System size in kW
Convert monthly bill units into a starting solar capacity using city-specific peak-sun hours and a 75% planning performance ratio.
Free bill, system size, price, and net billing calculator
Solar Calculator Pakistan: System Size, Cost & Savings
Use your electricity bill or monthly units to estimate solar system size, panel count, 3 kW to 20 kW price range, monthly generation, savings, payback, and 2026 net billing impact for your city and DISCO.
City and DISCO-aware estimates2026 net billing assumptionsNo login or phone number requiredInstaller quote checklist included
Free, no login, 30 seconds
Start with your bill and get practical numbers.
The full calculator opens with your bill and city values so you can review system size, price range, savings, payback, and financing scenarios.
One estimate, six buying decisions
What the Pakistan solar calculator actually calculates
The result is designed to be a planning brief you can compare with installer quotations, not a single headline saving number.
Solar system cost
Compare planning ranges for on-grid, hybrid, and off-grid systems instead of treating every installer quote as the same scope.
Panels and roof fit
Translate the recommended kW into an approximate panel count, then check whether shade-free roof area can support the layout.
Monthly generation
Estimate kWh production from system size, city sunlight, and real-world system losses rather than panel nameplate power alone.
Savings and payback
Separate electricity used directly at the property from lower-value exports before calculating annual savings and simple payback.
Cash or bank financing
Compare upfront cost with down payment, monthly instalment, tenure, and indicative Islamic financing scenarios.
Why bill amount alone is not enough
A rupee bill includes more than energy: tariff slabs, taxes, fuel adjustments, fixed charges, and arrears can all affect the total. If your bill shows monthly units, use those kWh for the best starting estimate. The calculator can still convert a bill amount when units are unavailable, but it labels that conversion as an assumption so you can check it before requesting a quote.
Solar sizing also depends on when electricity is used. A home that runs air conditioners, pumps, laundry, or office equipment during solar hours can use more generation directly. A home with mostly evening consumption may export at midday and buy electricity back later at a different rate. That is why this calculator keeps generation, self-consumption, exports, and imports conceptually separate.
2026 price benchmarks
Solar system price calculator for 3 kW to 20 kW
These hybrid-system planning ranges use the same benchmark model as the calculator. Battery capacity, equipment grade, roof work, taxes, and installer scope can materially change the final quote.
3 kW
Home starter
- Price range
- Rs. 460K - Rs. 540K
- Monthly savings
- Rs. 10,168
- Modelled generation
- 365 kWh/mo
Home starter
- Price range
- Rs. 760K - Rs. 910K
- Monthly savings
- Rs. 16,938
- Modelled generation
- 608 kWh/mo
Family home
- Price range
- Rs. 1.06M - Rs. 1.27M
- Monthly savings
- Rs. 23,708
- Modelled generation
- 851 kWh/mo
Family home
- Price range
- Rs. 1.52M - Rs. 1.82M
- Monthly savings
- Rs. 33,848
- Modelled generation
- 1,215 kWh/mo
Commercial load
- Price range
- Rs. 2.28M - Rs. 2.72M
- Monthly savings
- Rs. 50,786
- Modelled generation
- 1,823 kWh/mo
Commercial load
- Price range
- Rs. 3.04M - Rs. 3.63M
- Monthly savings
- Rs. 67,696
- Modelled generation
- 2,430 kWh/mo
Savings examples assume 55% direct self-consumption, Rs. 44/kWh avoided retail value, and Rs. 8.13/kWh export credit. Use the full calculator to replace these planning values with your bill, city, system type, and financing choice.
Bill units to system size
How many kW and solar panels does a home need?
The table shows modelled monthly generation at 5.4 peak-sun hours per day and a 75% performance ratio. Panel count uses a 650 W reference module.
| System size | Approx. 650 W panels | Modelled generation | Typical planning use |
|---|---|---|---|
| 3 kW | 5 panels | 365 kWh/mo | Home starter |
| 5 kW | 8 panels | 608 kWh/mo | Home starter |
| 7 kW | 11 panels | 851 kWh/mo | Family home |
| 10 kW | 16 panels | 1,215 kWh/mo | Family home |
| 15 kW | 24 panels | 1,823 kWh/mo | Commercial load |
| 20 kW | 31 panels | 2,430 kWh/mo | Commercial load |
Use the table as a sanity check, not a purchase order
A 5 kW label does not guarantee the same output on every roof. Lahore, Karachi, Islamabad, Multan, and Peshawar have different sunlight assumptions, while shade, panel orientation, dust, high temperature, cable losses, and inverter clipping can reduce production. Panel count also changes with module wattage: lower-wattage panels require more roof area for the same target capacity.
Final sizing should check at least twelve months of electricity units, sanctioned load, daytime demand, phase type, roof dimensions, shade, inverter limits, and planned future loads such as another air conditioner or an electric vehicle. If an installer recommends a much larger system than your annual load can justify, ask how much energy the design expects you to export and what rate was used.
Choose the right architecture
On-grid vs hybrid vs off-grid solar in Pakistan
System type affects price, backup, usable energy, export treatment, and maintenance. Compare the operating goal before comparing total cost.
| System type | Best suited to | Battery | Main trade-off |
|---|---|---|---|
| On-grid solar | Homes and businesses with reliable grid supply and strong daytime use | Not normally included | Lowest starting cost, but standard systems do not provide backup during an outage |
| Hybrid solar | Properties that need solar savings plus selected-load backup | Optional or included by design | More flexible, with higher inverter and battery cost than on-grid |
| Off-grid solar | Remote sites or loads that cannot depend on a utility connection | Essential | Highest storage requirement; size for worst-month energy and surge loads |
Need the detailed comparison?
Compare system types Review outage behaviour, batteries, export logic, and quote questions before selecting an inverter type.
Transparent method · reviewed August 7, 2026
How the solar estimate is calculated
Every result can be traced back to a small set of visible assumptions. This makes it easier to challenge an optimistic quote or update the estimate when tariffs change.
Monthly electricity use
monthly kWh = bill amount ÷ blended tariffUse the units printed on your bill whenever possible; the rupee conversion is only a fallback estimate.
Recommended solar capacity
kW = monthly kWh ÷ (30 × peak sun × 0.75)The result rounds up to a practical capacity so normal system losses are not ignored.
Monthly solar generation
kWh = kW × peak sun × 30 × 0.75The 75% performance ratio is a planning allowance for heat, wiring, inverter, mismatch, and operating losses.
Monthly solar savings
(self-used kWh × retail value) + (exported kWh × export rate)The default model values direct use at Rs. 44/kWh and 2026 exports at Rs. 8.13/kWh.
What the estimate deliberately does not promise
The calculator does not replace a structural survey, shade study, licensed electrical design, DISCO approval, or an itemized installer quote. It also does not guarantee a tariff, export credit, annual generation, battery life, or payback period. Its purpose is to turn your bill into a consistent planning baseline and make hidden assumptions visible before money changes hands.
2026 billing rules
How net billing changes solar savings
For new solar planning, the important question is whether imported and exported units have the same rupee value. This section explains the policy and payback implications.
Self-consumed solar usually has the highest value
When solar powers a load inside the property, it avoids an imported unit at the applicable retail value. When surplus is exported, the credit follows the billing mechanism in the prosumer agreement. Under Pakistan's 2026 framework, the model should not assume simple one-for-one cancellation at the retail tariff.
The official NEPRA decision for calendar year 2026 states a national average energy purchase price of Rs. 8.13/kWh. This calculator uses that as the default export-credit benchmark while keeping the retail value separate. Existing agreements, later amendments, and individual DISCO treatment should be verified from the agreement and current bill.
How to improve payback under net billing
Size the system around realistic daytime use instead of filling every available part of the roof. Shift controllable loads—such as pumps, laundry, cooling, office work, and vehicle charging—into solar hours where practical. Compare battery cost against the value of backup and extra self-consumption rather than counting a battery as free savings.
Ask every installer proposal to show projected generation, direct self-consumption, exports, imported units, retail tariff, export rate, and annual degradation on separate lines. If the payback only works when every generated unit is valued at a high retail rate, the estimate is not modelling net billing conservatively.
Pick a calculator
Go directly to the estimate you need
Each tool is focused on a common question: meter readings, system size, financing, panel prices, or battery backup.
Free online solar calculator
Estimate system size, cost, savings, payback, and net billing online from your bill, units, or appliance load.
OpenNet metering bill calculator
Calculate a net metering bill from import/export readings, rates, charges and carried credit.
OpenBank financing calculator
Compare down payment, tenure, EMI, and Islamic bank profit scenarios.
OpenPanel price comparison
Review Pakistan panel brands by wattage, efficiency, warranty, and price range.
OpenBattery backup comparison
Compare lithium battery usable kWh, backup hours, cycles, and lifetime cost.
OpenHow it works
From electricity bill to defensible solar brief
01
Enter your bill
Use monthly rupees or units, then select your city so the model can apply DISCO and sun-hour assumptions.
02
Review system size
Compare on-grid, hybrid, and battery-backed estimates before shortlisting installers.
03
Use the quote checklist
Check panels, inverter, structure, protection, filing charges, warranty, and after-sales support.
After you calculate
Use the result to compare solar quotations line by line
A low total price can hide a smaller inverter, fewer protections, weaker structure, limited warranty, or excluded application work.
- 01
Match the quoted panel brand, model, wattage, quantity, and product warranty.
- 02
Confirm the exact inverter model, AC/DC rating, MPPT layout, monitoring, and local warranty process.
- 03
Ask for structure gauge, wind loading, waterproofing method, cable sizes, earthing, breakers, and surge protection.
- 04
Separate battery capacity, usable kWh, depth of discharge, cycles, and backup loads from the solar-savings claim.
- 05
Confirm who handles the DISCO application, bidirectional meter, drawings, inspections, and every filing charge.
- 06
Compare quotes on the same scope and keep a written commissioning, handover, and after-sales checklist.
Shortlisting installers?
Review installer checks Review the safety and verification checklist before sharing your roof, bill, or project details.
City-by-city
Solar calculator pages by city and DISCO
Solar output changes by city, roof exposure, and DISCO assumptions. Start with the closest city page for local planning notes.
LahoreLESCO5.3 peak-sun hrs/dayKarachiK-Electric5.8 peak-sun hrs/dayIslamabadIESCO5.1 peak-sun hrs/dayRawalpindiIESCO5.1 peak-sun hrs/dayFaisalabadFESCO5.4 peak-sun hrs/dayMultanMEPCO5.7 peak-sun hrs/dayGujranwalaGEPCO5.2 peak-sun hrs/dayPeshawarPESCO5 peak-sun hrs/dayHyderabadHESCO5.9 peak-sun hrs/daySukkurSEPCO6.1 peak-sun hrs/day
Example calculations
Common solar planning scenarios by city
Review clean city guides for common system sizes, then use the online calculator with your own bill, load, roof, and financing inputs.
3 kW hybrid solar exampleLahore · residential backup5 kW on-grid solar exampleKarachi · daytime savings7 kW hybrid solar exampleIslamabad · solar plus backup10 kW hybrid solar exampleFaisalabad · higher household load5 kW off-grid solar exampleMultan · battery-led planning8 kW hybrid solar examplePeshawar · city-specific output
Read first
Pakistan solar buying guides for 2026
September 19, 2026
Solar inverter price in Pakistan: 3 kW to 15 kW guide
A current, source-checked guide to inverter prices, types, sizing, MPPTs, batteries, warranties, and the exact questions to ask before paying an installer.
Read guide
August 8, 2026
MCB solar financing calculator and eligibility guide
Estimate an MCB Islamic solar payment, then verify the official PKR 20 million limit, minimum contribution, tenure, eligibility, and required documents.
Read guide
August 7, 2026
Solar panel prices in Pakistan: how to read per-watt quotes
A low Rs/W number is not automatically a good deal. Learn how to compare panel-only rates, total DC watts, warranty, serial verification, and full installed system scope.
Read guide
May 8, 2026
Net billing in Pakistan: how exports, imports, and payback now work
Imported units and exported units no longer have the same cash value for new prosumer connections. This guide shows the 2026 payback logic before you sign a solar quote.
Read guideSolar calculator questions
Answers about sizing, prices, panels, and net billing
How does the solar calculator estimate system size?
It divides your average daily electricity use by the selected city's peak-sun hours and a 75% planning performance ratio, then rounds up to a practical system size. A roof survey and load check are still required before purchase.
Can I calculate solar from my electricity bill?
Yes. Enter either the rupee amount from a recent bill or your monthly kWh units. Units give the cleaner starting point because tariffs, taxes, fuel adjustments, and fixed charges can change the relationship between bill value and energy use.
How many solar panels do I need for a home in Pakistan?
Panel count depends on system size and panel wattage. As a simple example, a 5 kW target needs about eight 650 W panels, while a 10 kW target needs about sixteen. The final string layout must match inverter limits, shade, and usable roof area.
Does the calculator support net metering and net billing?
Yes. It models direct self-consumption and exported energy separately. For new 2026 planning, exports use an NAEPP-based credit rather than assuming every exported unit cancels an imported unit at the same retail value.
What is the 2026 solar export rate used here?
The current default is Rs. 8.13 per kWh, matching NEPRA's national average energy purchase price decision for calendar year 2026. Confirm the rate and treatment shown on your own DISCO agreement and bill before making an investment decision.
Is on-grid, hybrid, or off-grid solar better?
On-grid usually has the lowest upfront cost, hybrid adds backup flexibility, and off-grid is designed for independence from the utility. The best choice depends on outage tolerance, daytime load, battery budget, and whether export approval is available.
Are the solar prices and savings guaranteed?
No. They are planning estimates based on stated market, tariff, sunlight, loss, and self-consumption assumptions. Equipment selection, taxes, roof work, battery size, shade, weather, installation quality, and tariff changes can move the final result.
Which Pakistan cities and DISCOs are covered?
The calculator includes Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Gujranwala, Peshawar, Hyderabad, Sukkur, Quetta, Bahawalpur, Sialkot, and Sargodha with relevant DISCO and peak-sun assumptions.
Is the Pakistan solar calculator free?
Yes. It is free to use, requires no login, and does not ask for a phone number before showing the estimate.
About this resource
Built to make Pakistan solar quotes easier to audit
SolarCalculator.com.pk publishes independent planning tools and buyer education for Pakistan homes and businesses. The calculator combines user inputs with documented city sunlight, system-loss, market-price, tariff, self-consumption, and export-credit assumptions. It does not sell equipment, guarantee installers, or replace professional electrical and structural advice.
Last methodology review: August 7, 2026. Regulatory assumptions were checked against NEPRA's 2026 Prosumer Regulations and CY 2026 energy-purchase-price decision. Market prices remain estimates and should be checked against current, itemized quotations.