Charging Station Level Comparison Calculator
ANA›Life Services Authority›National Calculator Authority›Charging Station Level Comparison Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Charging Station Level Comparison Calculator
Compare Level 1, Level 2, and DC Fast Charging (DCFC) stations by estimating charge time, energy cost, and cost per mile for your electric vehicle.
Battery Capacity (kWh)
Current State of Charge (%)
Target State of Charge (%)
Vehicle Efficiency (miles/kWh)
Electricity Rate ($/kWh)
DC Fast Charger Session Rate ($/kWh or flat $/min — enter $/kWh)
Calculate
function chaCalc() { var resultDiv = document.getElementById('cha-result'); resultDiv.style.display = 'block'; resultDiv.className = 'calc-result';
var batteryCapacity = parseFloat(document.getElementById('cha-battery-capacity').value); var currentSoc = parseFloat(document.getElementById('cha-current-soc').value); var targetSoc = parseFloat(document.getElementById('cha-target-soc').value); var efficiency = parseFloat(document.getElementById('cha-efficiency').value); var electricityRate = parseFloat(document.getElementById('cha-electricity-rate').value); var dcfcRate = parseFloat(document.getElementById('cha-dcfc-rate').value);
// --- Validation --- if (isNaN(batteryCapacity) || batteryCapacity 99) { resultDiv.className = 'calc-result calc-error'; resultDiv.innerHTML = '⚠ Current state of charge must be between 0% and 99%.'; return; } if (isNaN(targetSoc) || targetSoc 100) { resultDiv.className = 'calc-result calc-error'; resultDiv.innerHTML = '⚠ Target state of charge must be between 1% and 100%.'; return; } if (targetSoc '; html += '' + 'Metric' + 'Level 1(120V / 1.4 kW)' + 'Level 2(240V / 7.2 kW)' + 'DC Fast Charge(50 kW)' + '';
html += 'Charge Time' + '' + fmtTime(timeL1) + '' + '' + fmtTime(timeL2) + '' + '' + fmtTime(timeDCFC) + '';
html += 'Grid Energy Drawn (kWh)' + '' + gridEnergyL1.toFixed(2) + '' + '' + gridEnergyL2.toFixed(2) + '' + '' + gridEnergyDCFC.toFixed(2) + '';
html += 'Charger Efficiency' + '85%' + '88%' + '92%';
html += 'Session Cost' + '$' + costL1.toFixed(2) + '' + '$' + costL2.toFixed(2) + '' + '$' + costDCFC.toFixed(2) + '';
html += 'Cost per Mile' + '$' + cpmL1.toFixed(3) + '' + '$' + cpmL2.toFixed(3) + '' + '$' + cpmDCFC.toFixed(3) + '';
html += '';
// Recommendation var cheapest = (costL1
#### Formulas Used
Energy needed (into battery): Ebattery = Battery Capacity (kWh) × (Target SOC% − Current SOC%) / 100
Grid energy drawn: Egrid = Ebattery / ηcharger where η = 0.85 (L1), 0.88 (L2), 0.92 (DCFC)
Charge time: T (hours) = Egrid / Pcharger where P = 1.4 kW (L1), 7.2 kW (L2), 50 kW (DCFC)
Session cost: Cost = Egrid × Rate ($/kWh)
Range added: Range (miles) = Ebattery × Vehicle Efficiency (miles/kWh)
Cost per mile: CPM = Session Cost / Range Added
#### Assumptions & References
- Level 1 charger: 120V AC, 12A circuit → 1.4 kW output (SAE J1772).
- Level 2 charger: 240V AC, 30A circuit → 7.2 kW output (SAE J1772); home units range 3.3–19.2 kW.
- DC Fast Charger: 50 kW used as a common public baseline; CHAdeMO / CCS units range 24–350 kW.
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