SolarEstimate

Solar Calculator Pakistan

Free online solar calculator for Pakistani homes and businesses. Enter your electricity bill — or upload a WAPDA, K-Electric, LESCO or IESCO PDF — and see exactly what size solar system you need, what it'll cost, and when it pays for itself.

Start the calculator See 5kW system price

What this solar calculator does

The solar calculator on this page sizes a complete rooftop solar system from a single input — your electricity bill. It computes the kW system size your home needs, the number of 550 W panels required, the roof space those panels will occupy, a battery recommendation if you want backup, and the monthly and lifetime savings the system will deliver against your tariff slab.

Every calculation is tuned for Pakistan: PKR costs, local peak sun hours, NEPRA net metering rules, and the slab structure used by K-Electric, LESCO, IESCO, MEPCO, FESCO, HESCO, QESCO, GEPCO, SEPCO and PESCO. You don't need an installer quote to get started — run the calculator first so you can compare quotes against an independent baseline.

How the calculation works

A solar system is sized to your monthly units (kWh). The calculator divides your monthly units by your city's peak sun hours, 30 days per month, and a system efficiency factor (typically 0.78 to account for inverter losses, wiring, soiling, and temperature derating). The result is the kW the panels must produce. From there:

  • Panel count = system kW ÷ 0.55 kW per panel, rounded up.
  • Roof space = panel count × 20 sq ft per panel (standard residential tilt).
  • Installed cost = system kW × your city's PKR per kW (defaults to PKR 170,000–185,000/kW for 2025).
  • Monthly savings = units offset × your tariff slab, capped at your actual bill.
  • Payback years = installed cost ÷ annual savings.
  • Lifetime savings (25 years) = compounded savings with 6% tariff escalation and 0.6% annual panel degradation.

WAPDA solar calculator and bill upload

The calculator doubles as a WAPDA solar calculator — it reads bills from every DISCO that issues a WAPDA-format statement. Upload a PDF and the parser pulls out your units consumed and amount payable; you confirm the values and run the estimate. For K-Electric bills the same parser handles their slightly different format. If you don't have a PDF on hand, use the manual entry form on the second tab — six fields, 30 seconds.

Free, no signup, runs locally

This is a free solar calculator. There is no signup, no email gate, and no callbacks from sales reps. Every calculation happens in your browser — your bill data and address never leave your device. Save your history locally, export a PDF of your estimate, and compare different system sizes side-by-side without anyone in the loop.

What's not included

The calculator is a sizing and feasibility tool, not a bankable installer proposal. It doesn't survey your roof for shading or structural capacity, doesn't price a specific brand of panel or inverter, and doesn't handle DISCO-specific paperwork. Use the estimate as your reference number when you talk to installers — quotes that are wildly different from the estimate are worth questioning.

Solar calculator FAQs

How does the solar estimate calculator work?
Enter your monthly electricity bill, units consumed (kWh), and city — or upload a WAPDA / K-Electric / IESCO / LESCO bill PDF. The calculator sizes a solar system that offsets your usage based on local peak sun hours, applies current installed costs in PKR, and projects savings against your tariff slab. Results include system size in kW, panel count, monthly savings, and payback years.
Is the solar calculator free to use?
Yes. SolarEstimateOnline is a free solar calculator for Pakistan. There is no signup, no email gate, and no callback from sales reps. Every calculation runs in your browser — your bill data never leaves your device.
How accurate is the solar estimate?
The estimate is accurate within roughly ±10% for residential systems. We use NEPRA-published tariff slabs, average per-city peak sun hours, and current installed system costs from Pakistan's solar market. For a binding quote you still need an on-site survey, but the calculator is designed to be within range of real installer proposals.
What is net metering in Pakistan and how does it affect savings?
Net metering lets you export surplus solar generation back to your DISCO and receive credit at NEPRA's notified buyback rate (currently around PKR 10/unit for new connections). The calculator factors this in when sizing your system — oversizing beyond your usage gives diminishing returns under the new tariff.
What size solar system do I need for my home in Pakistan?
Most residential homes in Pakistan need a 5kW to 10kW system. A 5kW system covers bills around PKR 25,000–40,000 and 1–2 ACs. A 10kW system covers bills of PKR 50,000+ and 3–4 ACs. The exact size depends on your monthly units, roof orientation, and whether you want a battery for load-shedding.
How much does a 5kW solar system cost in Pakistan?
A 5kW on-grid solar system in Pakistan typically costs between PKR 850,000 and PKR 1,100,000 fully installed in 2025, including panels, inverter, mounting structure, wiring, and net-metering paperwork. Hybrid systems with lithium batteries add roughly PKR 65,000–80,000 per kWh of battery.
How long does a solar system take to pay back in Pakistan?
With current tariffs of PKR 45–60 per unit in upper slabs and installed costs around PKR 170,000–185,000 per kW, most residential solar systems in Pakistan now pay back in 2.5 to 4 years. Commercial systems with higher daytime consumption can pay back even faster.
Can I use this calculator if I'm a WAPDA / K-Electric customer?
Yes. The calculator works for every Pakistani DISCO — K-Electric, LESCO, IESCO, MEPCO, FESCO, HESCO, QESCO, GEPCO, SEPCO, and PESCO. Upload any utility bill PDF and we read the units and amount automatically. You can also enter values manually if you don't have the bill on hand.