{"id":27982,"date":"2026-11-09T17:38:46","date_gmt":"2026-11-09T17:38:46","guid":{"rendered":"https:\/\/tradefoxapp.com\/?page_id=27982"},"modified":"2026-11-10T00:00:16","modified_gmt":"2026-11-10T00:00:16","slug":"ev-solar-batteries-and-heat-pumps","status":"publish","type":"page","link":"https:\/\/tradefoxapp.com\/fr\/bs-7671\/ev-solar-batteries-and-heat-pumps\/","title":{"rendered":"EV charging, solar PV, batteries and heat pumps under BS 7671 A4"},"content":{"rendered":"\n<style>\n.tfg-page{--fg:#1d1d1f;--fg2:#6e6e73;--line:#d2d2d7;--soft:#f5f5f7;--brand:#F15927;--brand-ink:#C2410C;font-family:-apple-system,BlinkMacSystemFont,\"SF Pro Text\",\"SF Pro Display\",\"Helvetica Neue\",Helvetica,Arial,sans-serif!important;color:var(--fg);-webkit-font-smoothing:antialiased;font-size:19px;line-height:1.58;letter-spacing:-.012em;text-align:left;background:#fff}\n.tfg-page *,.tfg-page *::before,.tfg-page *::after{box-sizing:border-box}\n.tfg-page h1,.tfg-page h2,.tfg-page h3,.tfg-page 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.tfg-card{display:flex;flex-direction:column;gap:6px;background:var(--soft);border-radius:18px;padding:24px;color:var(--fg);min-height:170px;transition:transform .3s}\n.tfg-page .tfg-card:hover{text-decoration:none;transform:scale(1.015)}\n.tfg-card .n{font-size:13px;font-weight:600;color:var(--brand-ink)}\n.tfg-card .t{font-size:22px;font-weight:600;line-height:1.2}\n.tfg-card .d{font-size:15px;color:var(--fg2);margin-top:auto}\n@media (max-width:734px){.tfg-page{font-size:17px}.tfg-page .tfg h1{font-size:34px}.tfg-page .tfg-lede{font-size:20px}.tfg-page .tfg h2{font-size:26px;margin-top:44px}.tfg-page .tfg-hub h1{font-size:38px}\n.tfg-local-in{flex-direction:column;align-items:flex-start;gap:4px;padding:8px 16px}.tfg-page .tfg-local-title{font-size:17px}.tfg-local-links{width:100%;gap:16px}\n.tfg-pager{grid-template-columns:1fr 1fr}.tfg-pager .tfg-all{grid-column:1\/-1;grid-row:1;text-align:center}.tfg-page .tfg-brief{padding:22px 22px 8px}}\n\n<\/style>\n<div class=\"tfg-page\"><nav class=\"tfg-local\" aria-label=\"BS 7671 guide\"><div class=\"tfg-local-in\"><a class=\"tfg-local-title\" href=\"https:\/\/tradefoxapp.com\/bs-7671\/\">BS 7671 Guide<\/a><div class=\"tfg-local-links\"><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/amendment-4\/\">What&#x27;s new in Amendment 4<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/before-you-start\/\">Before you start<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/protection-against-electric-shock\/\">Electric shock<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/fire-arc-fault-and-surge\/\">Fire, arc and surge<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/cable-selection-and-sizing\/\">Cable sizing<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/earthing-and-bonding\/\">Earthing and bonding<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/special-locations\/\">Special locations<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/ev-solar-batteries-and-heat-pumps\/\" aria-current=\"page\">EV, solar and batteries<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/inspection-and-testing\/\">Inspection and testing<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/certificates-and-eicr-codes\/\">Certificates and codes<\/a><a href=\"https:\/\/tradefoxapp.com\/bs-7671\/quick-reference\/\">Quick reference<\/a><\/div><\/div><\/nav><article class=\"tfg\" data-title=\"EV charging, solar PV, batteries and heat pumps under BS 7671 A4\" data-desc=\"EV charge points, solar PV, home batteries and heat pumps under BS 7671:2018+A4:2026: PME options, RCD types, Chapter 57, multiple sources and DNO notification.\" data-slug=\"ev-solar-batteries-and-heat-pumps\">\n  <p class=\"tfg-eyebrow\">BS 7671 Guide \u00b7 Section 8<\/p>\n  <h1>EV charging, solar PV, batteries and heat pumps<\/h1>\n  <p class=\"tfg-lede\">Low-carbon kit turns a simple one-way supply into a busy two-way system. Here is what BS 7671:2018+A4:2026 expects when you add a charger, panels, a battery or a heat pump, and what to check before you start.<\/p>\n\n  <aside class=\"tfg-brief\"><h2>In brief<\/h2><ul>\n    <li>Every EV charge point gets its own final circuit and its own RCD of 30 mA or less, plus DC fault protection somewhere in the chain.<\/li>\n    <li>A PME earth can only serve a charge point used outdoors if one of the open-PEN measures in Regulation 722.411.4.1 is in place.<\/li>\n    <li>A4 confirms that EV charger circuits built to BS EN 61851 don&#8217;t need an AFDD (722.421.1.7.201).<\/li>\n    <li>New Chapter 57 covers stationary batteries. In dwellings, site them in line with PAS 63100 and pick the RCD type to suit the battery inverter (PCE).<\/li>\n    <li>Batteries now count as generating sets, not loads. Use bidirectional protective devices wherever current can flow both ways.<\/li>\n    <li>Check supply capacity first and tell the network operator. Some jobs are connect-and-notify. Others need approval before you connect.<\/li>\n  <\/ul><\/aside>\n\n  <h2>Start with the supply, not the kit<\/h2>\n  <p>Every one of these jobs adds load, adds a source, or both. Before you quote, work out the new maximum demand and compare it with the cut-out fuse, tails and consumer unit. Regulation 132.16 won&#8217;t let you add to an installation unless the existing equipment, including the distributor&#8217;s, can take it.<\/p>\n  <p>Don&#8217;t apply diversity to a heat pump or charge point. Both run flat out for hours, often together on a cold evening. If the numbers don&#8217;t fit, the options are a supply upgrade or load management that genuinely limits demand.<\/p>\n  <div class=\"tfg-note\"><strong>On site:<\/strong> Look at the cut-out before you promise anything. A cracked or scorched cut-out, a looped service or an unknown fuse rating all mean a call to the DNO before any new load goes on.<\/div>\n  <p class=\"tfg-reg\">Regulation references: 132.16, 311.1, 433.1<\/p>\n\n  <h2>EV charging: Section 722<\/h2>\n  <h3>A circuit of its own<\/h3>\n  <p>Each charge point needs its own dedicated final circuit. You can&#8217;t use diversity on a final circuit serving a charger, because the design assumes it draws its full rated current. Diversity is allowed on a distribution circuit feeding several chargers, but only where load control is fitted to hold total demand down.<\/p>\n\n  <h3>RCDs and DC faults<\/h3>\n  <p>Each charging point must have its own RCD with a rated residual operating current of no more than 30 mA. Type AC isn&#8217;t acceptable. The RCD can sit in the board or inside the charger, so read the data sheet before you buy a board-mounted device you don&#8217;t need.<\/p>\n  <p>A vehicle&#8217;s onboard charger can leak smooth DC fault current, which can stop an ordinary RCD tripping. So you also need DC fault protection, either:<\/p>\n  <ul>\n    <li>a Type B RCD, or<\/li>\n    <li>a Type A or Type F RCD together with a residual direct current detecting device (RDC-DD) to BS IEC 62955, which is usually built into the charger.<\/li>\n  <\/ul>\n  <p>Check upstream too. Under Regulation 531.3.3, DC leakage passed by a downstream device must not blind the RCD above it: no Type AC or Type A above a Type B, for example. If the board has a Type AC main RCD, feed the charger from outside it.<\/p>\n\n  <h3>PME and the open-PEN problem<\/h3>\n  <p>On PME, neutral and earth share one conductor in the network. If that PEN breaks, exposed metalwork can rise towards line voltage. A car on wet ground outside, with someone touching the bodywork, is the worst case.<\/p>\n  <p>So Regulation 722.411.4.1 says a PME earthing facility must not be used for a charge point that serves, or could reasonably serve, a vehicle outdoors unless one of these measures is used:<\/p>\n  <table class=\"tfg-table\">\n    <thead><tr><th>Option<\/th><th>How it works<\/th><th>Points to watch<\/th><\/tr><\/thead>\n    <tbody>\n      <tr><td>Extra earth electrode<\/td><td>An installation electrode is connected to the MET, with a resistance low enough to hold the MET within 70 V of true earth if the PEN opens.<\/td><td>Needs a calculation (see the annex to Section 722) and an electrode that can actually achieve it. Often impractical on a typical house load.<\/td><\/tr>\n      <tr><td>Open-PEN device (70 V)<\/td><td>Disconnects line, neutral and earth within 5 s if the protective conductor rises more than 70 V above true earth.<\/td><td>Needs an earth reference: an electrode or a reference derived from three phases.<\/td><\/tr>\n      <tr><td>Open-PEN device (voltage window)<\/td><td>Disconnects all conductors, earth included, within 5 s if line-neutral voltage at the charger goes above 253 V or below 207 V.<\/td><td>Most common in domestic chargers. Must provide isolation and not reset until voltage is back in range.<\/td><\/tr>\n      <tr><td>Equivalent device<\/td><td>Any other method that gives at least the same level of safety.<\/td><td>Get the manufacturer&#8217;s evidence in writing.<\/td><\/tr>\n    <\/tbody>\n  <\/table>\n  <p>The older balanced three-phase option was deleted by A2, so don&#8217;t rely on it. The other route is not to use the PME earth for the charger at all: make the charge point circuit TT, with its own electrode and RCD fault protection, and keep that electrode clear of buried metal tied to the PME earth. Check the list of options in the current edition before you design.<\/p>\n  <div class=\"tfg-warn\"><strong>Watch out:<\/strong> The 207 V lower limit catches out long runs. A 5% voltage drop on a supply already near the bottom of its tolerance can push the charger under 207 V and trip it repeatedly. Aim for a much lower drop on the charger circuit, around 3% or less, and upsize the cable if needed.<\/div>\n\n  <h3>AFDDs and load management<\/h3>\n  <p>A4 adds Regulation 722.421.1.7.201. Circuits feeding EV charging equipment built to the BS EN 61851 series, with sockets or connectors to BS EN IEC 62196-2, don&#8217;t need an AFDD. That applies even in buildings where 421.1.7 would otherwise require one, such as HMOs or high-rise residential blocks.<\/p>\n  <p>Many chargers read whole-house current through a CT clamp and throttle back to stay under the fuse rating. That&#8217;s a legitimate way onto a tight supply. Record the setting, test it, and tell the DNO.<\/p>\n  <p class=\"tfg-reg\">Regulation references: 722.411.4.1, 722.421.1.7.201, 722.531.3.101, 531.3.3<\/p>\n\n  <h2>Solar PV: Section 712<\/h2>\n  <p>The biggest difference with PV is that you can&#8217;t switch the DC side off. Panels make voltage whenever there is daylight, so treat the array cabling as live at all times.<\/p>\n  <ul>\n    <li><strong>Isolation:<\/strong> provide it on both the DC and AC sides of the inverter. If the DC switch is built in, check its rating against the string.<\/li>\n    <li><strong>DC shock protection:<\/strong> string fault currents are too small to trip overcurrent devices, so double or reinforced insulation is the normal measure.<\/li>\n    <li><strong>AC connection:<\/strong> a dedicated circuit, sized from the inverter&#8217;s maximum AC output current.<\/li>\n    <li><strong>RCD type:<\/strong> Type B, unless the inverter gives at least simple separation between DC and AC, or its manufacturer says Type B isn&#8217;t needed.<\/li>\n    <li><strong>Surge protection:<\/strong> if Section 443 calls for SPDs on the AC side, protect the DC side too.<\/li>\n    <li><strong>Labels:<\/strong> dual-supply warnings at the origin, meter, consumer unit and every isolation point. The main switch no longer makes the installation dead.<\/li>\n  <\/ul>\n  <p>For more on surge risk assessment, see <a href=\"https:\/\/tradefoxapp.com\/bs-7671\/fire-arc-fault-and-surge\/\">Fire, arc faults and surge protection<\/a>.<\/p>\n  <p class=\"tfg-reg\">Regulation references: 712.537, 712.443, 712.534, 514.15.1<\/p>\n\n  <h2>Batteries: new Chapter 57<\/h2>\n  <p>A4 adds Chapter 57 for stationary secondary batteries used to store energy and supply an installation. Its scope excludes batteries inside products that have their own safety standard, such as a plug-in UPS. It also excludes central battery systems, fire alarm systems to BS 5839 and emergency lighting to BS 5266.<\/p>\n  <p>It covers selection of the battery, the power conversion equipment (<abbr title=\"power conversion equipment\">PCE<\/abbr>, usually the inverter) and the electrical energy management system (<abbr title=\"electrical energy management system\">EEMS<\/abbr>). It also covers earthing, shock protection including RCD-based automatic disconnection, fault protection on the DC side (where battery fault currents can be very high), isolation for maintenance, and warning notices.<\/p>\n  <h3>Batteries in homes<\/h3>\n  <p>In dwellings, A4 points you to PAS 63100 for location and fire safety: keep batteries out of rooms where people sleep, escape routes, lofts and voids, and provide fire detection where they sit. Elsewhere, location follows the premises&#8217; fire risk assessment.<\/p>\n  <p>For the RCD in front of the battery PCE, take the same approach as PV: plan on Type B unless the PCE gives at least simple separation between its AC and DC sides, or its manufacturer says Type B isn&#8217;t needed. Confirm against Chapter 57 and the PCE instructions, and keep the manufacturer&#8217;s statement on file.<\/p>\n  <div class=\"tfg-note\"><strong>On site:<\/strong> Use our <a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/battery-nominal-and-usable-energy\/\">battery energy calculator<\/a> to check usable capacity against what the customer was sold. A depth-of-discharge limit often knocks a fifth or more off the headline figure.<\/div>\n  <p class=\"tfg-reg\">Regulation references: Chapter 57, 110.1.1<\/p>\n\n  <h2>More than one source: Regulation 551.7<\/h2>\n  <p>With PV, a battery or a vehicle-to-grid charger, current reaches the consumer unit from more than one direction. A4 redrafted Regulation 551.7 to deal with this.<\/p>\n  <ul>\n    <li><strong>Batteries are generators.<\/strong> Regulation 551.7.2.1 treats a stationary battery as a generating set, not a load.<\/li>\n    <li><strong>Bidirectional devices.<\/strong> Where energy can flow both ways through a protective device, it must suit that (551.7.1 and 530.3.201). Devices marked &#8220;line\/load&#8221;, &#8220;in\/out&#8221; or with arrows are unidirectional and may not protect properly fed backwards.<\/li>\n    <li><strong>RCDs and sources.<\/strong> 551.7.1 now restricts connecting a source on the load side of an RCD in certain conditions. Read them before putting an inverter downstream of a shared RCD.<\/li>\n    <li><strong>Consumer unit rating.<\/strong> Regulation 551.7.2.2 makes you show the assembly can carry grid and generator current together. The simplest route is rating it for the sum: a 100 A supply plus a 16 A inverter means a 116 A board, unless another permitted route such as load limiting applies.<\/li>\n  <\/ul>\n  <p>The prosumer chapter (Chapter 82, added in Amendment 2) sets out wider design considerations for installations that both make and use electricity, including load shifting, island operation and energy management. The IET&#8217;s <em>Guide to Prosumer Electrical Installations<\/em> expands on it.<\/p>\n  <div class=\"tfg-warn\"><strong>Watch out:<\/strong> A battery offering backup in a power cut must separate from the grid first. Check the changeover equipment does this, and that the island still has a working earth.<\/div>\n  <p class=\"tfg-reg\">Regulation references: 530.3.201, 551.7.1, 551.7.2.1, 551.7.2.2<\/p>\n\n  <h2>Heat pumps<\/h2>\n  <p>BS 7671 has no special section for heat pumps. They are fixed loads under the general rules, so the work is in the design:<\/p>\n  <ul>\n    <li>Size the circuit from the manufacturer&#8217;s maximum running current, not the heat output.<\/li>\n    <li>Add any immersion or backup heater to maximum demand. It may run alongside the compressor.<\/li>\n    <li>Fit the local isolator the manufacturer specifies, and pick a device curve that rides through compressor start-up.<\/li>\n  <\/ul>\n\n  <h2>Telling the network operator<\/h2>\n  <p>The DNO needs to know about every heat pump, charge point and generator. The Energy Networks Association runs a shared process for heat pumps and EV chargers:<\/p>\n  <ul>\n    <li><strong>Connect and notify:<\/strong> for a single new heat pump or charger, where the cut-out is in good order and its rating is known, the supply isn&#8217;t looped, and maximum demand stays below the cut-out rating and within the published limits (broadly 60 A per phase). A heat pump also needs a total system demand of 32 A or less and a connect-and-notify listing in the ENA heat pump database. Notify within 28 days.<\/li>\n    <li><strong>Apply to connect:<\/strong> anything outside those limits needs DNO approval before you connect.<\/li>\n    <li><strong>Generation and storage:<\/strong> type-tested inverters up to 16 A per phase connect under EREC G98 with notification after commissioning. Larger systems need G99 approval first. G100 covers export-limiting schemes where a battery or inverter is set to cap what goes back to the grid.<\/li>\n  <\/ul>\n  <p>Criteria and forms change, so check the current ENA and DNO versions on every job.<\/p>\n  <p class=\"tfg-reg\">Related: <a href=\"https:\/\/tradefoxapp.com\/bs-7671\/protection-against-electric-shock\/\">Protection against electric shock<\/a> \u00b7 <a href=\"https:\/\/tradefoxapp.com\/bs-7671\/earthing-and-bonding\/\">Earthing and bonding<\/a> \u00b7 <a href=\"https:\/\/tradefoxapp.com\/bs-7671\/inspection-and-testing\/\">Inspection and testing<\/a><\/p>\n\n  <aside class=\"tfg-tools\"><h2>Tradefox tools<\/h2><ul>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/maximum-demand-with-an-agreed-coincidence-factor\/\">Maximum demand with an agreed coincidence factor<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/design-current-from-electrical-input-power\/\">Design current from electrical input power<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/voltage-drop-as-a-percentage\/\">Voltage drop as a percentage<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/tt-resistance-and-residual-current-relationship\/\">TT resistance and residual-current relationship<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/electrical\/battery-nominal-and-usable-energy\/\">Battery nominal and usable energy<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/calculators\/gas-plumbing\/#\/cop\">Heat-pump COP<\/a><\/li>\n    <li><a href=\"https:\/\/tradefoxapp.com\/courses\/\">Tradefox courses<\/a><\/li>\n  <\/ul><\/aside>\n<\/article><nav class=\"tfg-pager\" aria-label=\"Guide sections\"><a class=\"tfg-prev\" href=\"https:\/\/tradefoxapp.com\/bs-7671\/special-locations\/\"><span>Previous<\/span>\u2039 Special locations<\/a><a class=\"tfg-all\" href=\"https:\/\/tradefoxapp.com\/bs-7671\/\">All sections<\/a><a class=\"tfg-next\" href=\"https:\/\/tradefoxapp.com\/bs-7671\/inspection-and-testing\/\"><span>Next<\/span>Inspection and testing \u203a<\/a><\/nav><div class=\"tfg-legal\"><p><strong>Important.<\/strong> This guide is written by Tradefox to help qualified electricians understand BS 7671:2018+A4:2026. It is a plain-English summary for learning and reference only. It is not the standard, it does not reproduce it, and it is not professional advice. Always work to the current edition of BS 7671, the IET guidance notes, manufacturers\u2019 instructions, Building Regulations and your scheme provider\u2019s requirements. Electrical work must be carried out by a competent person.<\/p><p>To the extent permitted by law, Tradefox accepts no liability for loss or damage arising from use of this guide. BS 7671 is published by the IET and BSI; Tradefox is not affiliated with or endorsed by either. See our <a href=\"https:\/\/tradefoxapp.com\/terms-of-use\/\">Terms of Use<\/a>. Spotted something out of date? Email <a href=\"mailto:info@tradefoxapp.com\">info@tradefoxapp.com<\/a>.<\/p><\/div><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"TechArticle\", \"headline\": \"EV charging, solar PV, batteries and heat pumps under BS 7671 A4\", \"description\": \"EV charge points, solar PV, batteries and heat pumps under BS 7671 A4: PME options, RCD types, Chapter 57, multiple sources and DNO notification.\", \"url\": \"https:\/\/tradefoxapp.com\/bs-7671\/ev-solar-batteries-and-heat-pumps\/\", \"inLanguage\": \"en-GB\", \"author\": {\"@type\": \"Organization\", \"name\": \"Tradefox\", \"url\": \"https:\/\/tradefoxapp.com\/\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Tradefox\", \"url\": \"https:\/\/tradefoxapp.com\/\"}, \"datePublished\": \"2026-11-09\", \"dateModified\": \"2026-11-09\", \"about\": {\"@type\": \"Thing\", \"name\": \"BS 7671:2018+A4:2026 IET Wiring Regulations\"}, \"isPartOf\": {\"@type\": \"CreativeWorkSeries\", \"name\": \"Tradefox BS 7671 Guide\", \"url\": \"https:\/\/tradefoxapp.com\/bs-7671\/\"}, \"audience\": {\"@type\": \"Audience\", \"audienceType\": \"Electricians\"}}<\/script><\/div>\n","protected":false},"excerpt":{"rendered":"<p>EV charge points, solar PV, batteries and heat pumps under BS 7671 A4: PME options, RCD types, Chapter 57, multiple sources and DNO notification.<\/p>","protected":false},"author":1,"featured_media":0,"parent":27974,"menu_order":8,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"unboxed","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0,"footnotes":"","_tfcalc_title":"EV Charger, Solar PV and Battery Rules: BS 7671 | Tradefox","_tfcalc_desc":"EV charge points, solar PV, batteries and heat pumps under BS 7671 A4: PME options, RCD types, Chapter 57, multiple sources and DNO notification."},"class_list":["post-27982","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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