually home during the day.<\/li>\n<li>Electricity isn&#8217;t used for heating.<\/li>\n<li>Electricity consumption is below average.<\/li>\n<\/ul>\n<p>So the actual amount could range from over 14 kilowatt-hours to under 8 kilowatt-hours.<\/p>\n<p>If an average home had only 5 kilowatts of solar panels instead of 6.5 then I would expect it to produce an average of around 7.5 kilowatt-hours of surplus electricity per day during the worst months of the year with a range from under 5.5 to over 9.5 kilowatt-hours depending on the household&#8217;s characteristics.<\/p>\n<h2>Size Your Battery Part #2: How Much\u00a0Electricity Do You Use After Dark?<\/h2>\n<p>Assuming you already have solar, knowing how much surplus solar electricity you export determines what size battery you can fully charge most days. \u00a0The next step is to calculate your average overnight electricity consumption to see whether you will drain the battery most nights. To do this you\u00a0should look at your average grid consumption during the months of low grid electricity use.<\/p>\n<p>I recommend looking at your electricity bills for the past 12 months and finding the three months in which you had the lowest grid electricity consumption.\u00a0 Add your grid electricity consumption for those three months and then divide by the total number of days in them.\u00a0 This will give you your average daily grid electricity consumption for those months which will mostly be from a couple of hours before sunset when solar output starts to rapidly fall off to a couple of hours after sunrise when solar electricity output starts to become significant.\u00a0 It will also include some grid electricity use during the day which will mostly occur on cloudy days.<\/p>\n<p>If you don&#8217;t have solar then you can or read your meter at sundown, then again at sunrise. Subtract the two and you&#8217;ll have last night&#8217;s electricity usage.<\/p>\n<p>A typical household with a 6.5 kilowatt solar system may use an average of 7 kilowatt-hours of grid electricity a day during the months of lowest grid electricity consumption.\u00a0 This appears to suggest that if they install a battery system with 7 kilowatt-hours of usable storage they will be able to use it at high capacity.\u00a0 But most household&#8217;s electricity use is quite variable from day-to-day.\u00a0 It&#8217;s common for grid consumption on one day to be 50% higher than average and the next day to be 50% lower than average.\u00a0 So for this reason, to use a solar battery at high capacity through the year its usable storage capacity should be about 75% of the average daily grid electricity consumption for the lowest 3 months.\u00a0 So instead of 7 kilowatt-hours of usable battery storage they should get around 5.25 kilowatt-hours.<\/p>\n<h2>Example Solar Systems &#8212; LG Chem RESUs<\/h2>\n<p>I am going to pick a couple of example solar battery systems and estimate how much their installed cost will be.\u00a0 I&#8217;m not going to put any effort into selecting a battery system.\u00a0 I&#8217;m simply going with the most commonly installed one in Australia which is the <a href=\"https:\/\/www.solarquotes.com.au\/blog\/new-lg-chem-resu-batteries-smaller-powerful-cheaper-powerwall\/\">LG Chem RESU<\/a>.\u00a0 I will consider the RESU6.5 with 5.9 kilowatt-hours of usable storage and the RESU10 with 8.8 kilowatt-hours of usable storage.\u00a0 These will specifically be the lower voltage RESUs, but the results for the RESU10 should be similar to those for the higher voltage RESU10HV.<\/p>\n<p>I am going to assume the pre-subsidy installed cost of the larger RESU will be around $1,000 per nominal kilowatt-hour and will cost $10,000.\u00a0 And I&#8217;ll assume the RESU 6.5 will cost slightly more per nominal kilowatt-hour and will cost $8,000 installed.<\/p>\n<h2>Installed Cost After Subsidy<\/h2>\n<p>With a subsidy of $500 per nominal kilowatt-hour the RESU 6.5 will have an installed cost of $4,750.\u00a0 For pensioners and Centrelinkers\u00a0the subsidy will be $600 per kilowatt-hour and its installed price will be $4,100.<\/p>\n<p>For most households the installed cost of the RESU10 will be $5,100 and for Centrelinkers it will be $4,120.<\/p>\n<h2>Lifetime Kilowatt-Hours Of Storage<\/h2>\n<p>LG Chem RESUs come with a warranty for 10 years or:<\/p>\n<ul>\n<li>20,000 kilowatt-hours throughput for the RESU6.5<\/li>\n<li>30,000 kilowatt-hours throughput for the RESU10<\/li>\n<\/ul>\n<p>Because their usable capacity diminishes over time and because most households are likely to cycle them less than once per day the warranty should last for the full 10 years.\u00a0 If they are cycled once per day at an average of 80% of its usable capacity when new, the amount of time required to reach the energy storage limits given in their warranty would be:<\/p>\n<ul>\n<li>11.6 years for the RESU6.5<\/li>\n<li>11.7 years for the RESU10<\/li>\n<\/ul>\n<p>While the warranty is for a maximum of 10 years it is reasonable to expect the average battery system to last longer than this.\u00a0 But solar batteries are not like refrigerators where they may have a warranty of 2 years but we expect them to last at least 10.\u00a0 Batteries deteriorate with use and over time and survival beyond their warranty period will unfortunately be limited.\u00a0 I&#8217;ll\u00a0be fairly optimistic and assume the average unit will survive for 15 years, which is 50% longer than what its warranty covers.\u00a0 I&#8217;m also going to optimistically assume the hybrid inverter (or battery inverter) will also last for 15 years even though it may only have a warranty of 5 years.\u00a0 While the electronics in inverters don&#8217;t decay in the same certain way the chemicals in batteries do, making no allowance at all for inverter replacement for 15 years is still optimistic.<\/p>\n<h2>Investment Comparison<\/h2>\n<p>There are a number of accounting methods\u00a0to find the rate of return on an investment.\u00a0 While they can be useful in the right circumstances, they do rely on knowing what people&#8217;s cost of capital is, which can vary from person to person and can get very complex.\u00a0 So I am just going to work out how much money in electricity bill savings you will have at the end of a battery system&#8217;s estimated 15 year life.\u00a0 Then I&#8217;ll compare that to what you would have if you invested the money elsewhere.<\/p>\n<h2>Battery Savings Assumptions<\/h2>\n<p>I am using the following assumptions to find the return from our example battery systems.:<\/p>\n<ul>\n<li>The household uses the South Australian average of around 5,000 kilowatt-hours of electricity a year.<\/li>\n<li>It has a 6.5 kilowatt solar power system.<\/li>\n<li>2,000 kilowatt-hours of its electricity use comes from solar and the rest is from the grid.<\/li>\n<li>It exports an average of 11 kilowatt-hours of solar electricity a day during the lowest output 3 months of the year.<\/li>\n<li>It average daily electricity consumption during the 3 lowest output months is 9.5 kilowatt-hours.<\/li>\n<li>The cost of grid electricity after discounts is 38 cents per kilowatt-hour<\/li>\n<li>The solar feed-in tariff is 16.3 cents per kilowatt-hour.<\/li>\n<li>Electricity prices and feed-in tariffs remain constant in real terms.\u00a0 Results are given in today&#8217;s money.<\/li>\n<li>The battery&#8217;s average usable capacity will be 85% of its usable capacity when new.<\/li>\n<li>The battery system&#8217;s average efficiency is 90%.<\/li>\n<\/ul>\n<h2>RESU6.5 Savings<\/h2>\n<p>With the above assumptions the household should have no problem using a RESU6.5 at a high capacity-factor.\u00a0 Because there will still be periods of particularly bad weather when solar electricity output is low and times when overnight electricity consumption is exceptionally low I will assume its capacity factor will be 90%.\u00a0 This means the household will use an average of 4.5 kilowatt-hours of stored electricity per day.\u00a0 With a feed-in tariff of 16.3 cents and 90% round trip efficiency they will have to forgo 18.1 cents in feed-in tariff for each kilowatt-hour of storage they use.\u00a0 This means each kilowatt-hour of storage will save them 19.9 cents on their electricity bills for a daily average of 89.6 cents.\u00a0 Over 15 years the savings will come to $4,910<\/p>\n<h2>RESU10 Savings<\/h2>\n<p>With an average daily electricity consumption of 11.5 kilowatt-hours during low output months the household would be able to use a RESU10 at high capacity.\u00a0 However, the number of days when bad weather would prevent it from being fully charged would be increased.\u00a0 So I will estimate its capacity factor will be 80%.\u00a0 This means they will use an average of 6 kilowatt-hours of storage a day for a daily saving of $1.19.\u00a0 Over 15 years this will save them a total of around $6,540.<\/p>\n<h2>Batteries Vs. Term Deposit<\/h2>\n<p>Now that I&#8217;ve worked out how much the two different sized systems will save on electricity bills I can compare the results to investing the money elsewhere.\u00a0 Because there are 2 system sizes and two subsidy levels &#8212; $500 per kilowatt-hour and $600 per kilowatt-hour &#8212; there are a total of four prices:<\/p>\n<ul>\n<li>RESU6.5 installed for $4,750<\/li>\n<li>RESU6.5 installed for $4,100<\/li>\n<li>RESU10 installed for $5,100<\/li>\n<li>RESU10 installed for $4,120<\/li>\n<\/ul>\n<p>I&#8217;m going to show on a graph how much these amounts would equal in today&#8217;s money if they were invested in a term deposit for 15 years<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-savings\/#en-24139-4' id='enref-24139-4' onclick='return hhEndnotes_show(24139)'>4<\/a><\/sup> and compare them to the savings on electricity bills the batteries give.\u00a0 But to make the comparison fair I am going to assume all the battery savings were also put in a term deposit.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-24418 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/15yearsavings2.jpg\" alt=\"Solar battery savings after 15 years\" width=\"1367\" height=\"686\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/15yearsavings2.jpg 1367w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/15yearsavings2-300x151.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/15yearsavings2-768x385.jpg 768w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/15yearsavings2-1024x514.jpg 1024w\" sizes=\"(max-width: 1367px) 100vw, 1367px\" \/><\/p>\n<p>Looking at the graph we can see the following:<\/p>\n<ul>\n<li>A normal household receiving a $500 per kilowatt-hour subsidy is better off putting their money in a term deposit than getting a RESU6.5.<\/li>\n<li>While household receiving a $600 per kilowatt-hour subsidy is better off with a RESU6.5 than putting the money in a term deposit, getting a RESU10 is clearly a better deal for both subsidy levels.<\/li>\n<\/ul>\n<h2>What Batteries Have To Beat<\/h2>\n<p>I&#8217;ve shown that, with fairly optimistic assumptions, it&#8217;s possible for a household that buys a battery to accumulate more money after 15 years than if they put the money into a term deposit.\u00a0 But there are plenty of people in South Australia who have better things to do with their money than to put it into a term deposit.\u00a0 The first thing I recommend is to get the larger battery.\u00a0 Because of the way the subsidy works there is very little difference in price and it provides a better return:<\/p>\n<ul>\n<li>Households that will receive the $500 per kilowatt-hour subsidy are better off buying a RESU10 if their best alternative is to invest the money at a real interest rate of 3.3% or less.\u00a0 This means getting a solar battery is a better investment than making an extra home loan payment.\u00a0 But if you have a business loan at a real interest rate of 4% it makes more sense to pay that off.<\/li>\n<li>Those receiving the $600 per kilowatt-hour subsidy are better off buying a RESU10 if their best alternative is to invest at a real interest rate of 6.5% or less.\u00a0 So if you had a car loan at 7.5% real interest you&#8217;d be better off paying that off.<\/li>\n<\/ul>\n<p><strong>One thing batteries can&#8217;t beat in South Australia is rooftop solar.\u00a0 Even if you use no solar electricity yourself and send it all into the grid for a feed-in tariff you will still get a better return than from a battery at typical solar installation costs today.\u00a0 <\/strong>So if you are ever considering installing solar and a battery always consider if you would be better off just installing more solar.<\/p>\n<h2>A Word Of Caution<\/h2>\n<p>I&#8217;ve said it&#8217;s possible for subsidised solar batteries to pay for themselves under a specific set of assumptions.\u00a0 But there is no guarantee these assumptions are\u00a0correct and I recommend being more pessimistic than me. I especially recommend pensioners,\u00a0impressed by the extra subsidy they receive, carefully consider if they are likely to save money as their overnight electricity consumption is likely\u00a0lower than average making it difficult for any battery to pay for itself.<\/p>\n<p>If you delay you might lose a little money by not starting to save sooner.\u00a0 But if you dive in quick you might lose a lot.\u00a0 Of course, if you just want a solar battery and don&#8217;t care about the cost, please dive right in.\u00a0 I&#8217;ll be interested to see what happens.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For a long time now Australia has been drawing closer to the day when home batteries will pay for themselves. \u00a0With the announcement of \u00a0South Australia&#8217;s battery subsidy scheme we know that day will soon come &#8212; unless the scheme&#8217;s lack of competition prevents battery prices from falling enough.<\/p>\n","protected":false},"author":10,"featured_media":24420,"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-24139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-battery-storage","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - 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Master of heavily researched deep-dive blog posts, his relentless consumer advocacy has ruffled more than a few manufacturer's feathers over the years. Read Ronald's full bio.","sameAs":["https:\/\/x.com\/BrakelsRonald"],"url":"https:\/\/www.solarquotes.com.au\/blog\/author\/ronald\/"}]}},"jetpack_featured_media_url":"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/save-money-battery.jpg","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2FF2s-6hl","jetpack-related-posts":[{"id":29075,"url":"https:\/\/www.solarquotes.com.au\/blog\/battery-pr-fact-check\/","url_meta":{"origin":24139,"position":0},"title":"Fact Checking An SA Government Press Release Spruiking Their Battery Subsidy","author":"Finn Peacock","date":"March 26, 2019","format":false,"excerpt":"Last Sunday the South Australian State Government issued a press release spruiking its Home Battery Scheme. It is clearly aimed at getting more South Australians to fork over thousands of dollars for a home battery, no doubt triggered by the fact that - at the current run rate - it\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":"press release","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/03\/sa-hbs-press-release.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/03\/sa-hbs-press-release.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/03\/sa-hbs-press-release.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/03\/sa-hbs-press-release.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/03\/sa-hbs-press-release.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":25284,"url":"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-update\/","url_meta":{"origin":24139,"position":1},"title":"Everything You Need To Know About The SA Battery Scheme Now It&#8217;s Up &#038; Running","author":"Ronald Brakels","date":"October 31, 2018","format":false,"excerpt":"When I first wrote about South Australia's battery subsidy not all the details were available to me.\u00a0 But now the Home Battery Scheme website is up and running I still don't have all the details.\u00a0 However -- and this is the important point -- I have more details than I\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":"SA battery scheme update","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sa-battery-update.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sa-battery-update.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sa-battery-update.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sa-battery-update.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/10\/sa-battery-update.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":43050,"url":"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-subsidy-reduction-mb1678\/","url_meta":{"origin":24139,"position":2},"title":"SA Home Solar Battery Subsidy To Be Slashed Again","author":"Michael Bloch","date":"September 10, 2020","format":false,"excerpt":"South Australia's Home Battery Scheme subsidy will soon get another haircut, dropping by $1,000. The Scheme commenced in October 2018 with the aim of financially supporting the installation of\u00a040,000 solar battery systems across the state. Initially the subsidy was set at $500 per kWh for non-energy concession holders and $600\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":"South Australia Home Battery Scheme","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/09\/home-battery-scheme-subsidy.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/09\/home-battery-scheme-subsidy.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/09\/home-battery-scheme-subsidy.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/09\/home-battery-scheme-subsidy.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/09\/home-battery-scheme-subsidy.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":27412,"url":"https:\/\/www.solarquotes.com.au\/blog\/sa-battery-scheme-update-mb0913\/","url_meta":{"origin":24139,"position":3},"title":"SA Home Battery Scheme Grant Update","author":"Michael Bloch","date":"January 25, 2019","format":false,"excerpt":"South Australian Minister for Energy and Mining Dan van Holst Pellekaan has revealed some numbers on uptake of the state's home solar battery grants scheme. SA's Home Battery Scheme offers subsidies of up to $6,000, with the level determined based on storage capacity. 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Start at $500 per\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":"sa battery rebate details","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/09\/sa-battery-rebate.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":26819,"url":"https:\/\/www.solarquotes.com.au\/blog\/sa-home-solar-battery-mb0881\/","url_meta":{"origin":24139,"position":5},"title":"Tesla, LG Chem &#038; Sungrow To Join SA Home Battery Scheme","author":"Michael Bloch","date":"December 31, 2018","format":false,"excerpt":"Tesla, LG Chem and Sungrow will reportedly have solar batteries eligible for South Australia's Home Battery Scheme from today. 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