Solar Load & Savings Estimator
Solar Load & Savings Calculator
Estimate the right solar solution for your energy needs with our easy-to-use Solar Calculator. Get an idea of your required solar system size, number of solar panels, inverter capacity, battery backup, and potential monthly savings based on your electricity consumption. Enter your energy usage details and discover the ideal solar system for your home or business.
Customer Solar Requirement
Add customer details, appliances and assumptions to generate a professional quote.
Customer & Site Details
Add Appliances
Watts or Amps accepted220V assumed for amp conversionEssential appliances can be selected for battery backup
| Appliance | Watts | Qty | Hours | Daily kWh | Battery Priority |
|---|
Solar & Battery Assumptions
Battery formula: Required Ah = (Backup kWh × 1000) ÷ Battery Voltage ÷ DoD ÷ Efficiency. Basic hybrid mode keeps a default 5kWh battery because K-Electric / WAPDA remains available as secondary source. 100% mode calculates battery for the complete appliance load.
'+body.replace(/id="downloadInside"/g,'').replace(/id="printInside"/g,'')+'
';
const di=$('downloadInside'), pi=$('printInside');
if(di) di.onclick=downloadQuote;
if(pi) pi.onclick=printQuote;
if(show) $('quoteArea').scrollIntoView({behavior:'smooth',block:'start'});
}
function downloadQuote(){
generateQuote(false);
const customer=($('customerName').value.trim()||'website-visitor').toLowerCase().replace(/[^a-z0-9]+/g,'-').replace(/^-|-$/g,'') || 'website-visitor';
const fileName='eea-automation-quote-'+customer+'.html';
const html=fullQuoteHtml();
if(downloadUrl) URL.revokeObjectURL(downloadUrl);
const blob=new Blob([html],{type:'text/html;charset=utf-8'});
downloadUrl=URL.createObjectURL(blob);
const a=document.createElement('a');
a.href=downloadUrl; a.download=fileName; a.style.display='none'; document.body.appendChild(a); a.click(); a.remove();
$('manualDownload').href=downloadUrl; $('manualDownload').download=fileName; $('manualBox').classList.add('isc-show');
toast('Quote generated. If download did not start, use the manual download link.');
}
function printQuote(){
generateQuote(false);
toast('Opening print window. Choose Save as PDF to download PDF.');
setTimeout(()=>window.print(),100);
}
async function copySummary(){
const text=summaryText();
try{ await navigator.clipboard.writeText(text); toast('Summary copied'); }
catch(e){ const t=document.createElement('textarea'); t.value=text; document.body.appendChild(t); t.select(); document.execCommand('copy'); t.remove(); toast('Summary copied'); }
}
function loadSample(){
appliances=[
{id:'s1',name:'LED Bulbs',watts:12,qty:8,hours:6,priority:'essential'},
{id:'s2',name:'Ceiling Fans',watts:80,qty:5,hours:10,priority:'essential'},
{id:'s3',name:'Refrigerator',watts:200,qty:1,hours:24,priority:'essential'},
{id:'s4',name:'LED TV',watts:120,qty:1,hours:5,priority:'normal'},
{id:'s5',name:'Wi-Fi Router',watts:15,qty:1,hours:24,priority:'essential'},
{id:'s6',name:'1.5 Ton Inverter AC',watts:1400,qty:1,hours:8,priority:'heavy'},
{id:'s7',name:'Water Pump 1 HP',watts:750,qty:1,hours:1,priority:'heavy'}
];
save(); render(); toast('Sample home loaded');
}
function save(){
const data={appliances}; ['customerName','phone','city','propertyType','phase','roof','bill','unitRate','sunHours','panelWatt','performance','backupMode','basicBatteryKwh','batteryVoltage','dod','efficiency','notes'].forEach(id=>data[id]=$(id).value);
try{ localStorage.setItem('eeaAutomationCalculatorV4', JSON.stringify(data)); }catch(e){}
}
function restore(){
try{ const data=JSON.parse(localStorage.getItem('eeaAutomationCalculatorV4')||'{}'); if(Array.isArray(data.appliances)) appliances=data.appliances; Object.keys(data).forEach(k=>{ if($(k) && k!=='appliances') $(k).value=data[k]; }); }catch(e){}
}
function wire(){
$('addBtn').onclick=addAppliance; $('updateBtn').onclick=updateAppliance; $('cancelBtn').onclick=resetForm; $('clearBtn').onclick=clearAll; $('sampleBtn').onclick=loadSample;
$('downloadBtn').onclick=downloadQuote; $('downloadTop').onclick=downloadQuote; $('printBtn').onclick=printQuote; $('printTop').onclick=printQuote; $('copyBtn').onclick=copySummary;
['customerName','phone','city','propertyType','phase','roof','bill','unitRate','sunHours','panelWatt','performance','backupMode','basicBatteryKwh','batteryVoltage','dod','efficiency','notes'].forEach(id=>$(id).addEventListener('input',()=>{save();renderResults();}));
['propertyType','phase','roof','backupMode','batteryVoltage'].forEach(id=>$(id).addEventListener('change',()=>{save();renderResults();}));
['applianceName','watts','amps','qty','hours'].forEach(id=>$(id).addEventListener('keydown',e=>{ if(e.key==='Enter'){e.preventDefault(); (editId?$('updateBtn'):$('addBtn')).click(); }}));
}
wire(); restore(); render();
})();