Estimate your potential savings and system size with Tesla Solar.
.tesla-solar-calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f9f9f9;
border: 1px solid #ddd;
border-radius: 8px;
padding: 25px;
max-width: 700px;
margin: 20px auto;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
color: #333;
}
.tesla-solar-calculator-container h2 {
color: #1a1a1a;
text-align: center;
margin-bottom: 20px;
font-size: 2em;
}
.tesla-solar-calculator-container p {
text-align: center;
margin-bottom: 25px;
font-size: 1.1em;
line-height: 1.6;
}
.calculator-inputs label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: #555;
font-size: 0.95em;
}
.calculator-inputs input[type="number"] {
width: calc(100% – 22px);
padding: 12px;
margin-bottom: 18px;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 1em;
box-sizing: border-box;
}
.calculator-inputs input[type="number"]:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 5px rgba(0, 123, 255, 0.3);
}
.calculator-inputs button {
display: block;
width: 100%;
padding: 15px;
background-color: #cc0000; /* Tesla red */
color: white;
border: none;
border-radius: 5px;
font-size: 1.1em;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 20px;
}
.calculator-inputs button:hover {
background-color: #a30000;
transform: translateY(-2px);
}
.calculator-inputs button:active {
transform: translateY(0);
}
.calculator-results {
margin-top: 30px;
padding-top: 25px;
border-top: 1px solid #eee;
background-color: #eef7ff;
border-radius: 8px;
padding: 20px;
box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}
.calculator-results h3 {
color: #0056b3;
text-align: center;
margin-bottom: 20px;
font-size: 1.8em;
}
.calculator-results p {
font-size: 1.05em;
margin-bottom: 10px;
line-height: 1.5;
color: #333;
text-align: left;
}
.calculator-results p strong {
color: #000;
font-weight: 600;
}
.calculator-results .highlight {
color: #28a745;
font-weight: bold;
font-size: 1.1em;
}
.calculator-results .error {
color: #dc3545;
font-weight: bold;
text-align: center;
}
function calculateTeslaSolar() {
var averageMonthlyBill = parseFloat(document.getElementById("averageMonthlyBill").value);
var currentElectricityRate = parseFloat(document.getElementById("currentElectricityRate").value);
var dailyPeakSunlightHours = parseFloat(document.getElementById("dailyPeakSunlightHours").value);
var teslaSolarCostPerWatt = parseFloat(document.getElementById("teslaSolarCostPerWatt").value);
var federalTaxCreditPercentage = parseFloat(document.getElementById("federalTaxCreditPercentage").value);
var resultsDiv = document.getElementById("teslaSolarResults");
resultsDiv.innerHTML = ""; // Clear previous results
// Input validation
if (isNaN(averageMonthlyBill) || averageMonthlyBill < 0 ||
isNaN(currentElectricityRate) || currentElectricityRate <= 0 ||
isNaN(dailyPeakSunlightHours) || dailyPeakSunlightHours <= 0 ||
isNaN(teslaSolarCostPerWatt) || teslaSolarCostPerWatt <= 0 ||
isNaN(federalTaxCreditPercentage) || federalTaxCreditPercentage 100) {
resultsDiv.innerHTML = "Please enter valid positive numbers for all fields.";
return;
}
// Constants and Assumptions
var systemEfficiencyFactor = 0.80; // Accounts for various losses (inverter, wiring, temperature, etc.)
var systemLifespanYears = 25;
var electricityPriceInflationRate = 0.03; // 3% annual increase in electricity prices
var systemDegradationRate = 0.005; // 0.5% annual degradation in panel efficiency
// 1. Estimated Annual Electricity Consumption (kWh)
var estimatedAnnualConsumption = (averageMonthlyBill / currentElectricityRate) * 12;
// 2. Recommended Tesla Solar System Size (kW)
// Formula: Annual Consumption / (Daily Peak Sunlight Hours * 365 days * System Efficiency Factor)
var recommendedSystemSizeKW = estimatedAnnualConsumption / (dailyPeakSunlightHours * 365 * systemEfficiencyFactor);
recommendedSystemSizeKW = Math.ceil(recommendedSystemSizeKW * 10) / 10; // Round up to nearest 0.1 kW
// 3. Estimated Annual Electricity Production (kWh)
var estimatedAnnualProduction = recommendedSystemSizeKW * 1000 * dailyPeakSunlightHours * 365 * systemEfficiencyFactor / 1000; // Convert kW to W for calculation, then back to kWh
// 4. Total System Cost Before Tax Credit
var totalSystemCostBeforeCredit = recommendedSystemSizeKW * 1000 * teslaSolarCostPerWatt; // kW to W, then multiply by $/W
// 5. Federal Tax Credit Amount
var federalTaxCreditAmount = totalSystemCostBeforeCredit * (federalTaxCreditPercentage / 100);
// 6. Net System Cost After Federal Tax Credit
var netSystemCostAfterCredit = totalSystemCostBeforeCredit – federalTaxCreditAmount;
// 7. Estimated First-Year Electricity Savings
var firstYearSavings = estimatedAnnualProduction * currentElectricityRate;
// 8. Estimated Payback Period (simplified)
var estimatedPaybackPeriod = netSystemCostAfterCredit / firstYearSavings;
// 9. Estimated Total Savings Over 25 Years (factoring in inflation and degradation)
var totalSavings25Years = 0;
var currentAnnualSavings = firstYearSavings;
for (var i = 0; i < systemLifespanYears; i++) {
// Adjust for electricity price inflation
currentAnnualSavings *= (1 + electricityPriceInflationRate);
// Adjust for system degradation
currentAnnualSavings *= (1 – systemDegradationRate);
totalSavings25Years += currentAnnualSavings;
}
// Display Results
var resultsHTML = "
Your Tesla Solar Estimate:
";
resultsHTML += "Based on your inputs, here's an estimate for your potential Tesla Solar system:";
resultsHTML += "Estimated Annual Electricity Consumption: " + estimatedAnnualConsumption.toFixed(0) + " kWh";
resultsHTML += "Recommended Tesla Solar System Size:" + recommendedSystemSizeKW.toFixed(1) + " kW";
resultsHTML += "Estimated Annual Electricity Production: " + estimatedAnnualProduction.toFixed(0) + " kWh";
resultsHTML += "Total System Cost (Before Tax Credit): $" + totalSystemCostBeforeCredit.toFixed(2) + "";
resultsHTML += "Federal Solar Tax Credit (" + federalTaxCreditPercentage.toFixed(0) + "%): $" + federalTaxCreditAmount.toFixed(2) + "";
resultsHTML += "Net System Cost (After Federal Tax Credit):$" + netSystemCostAfterCredit.toFixed(2) + "";
resultsHTML += "Estimated First-Year Electricity Savings:$" + firstYearSavings.toFixed(2) + "";
resultsHTML += "Estimated Payback Period:" + estimatedPaybackPeriod.toFixed(1) + " Years";
resultsHTML += "Estimated Total Savings Over " + systemLifespanYears + " Years:$" + totalSavings25Years.toFixed(2) + "";
resultsHTML += "Note: This is an estimate. Actual costs and savings may vary based on your specific location, roof characteristics, energy usage patterns, and final system design. It does not include potential state or local incentives, or the cost of a Powerwall battery.";
resultsDiv.innerHTML = resultsHTML;
}
Unlock Energy Independence with Tesla Solar
Tesla Solar offers a sleek, integrated approach to harnessing the sun's power for your home. More than just solar panels, Tesla's ecosystem is designed for efficiency, aesthetics, and seamless energy management, often paired with their Powerwall battery storage solutions.
Why Consider Tesla Solar?
Significant Cost Savings: By generating your own electricity, you can drastically reduce or even eliminate your monthly utility bills, protecting yourself from rising electricity rates.
Environmental Impact: Reduce your carbon footprint by using clean, renewable energy. Every kWh generated by solar means less reliance on fossil fuels.
Energy Independence: With optional Powerwall battery storage, your home can remain powered during grid outages, providing peace of mind and true energy resilience.
Integrated Design: Tesla's solar panels are known for their low-profile, minimalist design that blends beautifully with your roof, unlike bulkier traditional systems.
Smart Energy Management: Monitor and manage your energy production and consumption in real-time through the intuitive Tesla app, optimizing your home's energy flow.
How Tesla Solar Works
Solar panels installed on your roof capture sunlight and convert it into direct current (DC) electricity. An inverter then converts this DC electricity into alternating current (AC) electricity, which is what your home appliances use. Any excess electricity generated can be sent back to the grid (if net metering is available in your area), or stored in a Tesla Powerwall battery for later use.
Understanding Your Solar Savings Estimate
Our Tesla Solar Savings Calculator helps you get a preliminary idea of what a solar system could mean for your home. Here's a breakdown of the key factors:
Average Monthly Electricity Bill: This is a crucial input as it helps us estimate your annual electricity consumption, which in turn determines the size of the solar system you'll need to offset your usage.
Current Electricity Rate: Your cost per kilowatt-hour (kWh) directly impacts how much you save for every unit of electricity your solar panels produce.
Average Daily Peak Sunlight Hours: The amount of effective sunlight your location receives each day is vital for calculating how much electricity your panels can generate. Sunnier regions naturally produce more.
Estimated Tesla Solar System Cost per Watt: Tesla's pricing can vary by region and system size. This input allows you to use a current estimate for their system costs.
Federal Solar Tax Credit: The Investment Tax Credit (ITC) allows homeowners to deduct a percentage of the cost of installing a solar energy system from their federal taxes. This significantly reduces the net cost of your system.
Beyond the Calculator: What's Next?
While this calculator provides a valuable estimate, a personalized Tesla Solar quote will consider many more specific details, such as:
Your exact roof dimensions, angle, and shading.
Local building codes and permitting requirements.
Specific state and local incentives or rebates available in your area.
The inclusion of Tesla Powerwall batteries for energy storage.
Your precise energy consumption patterns throughout the day.
To get an accurate assessment and a detailed proposal, we recommend visiting the official Tesla Solar website or contacting a certified Tesla installer in your region.