Home Solar Calculator
Select your ACs and system type — get an instant estimate. Faisalabad averages 6.5+ peak sun hours in summer.
Run your ACs all day during sun hours — cold home, no guilt. Faisalabad gets 6.5+ peak sun hours in summer — that's 6–8 hours of free, uninterrupted AC every day. A genuine gift for the elderly and housewives this summer.
How the Calculator Works
Enter Your Monthly Units
Find this on your WAPDA/FESCO electricity bill under "Units Consumed" or "kWh". Use your summer average for a conservative estimate.
Select Your Tariff Slab
Pakistan uses a tiered tariff system. Higher monthly consumption = higher rate per unit. Your bill shows which slab you fall in.
Choose System Type
On-grid: cheapest, no backup when grid cuts. Hybrid (inverter only): future-proof — add battery later with no rewiring. Hybrid with battery (recommended): seamless backup during load-shedding and stores solar for evening use.
Get Your Estimate
The calculator uses 5.3 PSH annual average and 2026 installed cost benchmarks. Summer production is 20–30% higher — Faisalabad averages 6.5+ PSH from April to July.
Solar System Size Reference Table
| Monthly Units | Typical Home | Recommended Size | Panels (650W) | Hybrid Cost (Est.) | Est. Annual Saving |
|---|---|---|---|---|---|
| 300–400 | Small flat, 1 AC | 4 kW | 6 panels | ~Rs. 520K | ~Rs. 88K |
| 500–700 | 3-bed home, 1–2 ACs | 5–7 kW | 8–10 panels | Rs. 650–910K | Rs. 138–193K |
| 800–1,000 | Large home, 2–3 ACs | 7–10 kW | 11–15 panels | Rs. 910K–1.3M | Rs. 222–277K |
| 1,200–1,500 | Villa, 4–5 ACs | 15 kW | ~23 panels | ~Rs. 1.95M | Rs. 396–495K |
| 2,000+ | Large villa/farmhouse | 16–20 kW | 25–31 panels | Rs. 2.08M–2.6M | Rs. 660K+ |
* For hybrid systems, inverter capacity must cover peak simultaneous load — not just production. 1–2 ACs: 6 kW inverter · 3 ACs: 8 kW · 4–5 ACs: 10–12 kW.
What Affects Your Solar System Size?
Air Conditioner Tonnage
A 1.5-ton inverter AC consumes approximately 1.2–1.5 kW/hour. Running 3 ACs for 10 hours adds 36–45 kWh/day — the biggest driver of system size for Pakistani homes.
Roof Orientation & Shading
South-facing roofs with no shading deliver maximum output. East/west-facing roofs produce 15–20% less. Shading from trees or water tanks reduces output significantly.
Battery vs. No Battery
Without a battery, your solar saves on daytime bills only — grid powers you at night and during load-shedding. A 5–10 kWh battery covers 4–6 hours of load-shedding and stores solar for evening use, pushing annual savings from ~35% to ~55% of your bill.
Large Battery — Is It Worth It?
For areas with 8–12 hours of load-shedding, a 10–20 kWh battery bank covers the full outage and stores surplus for the next morning. The additional cost (Rs. 200–400K) typically adds 1–2 years to payback but gives complete energy independence.