SolarEstimate

Solar Savings Calculator for Pakistan

See exactly how much money solar will save you. Enter your monthly bill and the calculator projects monthly savings, annual savings, and 25-year lifetime savings — accounting for Pakistan's tariff escalation and net metering rules.

Start the calculator See 5kW system price

What "savings" actually means with solar in Pakistan

Solar savings in Pakistan come from three places: units you generate and consume directly (offset at your full tariff slab, currently PKR 45–65/unit in upper slabs), units you export to the grid (credited under NEPRA's net metering programme at roughly PKR 10/unit), and avoidance of future tariff hikes (effective tariffs have risen 80%+ since 2021, and continued escalation is priced into the calculator).

How the solar savings calculator works

The solar savings calculator takes your monthly bill and units and computes savings in three time horizons:

  • Monthly savings = units offset × your tariff slab, capped at your real bill. This is what disappears from your next K-Electric / WAPDA bill once solar is live.
  • Annual savings = monthly savings × 12. This is the figure most installers quote.
  • 25-year lifetime savings = annual savings compounded with 6% tariff escalation and reduced by 0.6%/year panel degradation.

The 25-year number is the most important one for comparing solar against other investments. For a typical 5kW residential system in Pakistan, lifetime savings come out to PKR 4–7 million — multiples of the original installed cost.

Why your savings depend on your tariff slab

Pakistan's residential tariff is slab-based: the first 100 units are cheap (protected slab), 100–300 units are mid-priced, and units above 300/700 jump sharply. A high-tier consumer (700+ units/month) saves PKR 60+ per offset unit, while a low-tier consumer (under 100 units) saves only PKR 7–15 per unit. The calculator factors your slab automatically — that's why your bill input matters as much as your unit input.

Net metering credits and savings

Under the 2024 NEPRA notification, surplus solar exported to your DISCO is credited at about PKR 10/unit. The calculator factors net metering into your savings but doesn't oversize the system to chase export credits — at the new buyback rate, every additional kW you add for export only earns you ~PKR 10/unit instead of the ~PKR 50/unit you save on self-consumption.

The optimal system, under current rules, offsets your evening and night usage via self-consumption during the day plus stored generation (if you have a battery), and exports only modest surplus. The net metering calculator models this trade-off explicitly.

What savings don't include

The calculator doesn't include savings from rooftop temperature reduction (real but hard to quantify), reduced wear on your inverter AC compressors from softer voltage profiles, or any value attached to insulating yourself from future tariff shocks. Treat the calculator's lifetime savings number as the floor, not the ceiling.

Solar savings calculator FAQs

How are solar savings calculated?
Solar savings = (monthly units offset × your tariff per unit) + (surplus exported × net metering buyback rate). The calculator caps savings at your actual bill — solar can't pay you negative. Lifetime savings also account for annual tariff escalation (typically 6%) and panel degradation (~0.6%/year).
Will my electricity bill really go to zero with solar?
For most residential customers, yes — or very close to it. A correctly sized system offsets the majority of your slab consumption, and net metering credits handle the rest. You'll still pay fixed meter charges and any minimum demand charges, which typically total a few hundred rupees.
How much can I save with solar over 25 years?
On a typical 5kW residential system in Pakistan, 25-year lifetime savings come out to PKR 4–7 million after accounting for tariff escalation and panel degradation. A 10kW system can save PKR 8–14 million over the same period.
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.