Home Charging Cost Calculator (Georgia Power Rates)

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Home Charging Cost Calculator (Georgia Power Rates)

Estimate your monthly and annual EV home charging costs based on Georgia Power residential electricity rates, your vehicle's efficiency, and your driving habits.

Miles Driven Per Month

Average U.S. driver: ~1,100 miles/month

Vehicle Efficiency (miles per kWh)

Typical EVs: 2.5–4.5 mi/kWh. Check your owner's manual or EPA label.

Georgia Power Rate Plan

Residential Standard (Schedule R) — ~$0.1181/kWh Time-of-Use EV Rate (Schedule EV-TOU) — Off-Peak ~$0.0620/kWh Time-of-Use EV Rate (Schedule EV-TOU) — On-Peak ~$0.2200/kWh

Schedule EV-TOU off-peak hours: 11 PM – 7 AM weekdays, all day weekends.

Charger Efficiency (%)

Level 2 chargers are typically 85–95% efficient. Default: 90%.

Georgia Power Monthly Base Charge ($)

Standard residential customer charge: ~$10.00/month. Enter 0 to exclude.

Calculate

function homCalc() { // --- Grab inputs --- var milesVal = document.getElementById('hom-miles').value.trim(); var efficiencyVal = document.getElementById('hom-efficiency').value.trim(); var ratePlan = document.getElementById('hom-rate-plan').value; var chargerEffVal = document.getElementById('hom-charger-efficiency').value.trim(); var baseChargeVal = document.getElementById('hom-base-charge').value.trim();

var resultDiv = document.getElementById('hom-result'); resultDiv.style.display = 'block';

// --- Validation --- var errors = [];

var miles = parseFloat(milesVal); if (milesVal === '' || isNaN(miles) || miles 10000) { errors.push('Miles driven per month must be between 0 and 10,000.'); }

var efficiency = parseFloat(efficiencyVal); if (efficiencyVal === '' || isNaN(efficiency) || efficiency 10) { errors.push('Vehicle efficiency must be between 0.5 and 10 mi/kWh.'); }

var chargerEff = parseFloat(chargerEffVal); if (chargerEffVal === '' || isNaN(chargerEff) || chargerEff 100) { errors.push('Charger efficiency must be between 50% and 100%.'); }

var baseCharge = parseFloat(baseChargeVal); if (baseChargeVal === '' || isNaN(baseCharge) || baseCharge 100) { errors.push('Monthly base charge must be between $0 and $100.'); }

if (errors.length > 0) { resultDiv.className = 'calc-result calc-error'; resultDiv.innerHTML = 'Please fix the following errors:' + errors.map(function(e){ return ''; }).join('') + ''; return; }

// --- Rate lookup (Georgia Power 2024 rates) --- var ratePerKwh; var rateName; if (ratePlan === 'residential_standard') { ratePerKwh = 0.1181; rateName = 'Schedule R (Standard Residential)'; } else if (ratePlan === 'residential_tou') { ratePerKwh = 0.0620; rateName = 'Schedule EV-TOU (Off-Peak)'; } else { ratePerKwh = 0.2200; rateName = 'Schedule EV-TOU (On-Peak)'; }

// --- Core Formula --- // kWh drawn from grid per month = (miles / efficiency) / (chargerEff / 100) var chargerEffDecimal = chargerEff / 100; var kwhNeededByVehicle = miles / efficiency; // kWh consumed by vehicle var kwhDrawnFromGrid = kwhNeededByVehicle / chargerEffDecimal; // kWh pulled from wall

// Monthly charging cost (energy only) var monthlyEnergyCost = kwhDrawnFromGrid * ratePerKwh;

// Total monthly cost including base charge var monthlyTotalCost = monthlyEnergyCost + baseCharge;

// Annual cost var annualTotalCost = monthlyTotalCost * 12;

// Cost per mile var costPerMile = miles > 0 ? monthlyTotalCost / miles : 0;

// Cost per 100 miles var costPer100Miles = costPerMile * 100;

// --- Format output --- resultDiv.className = 'calc-result calc-success'; resultDiv.innerHTML = '### ⚡ Charging Cost Estimate ' + '' + 'Rate Plan' + rateName + '' + 'Rate ($/kWh)$' + ratePerKwh.toFixed(4) + '' + 'Miles / Month' + miles.toLocaleString() + ' mi' + 'Vehicle Efficiency' + efficiency.toFixed(2) + ' mi/kWh' + 'Charger Efficiency' + chargerEff.toFixed(0) + '%' + 'kWh Needed by Vehicle / Month' + kwhNeededByVehicle.toFixed(2) + ' kWh' + 'kWh Drawn from Grid / Month' + kwhDrawnFromGrid.toFixed(2) + ' kWh' + 'Monthly Energy Cost$' + monthlyEnergyCost.toFixed(2) + '' + 'Monthly Base Charge$' + baseCharge.toFixed(2) + '' + 'Total Monthly Cost$' + monthlyTotalCost.toFixed(2) + '' + 'Total Annual Cost$' + annualTotalCost.toFixed(2) + '' + 'Cost per Mile$' + costPerMile.toFixed(4) + '/mi' + 'Cost per 100 Miles$' + costPer100Miles.toFixed(2) + '/100 mi' + ''; }

#### Formula

Step 1 — kWh needed by vehicle per month: kWhvehicle = Miles per Month ÷ Vehicle Efficiency (mi/kWh)

Step 2 — kWh drawn from grid per month (accounting for charger losses): kWhgrid = kWhvehicle ÷ (Charger Efficiency / 100)

Step 3 — Monthly energy cost: Monthly Energy Cost ($) = kWhgrid × Rate ($/kWh)

Step 4 — Total monthly cost: Total Monthly Cost ($) = Monthly Energy Cost + Monthly Base Charge

Step 5 — Annual cost: Annual Cost ($) = Total Monthly Cost × 12

Step 6 — Cost per mile: Cost per Mile ($) = Total Monthly Cost ÷ Miles per Month

#### Assumptions & References

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References

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