How does the SNM Solar Calculator estimate my system size in Pakistan?

The calculator uses your monthly electricity bill or average units to determine your daily kWh consumption. In Pakistan, 1kW of solar capacity generates roughly 120–140 kWh (units) per month under optimal azimuth and tilt. The calculator factors in LESCO/DISCO tariff slabs, Fuel Price Adjustments (FPA), and peak summer vs winter yields to suggest the optimal system size.

What is the payback period for a residential solar system in Pakistan?

Due to recent electricity tariff hikes in Pakistan (with protected and unprotected slabs reaching Rs 60–75 per unit with taxes and FPA), typical on-grid and hybrid systems achieve full financial payback within 2.3 to 3.2 years through LESCO/NEPRA net metering.

How much roof space is required for a 10kW solar system?

Modern Tier-1 TopCon solar panels (580W–610W) require approximately 60–70 square feet per kilowatt. A 10kW installation requires about 600 to 700 square feet of shadow-free rooftop space. SNM Solutions also provides elevated mounting structures to preserve 100% usable rooftop living space.

Smart Sizing & ROI Engine

Solar System Sizing & Bill Savings Calculator

Select your monthly electricity bill to calculate required kW system capacity, monthly units generated, net savings, and estimated payback period in Pakistan.

Your Average Monthly Bill Rs 75,000

Rs 15,000 Rs 200,000 Rs 400,000+

Estimated Monthly Units (kWh) ~1,100 Units

200 kWh 2,500 kWh 5,000+ kWh

Select System Type

☀️ + 🔋 Hybrid Solar
Net-Metering + Battery Backup

☀️ On-Grid Only
Maximum Bill Slash (Zero Grid)

💡 Prosumer Insight: With Pakistani residential peak tariffs reaching Rs 65+ per unit with taxes and FPA, solar systems with LESCO/NEPRA net metering deliver full financial payback in under 3 years.

Recommended System Size

10 kW

~17 × 580W Tier-1 TopCon Modules

Monthly Generation

~1,250 kWh

Estimated Monthly Savings

Rs 72,000

Annual Bill Savings

Rs 8.64 Lakh

Estimated Payback

~2.7 Years

Roof Space Required

~650 Sq Ft

Recommended Battery

15 kWh LiFePO4

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Includes free site survey, shading analysis & turnkey net-metering support.

Frequently Asked Questions

Common Solar Sizing & Payback Inquiries

How accurate is this solar calculation?

This calculator is calibrated using real empirical yield data from over 7,000 SNM installations across Punjab and Sindh. It reflects the average generation of Tier-1 N-Type TopCon panels under Pakistan solar insolation (approx 4.5 peak sun hours daily).

What is the difference between On-Grid and Hybrid?

On-Grid systems export excess solar power to LESCO/DISCO via a bidirectional green meter, drastically reducing bills to zero or credit. Hybrid systems add high-cycle LiFePO4 lithium batteries to also power heavy air conditioners during grid outages and overnight.

What equipment does SNM Solutions install?

We only install Bloomberg Tier-1 bifacial panels (Longi, Jinko Solar, Canadian Solar) paired with high-efficiency inverters (Solis, Huawei, Growatt, Deye) and heavy-duty hot-dip galvanized mounting structures engineered to withstand extreme winds.

Does SNM handle NEPRA net-metering approvals?

Yes. SNM Solutions provides end-to-end turnkey service including DISCO application filing, load extension (if needed), electrical inspector NOC, green meter procurement, testing, and commissioning.