{"id":662,"date":"2026-05-31T20:11:50","date_gmt":"2026-05-31T18:11:50","guid":{"rendered":"https:\/\/e-car.day\/?page_id=662"},"modified":"2026-05-31T20:12:59","modified_gmt":"2026-05-31T18:12:59","slug":"ev-home-electrical-capacity-calculator","status":"publish","type":"page","link":"https:\/\/e-car.day\/?page_id=662","title":{"rendered":"EV Home Electrical Capacity Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"ev-home-power-calc-s17x\">\n\n<div class=\"eco-tool__header\">\n<h2 class=\"eco-tool__title\">EV Home Electrical Capacity Calculator<\/h2>\n\n<p class=\"eco-tool__lead\">\nCheck whether your home&#8217;s electrical service can safely support an EV charger.\n<\/p>\n<\/div>\n\n<form class=\"eco-tool__form\">\n\n<div class=\"eco-tool__grid3\">\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nMain breaker size<br>(amps)\n<\/label>\n\n<input class=\"eco-tool__input\"\nid=\"mainBreaker-s17x\"\ntype=\"number\"\nvalue=\"200\">\n\n<div class=\"eco-tool__hint\">\nMain service panel rating.\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nAverage home load<br>(amps)\n<\/label>\n\n<input class=\"eco-tool__input\"\nid=\"homeLoad-s17x\"\ntype=\"number\"\nvalue=\"60\">\n\n<div class=\"eco-tool__hint\">\nTypical household usage.\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nElectric heating<br>(amps)\n<\/label>\n\n<input class=\"eco-tool__input\"\nid=\"heatingLoad-s17x\"\ntype=\"number\"\nvalue=\"20\">\n\n<div class=\"eco-tool__hint\">\nHeat pumps or electric heaters.\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nAir conditioning<br>(amps)\n<\/label>\n\n<input class=\"eco-tool__input\"\nid=\"acLoad-s17x\"\ntype=\"number\"\nvalue=\"15\">\n\n<div class=\"eco-tool__hint\">\nAir conditioning load.\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nOther major appliances<br>(amps)\n<\/label>\n\n<input class=\"eco-tool__input\"\nid=\"applianceLoad-s17x\"\ntype=\"number\"\nvalue=\"15\">\n\n<div class=\"eco-tool__hint\">\nDryers, ovens, water heaters.\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__field\">\n<label class=\"eco-tool__label\">\nDesired EV charger<br>(amps)\n<\/label>\n\n<select class=\"eco-tool__input\"\nid=\"chargerSize-s17x\">\n\n<option value=\"16\">16A Charger<\/option>\n<option value=\"32\" selected>32A Charger<\/option>\n<option value=\"40\">40A Charger<\/option>\n<option value=\"48\">48A Charger<\/option>\n<option value=\"64\">64A Charger<\/option>\n\n<\/select>\n\n<div class=\"eco-tool__hint\">\nPlanned EV charger size.\n<\/div>\n<\/div>\n\n<\/div>\n\n<div class=\"eco-tool__actions\">\n\n<button type=\"button\"\nclass=\"wp-element-button eco-tool__btn\"\nonclick=\"calcS17x()\">\nCalculate\n<\/button>\n\n<button type=\"button\"\nclass=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\"\nonclick=\"resetS17x()\">\nReset\n<\/button>\n\n<\/div>\n\n<\/form>\n\n<div class=\"eco-tool__result\"\nid=\"result-s17x\"\nhidden>\n\n<h3 class=\"eco-tool__subtitle\">\nResults\n<\/h3>\n\n<div class=\"eco-tool__cards\">\n\n<div class=\"eco-tool__card\">\n<div class=\"eco-tool__metric-label\">\nRemaining Capacity\n<\/div>\n\n<div class=\"eco-tool__metric-value\"\nid=\"capacityResult-s17x\">\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__card\">\n<div class=\"eco-tool__metric-label\">\nSafe Charger Size\n<\/div>\n\n<div class=\"eco-tool__metric-value\"\nid=\"safeResult-s17x\">\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__card\">\n<div class=\"eco-tool__metric-label\">\nOverload Risk\n<\/div>\n\n<div class=\"eco-tool__metric-value\"\nid=\"riskResult-s17x\">\n<\/div>\n<\/div>\n\n<div class=\"eco-tool__card\">\n<div class=\"eco-tool__metric-label\">\nRecommendation\n<\/div>\n\n<div class=\"eco-tool__metric-value\"\nid=\"recommendationResult-s17x\">\n<\/div>\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);padding:16px;border-radius:12px}\n.eco-tool__grid3{display:grid;grid-template-columns:1fr;gap:16px}\n@media(min-width:860px){\n.eco-tool__grid3{grid-template-columns:1fr 1fr 1fr}\n}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px}\n.eco-tool__input{height:44px;padding:0 12px;border-radius:10px;border:1px solid rgba(0,0,0,.2)}\n.eco-tool__hint{font-size:.9em;opacity:.75}\n.eco-tool__actions{display:flex;gap:10px;margin-top:18px}\n.eco-tool__btn{padding:10px 22px}\n.eco-tool__btn--ghost{background:transparent!important;border:1px solid rgba(0,0,0,.2)!important}\n.eco-tool__btn--ghost:hover,.eco-tool__btn--ghost:focus{background:rgba(0,0,0,.06)!important;border-color:rgba(0,0,0,.35)!important}\n.eco-tool__cards{display:grid;gap:10px;margin-top:15px}\n@media(min-width:860px){\n.eco-tool__cards{grid-template-columns:1fr 1fr}\n}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);padding:12px;border-radius:10px}\n.eco-tool__metric-value{font-size:1.6em;font-weight:700}\n<\/style>\n\n<script>\nfunction calcS17x(){\n\nconst breaker =\nparseFloat(document.getElementById('mainBreaker-s17x').value);\n\nconst home =\nparseFloat(document.getElementById('homeLoad-s17x').value);\n\nconst heating =\nparseFloat(document.getElementById('heatingLoad-s17x').value);\n\nconst ac =\nparseFloat(document.getElementById('acLoad-s17x').value);\n\nconst appliances =\nparseFloat(document.getElementById('applianceLoad-s17x').value);\n\nconst charger =\nparseFloat(document.getElementById('chargerSize-s17x').value);\n\nconst currentLoad =\nhome + heating + ac + appliances;\n\nconst available =\nbreaker - currentLoad;\n\nlet risk = \"Low\";\nlet recommendation = \"Current charger size is suitable.\";\n\nif(charger > available){\n\nrisk = \"High\";\nrecommendation =\n\"Upgrade service panel or use a smaller charger.\";\n\n}else if(charger > available * 0.8){\n\nrisk = \"Moderate\";\nrecommendation =\n\"Consider smart load management.\";\n\n}\n\nlet safeCharger = \"16A\";\n\nif(available >= 64) safeCharger = \"64A\";\nelse if(available >= 48) safeCharger = \"48A\";\nelse if(available >= 40) safeCharger = \"40A\";\nelse if(available >= 32) safeCharger = \"32A\";\nelse if(available >= 16) safeCharger = \"16A\";\nelse safeCharger = \"Service Upgrade Needed\";\n\ndocument.getElementById(\"capacityResult-s17x\")\n.innerHTML = available.toFixed(0) + \" A\";\n\ndocument.getElementById(\"safeResult-s17x\")\n.innerHTML = safeCharger;\n\ndocument.getElementById(\"riskResult-s17x\")\n.innerHTML = risk;\n\ndocument.getElementById(\"recommendationResult-s17x\")\n.innerHTML = recommendation;\n\ndocument.getElementById(\"result-s17x\").hidden = false;\n\n}\n\nfunction resetS17x(){\n\ndocument.getElementById(\"mainBreaker-s17x\").value=200;\ndocument.getElementById(\"homeLoad-s17x\").value=60;\ndocument.getElementById(\"heatingLoad-s17x\").value=20;\ndocument.getElementById(\"acLoad-s17x\").value=15;\ndocument.getElementById(\"applianceLoad-s17x\").value=15;\ndocument.getElementById(\"chargerSize-s17x\").value=32;\n\ndocument.getElementById(\"result-s17x\").hidden=true;\n\n}\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>EV Home Electrical Capacity Calculator Check whether your home&#8217;s electrical service can safely support an EV charger. Main breaker size(amps) Main service panel rating. Average home load(amps) Typical household usage.&hellip;<\/p>\n","protected":false},"author":25,"featured_media":0,"parent":652,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/662"}],"collection":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=662"}],"version-history":[{"count":2,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/662\/revisions"}],"predecessor-version":[{"id":664,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/662\/revisions\/664"}],"up":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/652"}],"wp:attachment":[{"href":"https:\/\/e-car.day\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}