SunFusion Solar Calculator
Select Solar Panel
// Add this after your main calculation code
// Financing Calculator
function calculateFinancing(totalCost) {
const interestRates = {
'5_year': 0.0499, // 4.99% APR
'10_year': 0.0549, // 5.49% APR
'15_year': 0.0599, // 5.99% APR
'20_year': 0.0649, // 6.49% APR
'25_year': 0.0699 // 6.99% APR
};
const financingDiv = document.createElement('div');
financingDiv.className = 'result-box financing-section';
financingDiv.style.gridColumn = '1 / -1';
let financingContent = '
Financing Options
';
Object.entries(interestRates).forEach(([term, rate]) => {
const years = parseInt(term);
const monthlyPayment = calculateMonthlyPayment(totalCost, rate, years);
const totalPayment = monthlyPayment * years * 12;
financingContent += `
\${years} Year Term
Interest Rate: \${(rate * 100).toFixed(2)}%
Monthly Payment: \$\${monthlyPayment.toFixed(2)}
Total Cost: \$\${totalPayment.toLocaleString()}
`;
});
financingContent += '
';
financingDiv.innerHTML = financingContent;
document.querySelector('.results-grid').appendChild(financingDiv);
}
// Monthly Payment Calculator
function calculateMonthlyPayment(principal, annualRate, years) {
const monthlyRate = annualRate / 12;
const numberOfPayments = years * 12;
return (principal * monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) /
(Math.pow(1 + monthlyRate, numberOfPayments) - 1);
}
// Environmental Impact Calculator
function calculateEnvironmentalImpact(annualProduction) {
const co2PerKwh = 0.855; // lbs of CO2 per kWh
const treesPerTonCo2 = 45; // trees needed to absorb 1 ton of CO2
const milesPerKwh = 2.4; // miles driven per kWh equivalent
const homesPowered = annualProduction / 10715; // average home uses 10,715 kWh per year
const annualCo2Reduction = (annualProduction * co2PerKwh) / 2000; // Convert to tons
const treesEquivalent = Math.round(annualCo2Reduction * treesPerTonCo2);
const milesEquivalent = Math.round(annualProduction * milesPerKwh);
const environmentalDiv = document.createElement('div');
environmentalDiv.className = 'result-box environmental-section';
environmentalDiv.style.gridColumn = '1 / -1';
environmentalDiv.innerHTML = `
Environmental Impact
🌍
\${annualCo2Reduction.toFixed(1)} tons
Annual CO₂ Reduction
🌳
\${treesEquivalent.toLocaleString()}
Equivalent Trees Planted
🚗
\${milesEquivalent.toLocaleString()}
Miles Not Driven
🏠
\${homesPowered.toFixed(1)}
Homes Powered
`;
document.querySelector('.results-grid').appendChild(environmentalDiv);
}
// Add these styles to your existing CSS
const additionalStyles = `
.financing-section,
.environmental-section {
margin-top: 20px;
}
.financing-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 15px;
margin-top: 15px;
}
.financing-option {
background: rgba(0, 4, 40, 0.6);
border: 1px solid var(--primary-color);
border-radius: 8px;
padding: 15px;
}
.financing-option .term {
color: var(--primary-color);
font-size: 1.2em;
margin-bottom: 10px;
}
.financing-option .details {
font-size: 0.9em;
}
.environmental-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
gap: 20px;
margin-top: 15px;
text-align: center;
}
.impact-item {
background: rgba(0, 4, 40, 0.6);
border: 1px solid var(--primary-color);
border-radius: 8px;
padding: 15px;
}
.impact-icon {
font-size: 2em;
margin-bottom: 10px;
}
.impact-value {
color: var(--primary-color);
font-size: 1.4em;
margin-bottom: 5px;
}
.impact-label {
font-size: 0.9em;
opacity: 0.8;
}
`;
// Add the styles to the document
const styleSheet = document.createElement('style');
styleSheet.textContent = additionalStyles;
document.head.appendChild(styleSheet);
// Update your calculate button event listener to include these calculations
document.getElementById('calculateBtn').addEventListener('click', function() {
// After your main calculations and results display:
calculateFinancing(netCost);
calculateEnvironmentalImpact(annualProduction);
});
`;
// Update the calculate button click handler to include export buttons
const originalCalculateHandler = document.getElementById('calculateBtn').onclick;
document.getElementById('calculateBtn').onclick = function() {
originalCalculateHandler();
addExportButtons();
};
