The free solar calculator built for Pakistan
SolarEstimateOnline is a free solar estimate online tool built specifically for Pakistani households and businesses. Enter your monthly electricity bill or upload a WAPDA, K-Electric, IESCO or LESCO statement, and the solar calculator Pakistan sizes a rooftop system, projects your savings, and tells you when it pays for itself — no signup, no callback, no email gate.
Why solar makes sense in Pakistan right now
Residential electricity tariffs in Pakistan have climbed sharply since 2022. Upper-slab consumers now pay PKR 45–65 per unit across most DISCOs once fuel cost adjustments, quarterly tariff adjustments, and additional surcharges are layered in. Summer bills of PKR 25,000–80,000 are routine for any home running 2–4 air conditioners. At the same time, installed solar costs have fallen by roughly 35% since 2021 — a 5 kW system that cost over PKR 1.2 million in 2021 now installs for around PKR 850,000–1,100,000 in 2025.
That combination — rising grid tariffs, falling panel prices, and a NEPRA-regulated net metering programme — has compressed solar payback in Pakistan to under four years for most homes. For higher-tier residential users (700+ units/month) and small commercial customers, payback now lands inside three years. SolarEstimateOnline's solar ROI calculator quantifies this against your specific bill and city.
How the solar estimate online tool works
The calculator uses a transparent, three-step sizing model based on your real consumption and your city's solar profile. Every assumption — installed cost per kW, peak sun hours, system efficiency, tariff escalation, panel degradation, net-metering buyback rate — is configurable from the settings page, so you can override defaults to match a specific installer quote.
- Tell us your usage. Upload a bill PDF (WAPDA, K-Electric, LESCO, IESCO, MEPCO, FESCO, HESCO, QESCO, GEPCO, SEPCO, or PESCO), or enter your monthly bill amount in PKR, monthly units (kWh), and city.
- We size the system. The solar panel calculator divides your monthly units by your city's peak sun hours, system efficiency, and 30 days to compute kW. Panel count is rounded up to whole 550 W panels and roof space is computed at ~20 sq ft per panel.
- You see payback. Monthly savings are capped at your real bill, lifetime savings compound with tariff escalation (6%/year) and panel degradation (0.6%/year), and the calculator reports payback in years and a 25-year ROI projection.
Tuned for every major Pakistani city
Karachi, Lahore, Islamabad and Rawalpindi sit at different latitudes with different DISCO tariffs and slightly different sun-hour profiles. The calculator localises every estimate using city-specific defaults:
- Solar estimate Karachi — K-Electric tariff customers, ~5.4 peak sun hours/day, average residential bill around PKR 28,000.
- Solar estimate Lahore — LESCO tariff customers, ~5.1 peak sun hours/day, average residential bill around PKR 25,000.
- Solar estimate Islamabad — IESCO tariff customers, ~5 peak sun hours/day, average residential bill around PKR 22,000.
Solar system pricing in Pakistan (2025)
Looking for current solar prices? We maintain dedicated solar system price Pakistan reference pages with installed-cost ranges, panel counts, generation estimates, and net-metering eligibility:
- 5kW solar system price Pakistan — PKR 850,000 to 1,100,000 fully installed, 2-3 bedroom homes, 1-2 ACs, monthly bills around PKR 25,000–40,000.
- 10kW solar system price Pakistan — PKR 1,550,000 to 1,950,000 fully installed, Larger homes (4-5 bedrooms), 3-4 ACs, small offices, monthly bills PKR 50,000+.
Net metering in Pakistan: what changed and what it means
NEPRA's 2024–25 tariff revision dropped the net metering buyback from around PKR 21–27/unit to roughly PKR 10/unit for new connections. That single change makes correctly sized systems much more important than oversized ones. Exporting excess units back to K-Electric, IESCO or LESCO at PKR 10 while paying PKR 50+ for the same unit at night is not the deal it once was.
The net metering calculator Pakistan inside this tool sizes a system that maximises self-consumption first and exports surplus second — the configuration that pays back fastest under current NEPRA rules.
Why this calculator is different
- Pakistan-first. Defaults are tuned to Pakistani tariffs, costs in PKR, and DISCO-specific net metering rules — not generic U.S. or Indian assumptions.
- Bill upload that actually works. Upload any WAPDA-style PDF or K-Electric bill — the calculator extracts your units and bill amount automatically.
- Transparent assumptions. Every constant (installed cost, sun hours, tariff escalation, buyback rate) is visible and editable from the settings page. No hidden fudge factors.
- Local privacy. Every calculation runs in your browser. Your bill, address, and consumption data never leave your device — no analytics on your input, no email signup, no callback.
- Free and unlimited. Run as many estimates as you want. Save history locally. Compare 5 kW, 7 kW, 10 kW configurations. Export a PDF of your estimate.
Ready to size your solar system?
Whether you're tired of WAPDA bills creeping past PKR 30,000, planning ahead for next summer's load, or shortlisting installers, the fastest way to know what solar will do for you is to run the numbers against your own bill.