{"id":92350,"date":"2025-06-02T06:09:10","date_gmt":"2025-06-01T20:39:10","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=92350"},"modified":"2025-10-22T18:12:59","modified_gmt":"2025-10-22T08:42:59","slug":"ev-charger-challenge-mb3193","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/","title":{"rendered":"The Home EV Charger Installation Project From Hell"},"content":{"rendered":"<div class=\"youtube-wrapper\"><iframe title=\"Is This One Of The Toughest Home EV Charger Installs In Australia?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Vzojyrz4UDw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>Many hard-wired home EV charger installations are reasonably straightforward, but others very difficult. This project fell firmly into the latter category. Discover the challenges, approach, outcome \u2014 and the cost.<!--more--><\/p>\n<p>While a plug-in &#8216;granny&#8217; (aka Level 1, brick or mobile connector) charger suits some people, these devices are slow. In this case, the EV owner&#8217;s granny charger would have taken 40 hours to top up his electric car&#8217;s battery from empty. And time can be money; particularly if you&#8217;re on a Time of Use (ToU) tariff. Charging through a peak period can really expensive compared to other periods that can be as cheap as free depending on your electricity retailer&#8217;s plan.<\/p>\n<div id=\"attachment_92352\" style=\"width: 910px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-92352\" class=\"wp-image-92352 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/tou-tariffs.jpg\" alt=\"ToU electricity tariff rates.\" width=\"900\" height=\"435\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/tou-tariffs.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/tou-tariffs-300x145.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/tou-tariffs-768x371.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-92352\" class=\"wp-caption-text\">Example of rates for a Time of Use electricity plan<\/p><\/div>\n<p>A granny charger can also pull 10 Amps \u2014 and in a home with aging wiring (in this case 38 years) when that load is applied for many hours on end, it could result in <a href=\"https:\/\/www.solarquotes.com.au\/blog\/ev-charging-power-outlet\/\">heat related damage<\/a>. Having a hard-wired Level 2 charger with dedicated wiring installed to 2025 standards provides peace of mind, in addition to three times the charging speed in this instance.<\/p>\n<h2>The Installation Scenario<\/h2>\n<ul>\n<li>The home is within a townhouse development.<\/li>\n<li>The charger was to be installed in the garage.<\/li>\n<li>The garage is separated from the home by a backyard covered in pavers.<\/li>\n<li>The home has solar panels. The EV charger needed to communicate with the inverter when the owner just wanted to charge from the solar panels.<\/li>\n<li>There&#8217;s also a home battery \u2014 and what the owner didn&#8217;t want is the home battery dumping all it has stored into the EV battery, leaving nothing for use by the home overnight.<\/li>\n<li>There was a single main breaker board for the entire townhouse development situated away from the owner&#8217;s home. Each townhouse had a 40 Amp breaker. A 7-kilowatt (kW) single-phase EV charger will pull 32 amps, leaving only 8 Amps for the rest of the house. Switching the oven on for example would add another 10 Amp load, meaning the breaker would trip.<\/li>\n<li>The home&#8217;s own switchboard was inside rather than outside.<\/li>\n<\/ul>\n<h2>The Chosen Charger<\/h2>\n<p>The owner already had a <a href=\"https:\/\/www.solarquotes.com.au\/inverters\/solaredge-review.html\">SolarEdge inverter<\/a> and <a href=\"https:\/\/www.solarquotes.com.au\/battery-storage\/reviews\/solaredge-review.html\">SolarEdge home battery<\/a>, so a <a href=\"https:\/\/www.solarquotes.com.au\/ev-chargers\/reviews\/solaredge-review.html\">SolarEdge EV charger<\/a> would be a natural choice as staying within that company&#8217;s ecosystem should make installation and operation simpler. The SolarEdge device offered most of the features the owner wanted including dynamic load management, solar smart charging and the ability to prevent the home battery from emptying into the EV.<\/p>\n<p>But a really important feature was missing \u2014 OCPP support. OCPP stands for Open Charge Point Protocol. This is an independent standard allowing third-party services to communicate with devices supporting it.<\/p>\n<p>The owner uses an electricity retailer called <a href=\"https:\/\/www.solarquotes.com.au\/blog\/12-month-amber-review\/\">Amber Electric<\/a> that connects customers directly to the wholesale electricity market; providing electricity at the same price Amber (and other retailers) pay. Amber customers just pay a membership fee of $22 a month. As Amber&#8217;s electricity prices and feed-in tariff rates vary throughout the day (sometimes very often and wildly), the owner wanted Amber to control his EV charging so he only charges when the price is really cheap or free. That required the charger having OCPP support.<\/p>\n<p>After research, he decided to go with the AC <a href=\"https:\/\/www.solarquotes.com.au\/ev-chargers\/reviews\/sigenergy-review.html\">EV charger from SigEnergy<\/a>, which along with other features he desired, reportedly had a really good OCPP implementation.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-92353\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/sigenergy-ev-charger.jpg\" alt=\"SigEnergy EV Charger\" width=\"900\" height=\"536\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/sigenergy-ev-charger.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/sigenergy-ev-charger-300x179.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/sigenergy-ev-charger-768x457.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<p>With the charger selected and a plan for how the installation would happen, Adelaide installer <a href=\"https:\/\/www.solarquotes.com.au\/installer-review\/dq-electrical-pty-ltd\/\">DQ Electrical<\/a> got to work.<\/p>\n<h2>Installing And Commissioning<\/h2>\n<p>As mentioned, the yard between the house and the garage was paved. The easiest solution would have been stringing conduit along a fence, a couple of walls and down the side of the house. Then the cabling would enter the house through the brick wall, through the first-floor ceiling and into the internal switchboard &#8211; which was another complication given the switchboard of most homes is situated outside.<\/p>\n<p>But rather than putting up conduit along the fence and walls all the way, the tidier approach was to go underground for much of the run. This involved trenching 600 mm deep for the power cable and a data cable that would accompany it.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-92354\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/cable-trenching.jpg\" alt=\"\" width=\"900\" height=\"564\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/cable-trenching.jpg 900w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/cable-trenching-300x188.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/cable-trenching-768x481.jpg 768w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<p>The data cable was necessary for the EV charger&#8217;s dynamic load management features, whereby a sensor installed in the switchboard inside the home measures the amount of current coming into the house.<\/p>\n<p>The sensor communicates with the EV charger via the data cable. The EV charger subtracts the Amps coming into the house from 40 (the breaker limit) and calculates how many it has to play with for the EV. For example, if the house is using 15 Amps, the charger knows it has 25 Amps wiggle room and it sets that as the maximum current. As electricity usage inside the house increases or decreases, the dynamic load management turns the current up or down to suit.<\/p>\n<p>After the necessary digging, drilling, fiddling and a few mishaps, the unit was in and tested. Dynamic load balancing testing was done by turning off the solar and battery and turning on appliances in the house while charging. Success.<\/p>\n<div id=\"attachment_92355\" style=\"width: 901px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-92355\" class=\"wp-image-92355 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/load-balancing.jpg\" alt=\"Testing load balancing\" width=\"891\" height=\"475\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/load-balancing.jpg 891w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/load-balancing-300x160.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/load-balancing-768x409.jpg 768w\" sizes=\"(max-width: 891px) 100vw, 891px\" \/><p id=\"caption-attachment-92355\" class=\"wp-caption-text\">Testing dynamic load balancing<\/p><\/div>\n<h2>Integration With Solar And Battery System<\/h2>\n<p>The final part of commissioning involved getting the EV charger talking to the solar and battery system, and that meant another third-party app called <a href=\"https:\/\/chargehq.net\/\">Charge HQ<\/a>.<\/p>\n<p>While connecting the inverter and battery to Charge HQ was easy, connecting the EV charger wasn&#8217;t \u2014 it required help from Sigenergy behind the scenes.<\/p>\n<p>And that&#8217;s when some further problems began.<\/p>\n<p>The EV charger was refusing to charge when it was in solar-only mode, which was because Charge HQ was fighting the control signal sent from the energy retailer Amber. When Amber signals wholesale electricity prices are zero or negative, this means Amber customers pay if they export solar energy. To prevent this, Amber was throttling the solar to what the house was using and nothing more, so Charge HQ couldn&#8217;t see any surplus solar energy and refused to play ball.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-92356\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/amber-charge-hq.jpg\" alt=\"\" width=\"831\" height=\"542\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/amber-charge-hq.jpg 831w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/amber-charge-hq-300x196.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/amber-charge-hq-768x501.jpg 768w\" sizes=\"(max-width: 831px) 100vw, 831px\" \/><\/p>\n<p>The good news is Charge HQ and Amber are both owned by the same company, and they are working on the issue to handle this specific situation.<\/p>\n<p>That&#8217;s the price of early adoption. And speaking of price &#8230;<\/p>\n<h2>What This Project Cost<\/h2>\n<p>The Sigenergy EV Charger retails for around $1,200 and a standard installation costs an additional $1,000 &#8211; $1,500, which includes running cables and potentially some minor adjustments or upgrades to a switchboard.<\/p>\n<p>But this wasn&#8217;t a standard installation. This project cost around $5,000 all up, with the underground cabling representing approximately $1,500 to $2,000 of the total cost.<\/p>\n<p>If you&#8217;re considering a hard-wired home EV charger, SolarQuotes founder Finn Peacock&#8217;s advice is to have a good think about your needs (such as <a href=\"https:\/\/www.solarquotes.com.au\/ev-chargers\/solar\/\">solar smart charging<\/a> and dynamic load balancing) and the potential challenges of your premises.<\/p>\n<p>If you also have solar panels, a battery and a limited electrical supply, you&#8217;re better off going to a specialist for advice, supply and installation rather than buying a charger online and getting a sparkie to install it; then crossing your fingers and hoping for the best that it all plays together nicely. Having the installer supply the unit can also make life easier if there&#8217;s a warranty claim or other hardware issues down the track.<\/p>\n<p>Learn more in Finn&#8217;s comprehensive <a href=\"https:\/\/www.solarquotes.com.au\/ev-chargers\/\">home EV charging guide<\/a>, and if you&#8217;re looking for a good installer, SolarQuotes <a href=\"https:\/\/www.solarquotes.com.au\/quote\/\">can help there too<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many hard-wired home EV charger installations are reasonably straightforward, but others very difficult. This project fell firmly into the latter category. Discover the challenges, approach, outcome \u2014 and the cost.<\/p>\n","protected":false},"author":17,"featured_media":92358,"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":[788],"tags":[],"class_list":["post-92350","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ev-chargers","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>The Home EV Charger Installation Project From Hell<\/title>\n<meta name=\"description\" content=\"Many home EV charger installations are straightforward. This project was anything but. Discover the challenges, approach, outcome and the cost\" \/>\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\/ev-charger-challenge-mb3193\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Home EV Charger Installation Project From Hell\" \/>\n<meta property=\"og:description\" content=\"Many home EV charger installations are straightforward. This project was anything but. Discover the challenges, approach, outcome and the cost\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/\" \/>\n<meta property=\"og:site_name\" content=\"SolarQuotes Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SolarQuotes\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T20:39:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-22T08:42:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/ev-charger-install.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Michael Bloch\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@solar_quotes\" \/>\n<meta name=\"twitter:site\" content=\"@solar_quotes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/\"},\"author\":{\"name\":\"Michael Bloch\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#\/schema\/person\/66afd571aa00c2e442f0192ebac2f6f1\"},\"headline\":\"The Home EV Charger Installation Project From Hell\",\"datePublished\":\"2025-06-01T20:39:10+00:00\",\"dateModified\":\"2025-10-22T08:42:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/\"},\"wordCount\":1258,\"commentCount\":16,\"publisher\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/ev-charger-install.jpg\",\"articleSection\":[\"EV Chargers\"],\"inLanguage\":\"en-AU\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/\",\"url\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/\",\"name\":\"The Home EV Charger Installation Project From Hell\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/ev-charger-challenge-mb3193\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2025\/06\/ev-charger-install.jpg\",\"datePublished\":\"2025-06-01T20:39:10+00:00\",\"dateModified\":\"2025-10-22T08:42:59+00:00\",\"description\":\"Many home EV charger installations are straightforward. 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