Verified LESCO / IESCO Tariff Engine
Solar Savings & System Sizing Calculator
Estimate your recommended system size, monthly electricity bill reduction, payback period, and 25-year financial ROI in seconds.
1. Monthly Bill Input
Step 1 of 2
PKR 35,000
PKR
PKR 5k
PKR 50k
PKR 100k
PKR 250k+
Quick Select:
Includes standard fuel price adjustment (FPA), surcharges, and taxes.
Estimated Monthly Consumption
745 Units / month
Calculated via multi-slab progressive LESCO/IESCO tariff curve.
Step 2 of 2
Recommended System
8 kW Package
Price: PKR 1,869,900
Monthly Generation
920–1,050 Units
@ 4.8 Peak Sun Hours
Estimated Payback
3.76 Years
25-Yr System Life
Cumulative Long-Term ROI Projection
Includes 8% annual grid electricity tariff escalation compounding.
1 Year
5 Years
10 Years
15 Years
25 Years
Projected Cumulative Bill Savings
PKR 2,428,000
Net financial return after recovering turnkey capital cost.
System Sizing & Appliance Load Profiler
Size your solar setup by either target bill offset percentage or by your exact appliance inventory.
PKR
Recommended Package
8 kW Package
Official Package Price
PKR 1,869,900
Monthly Savings
PKR 41,472 / mo
| Appliance | Avg Wattage | Quantity | Daily Hours | Daily kWh |
|---|---|---|---|---|
| 1.5 Ton Inverter AC | 1,200 W | 19.20 kWh | ||
| Refrigerator / Deep Freezer | 125 W | 3.00 kWh | ||
| Ceiling Fans (Standard/Inverter) | 75 W | 5.40 kWh | ||
| LED Lights & Fixtures | 12 W | 0.72 kWh | ||
| Water Pump / Motor | 1,000 W | 1.00 kWh |
Total Daily Load
29.32 kWh / day
Recommended Package
8 kW Package
SolarLink Estimate #SL-2026-ONLINE
Your Solar System Quotation
Package
10.2 kW Package
Hybrid with Battery
Turnkey Package Price
PKR 2,322,000
Verified Flyer Price
Monthly Savings
PKR 51,525
At current slab rates
Simple Payback
3.76 Years
25-Yr System Life
Official Package Deliverables & Equipment Specs
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Frequently Asked Questions About Solar Sizing & Tariffs
How does this calculator estimate my monthly units from bill amount?
In Pakistan, residential electricity tariffs use progressive slabs (e.g. 1-100 units, 101-200, 201-300, 301-700, and 700+ units). Our calculator factors in standard base tariffs, fuel price adjustments (FPA), and DISCO surcharges to model the true unit consumption corresponding to your bill.
What does Peak Sun Hours (PSH) mean?
Peak Sun Hours refers to the equivalent number of hours per day when solar irradiance equals 1,000 W/m². Across Punjab (Lahore, Islamabad, Rawalpindi, Sargodha, Multan), Pakistan enjoys between 4.8 and 5.4 peak sun hours daily, producing roughly 115–125 kWh per kW installed each month.
How does net metering help shorten my payback period?
With bi-directional net metering, any surplus electricity your system generates during daytime is exported to the grid and credited against your off-peak night consumption. This eliminates peak grid charges and typically reduces the capital payback period to under 4 years.
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Our certified engineers will inspect your roof structure, orientation, shading, and electrical distribution board to generate a 100% customized CAD layout and guaranteed proposal.