{"id":678,"date":"2026-05-31T20:19:07","date_gmt":"2026-05-31T18:19:07","guid":{"rendered":"https:\/\/e-car.day\/?page_id=678"},"modified":"2026-05-31T20:19:08","modified_gmt":"2026-05-31T18:19:08","slug":"solar-panel-ev-savings-calculator","status":"publish","type":"page","link":"https:\/\/e-car.day\/?page_id=678","title":{"rendered":"Solar Panel + EV Savings Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"ev-solar-calc-j60x\">\n\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Solar Panel + EV Savings Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate how much money you can save by charging your electric vehicle with solar energy.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"ev-solar-form-j60x\" novalidate>\n    <div class=\"eco-tool__grid3\">\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-distance-j60x\">Driving distance<br>(km\/year)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-distance-j60x\" type=\"number\" min=\"1\" step=\"1000\" value=\"15000\" inputmode=\"numeric\">\n        <div class=\"eco-tool__hint\">Estimated yearly EV driving distance.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-consumption-j60x\">EV consumption<br>(kWh\/100 km)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-consumption-j60x\" type=\"number\" min=\"1\" step=\"0.1\" value=\"18\" inputmode=\"decimal\">\n        <div class=\"eco-tool__hint\">Typical EVs use 15\u201322 kWh\/100 km.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-price-j60x\">Grid electricity<br>price ($\/kWh)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-price-j60x\" type=\"number\" min=\"0\" step=\"0.01\" value=\"0.20\" inputmode=\"decimal\">\n        <div class=\"eco-tool__hint\">What you pay for electricity from the grid.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-share-j60x\">Solar charging<br>share (%)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-share-j60x\" type=\"number\" min=\"0\" max=\"100\" step=\"1\" value=\"60\" inputmode=\"numeric\">\n        <div class=\"eco-tool__hint\">How much EV charging comes from solar.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-cost-j60x\">Solar system cost<br>($)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-cost-j60x\" type=\"number\" min=\"0\" step=\"100\" value=\"9000\" inputmode=\"decimal\">\n        <div class=\"eco-tool__hint\">Optional: installed cost of your solar system.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"solar-lifetime-j60x\">System lifetime<br>(years)<\/label>\n        <input class=\"eco-tool__input\" id=\"solar-lifetime-j60x\" type=\"number\" min=\"1\" max=\"40\" step=\"1\" value=\"25\" inputmode=\"numeric\">\n        <div class=\"eco-tool__hint\">Used for simple long-term savings estimate.<\/div>\n      <\/div>\n\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"solar-calc-btn-j60x\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"solar-reset-btn-j60x\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"solar-error-j60x\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"solar-result-j60x\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Result<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">EV yearly energy use<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"solar-energy-output-j60x\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Estimated electricity needed for driving.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Solar-covered energy<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"solar-covered-output-j60x\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Part of EV charging covered by solar power.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Yearly charging savings<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"solar-savings-output-j60x\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Estimated grid electricity cost avoided.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Lifetime EV charging savings<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"solar-lifetime-output-j60x\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Savings over selected solar system lifetime.<\/div>\n      <\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\" id=\"solar-note-j60x\">\n      Approximate estimate only. Real solar savings depend on local sun, incentives, battery storage, net metering, electricity tariffs, and charging schedule.\n    <\/p>\n  <\/div>\n\n  <details class=\"eco-tool__details\">\n    <summary class=\"eco-tool__summary\">How we calculate<\/summary>\n    <div class=\"eco-tool__details-body\">\n      <ul class=\"eco-tool__list\">\n        <li>EV yearly energy = distance \u00f7 100 \u00d7 EV consumption<\/li>\n        <li>Solar-covered energy = EV yearly energy \u00d7 solar charging share<\/li>\n        <li>Yearly savings = solar-covered energy \u00d7 grid electricity price<\/li>\n        <li>Lifetime savings = yearly savings \u00d7 system lifetime<\/li>\n      <\/ul>\n    <\/div>\n  <\/details>\n\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:16px;}\n.eco-tool__header{margin-bottom:12px;}\n.eco-tool__title{margin:0 0 8px;}\n.eco-tool__lead{margin:0;opacity:.9;}\n.eco-tool__form{margin-top:12px;}\n.eco-tool__grid3{display:grid;grid-template-columns:1fr;gap:16px;}\n@media (min-width:860px){.eco-tool__grid3{grid-template-columns:1fr 1fr 1fr;}}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px;}\n.eco-tool__label{font-weight:600;}\n.eco-tool__input{width:100%;height:44px;padding:0 12px;border:1px solid rgba(0,0,0,.20);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit;}\n.eco-tool__hint{font-size:.92em;opacity:.78;min-height:38px;}\n.eco-tool__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px;}\n.eco-tool__btn{padding:10px 22px;}\n.eco-tool__btn--ghost{background:transparent!important;border:1px solid rgba(0,0,0,.20)!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__error{min-height:1.2em;font-weight:600;flex:1 1 240px;}\n.eco-tool__result{margin-top:18px;}\n.eco-tool__subtitle{margin:0 0 10px;}\n.eco-tool__cards{display:grid;gap:10px;grid-template-columns:1fr;}\n@media (min-width:860px){.eco-tool__cards{grid-template-columns:1fr 1fr;}}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px;}\n.eco-tool__metric-label{opacity:.85;font-weight:600;}\n.eco-tool__metric-value{font-size:1.7em;font-weight:800;margin-top:6px;line-height:1.1;}\n.eco-tool__metric-sub{opacity:.85;margin-top:6px;}\n.eco-tool__note{margin-top:12px;opacity:.9;}\n.eco-tool__details{margin-top:16px;}\n.eco-tool__summary{cursor:pointer;font-weight:700;}\n.eco-tool__details-body{margin-top:10px;}\n.eco-tool__list{margin:0;padding-left:18px;}\n<\/style>\n\n<script>\n(function(){\n  const S = \"j60x\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const distanceEl = el(\"solar-distance\");\n  const consumptionEl = el(\"solar-consumption\");\n  const priceEl = el(\"solar-price\");\n  const shareEl = el(\"solar-share\");\n  const costEl = el(\"solar-cost\");\n  const lifetimeEl = el(\"solar-lifetime\");\n\n  const calcBtn = el(\"solar-calc-btn\");\n  const resetBtn = el(\"solar-reset-btn\");\n  const errorEl = el(\"solar-error\");\n  const resultEl = el(\"solar-result\");\n\n  const energyOutput = el(\"solar-energy-output\");\n  const coveredOutput = el(\"solar-covered-output\");\n  const savingsOutput = el(\"solar-savings-output\");\n  const lifetimeOutput = el(\"solar-lifetime-output\");\n  const noteEl = el(\"solar-note\");\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n  function fmt(x){ return x.toLocaleString(undefined,{minimumFractionDigits:1,maximumFractionDigits:1}); }\n  function money(x){ return \"$\" + x.toLocaleString(undefined,{minimumFractionDigits:0,maximumFractionDigits:0}); }\n\n  function calculate(){\n    setError(\"\");\n\n    const distance = Number(distanceEl.value);\n    const consumption = Number(consumptionEl.value);\n    const price = Number(priceEl.value);\n    const share = Number(shareEl.value);\n    const systemCost = Number(costEl.value);\n    const lifetime = Number(lifetimeEl.value);\n\n    if(\n      !Number.isFinite(distance) || distance <= 0 ||\n      !Number.isFinite(consumption) || consumption <= 0 ||\n      !Number.isFinite(price) || price < 0 ||\n      !Number.isFinite(share) || share < 0 || share > 100 ||\n      !Number.isFinite(systemCost) || systemCost < 0 ||\n      !Number.isFinite(lifetime) || lifetime <= 0\n    ){\n      setError(\"Please enter valid values.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    const yearlyEnergy = (distance \/ 100) * consumption;\n    const solarCovered = yearlyEnergy * (share \/ 100);\n    const yearlySavings = solarCovered * price;\n    const lifetimeSavings = yearlySavings * lifetime;\n\n    energyOutput.textContent = fmt(yearlyEnergy) + \" kWh\/year\";\n    coveredOutput.textContent = fmt(solarCovered) + \" kWh\/year\";\n    savingsOutput.textContent = money(yearlySavings) + \"\/year\";\n    lifetimeOutput.textContent = money(lifetimeSavings);\n\n    const net = lifetimeSavings - systemCost;\n    if(systemCost > 0){\n      noteEl.textContent = \"Simple net estimate after solar system cost: \" + money(net) + \". This is a simplified estimate and does not include incentives, home electricity savings, financing, or maintenance.\";\n    } else {\n      noteEl.textContent = \"Approximate estimate only. Real solar savings depend on local sun, incentives, battery storage, net metering, electricity tariffs, and charging schedule.\";\n    }\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    distanceEl.value = \"15000\";\n    consumptionEl.value = \"18\";\n    priceEl.value = \"0.20\";\n    shareEl.value = \"60\";\n    costEl.value = \"9000\";\n    lifetimeEl.value = \"25\";\n    resultEl.hidden = true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Solar Panel + EV Savings Calculator Estimate how much money you can save by charging your electric vehicle with solar energy. Driving distance(km\/year) Estimated yearly EV driving distance. EV consumption(kWh\/100&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\/678"}],"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=678"}],"version-history":[{"count":1,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/678\/revisions"}],"predecessor-version":[{"id":679,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/678\/revisions\/679"}],"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=678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}