Free Online Tool

Solar Calculator Pakistan — Estimate Your Solar System Size

Enter your electrical loads and get a preliminary solar system recommendation in minutes — for homes, offices, shops, and commercial properties in Islamabad, Rawalpindi, and across Pakistan.

Your Usage

Your Loads

Preferences

Recommendation

What are you looking to power?

Select your property type. This helps tailor the recommendation.

Home Office Shop Commercial Property Industrial

Your Electrical Loads

Add your appliances below. Change quantities, wattages, and hours to match your usage.

Appliance	Qty	Watts	Hours/Day	Daily (Wh)	Essential	Remove

⚡ Note: Appliance wattages are typical estimates. Actual consumption varies by appliance model, age, and operating conditions. Edit the wattage values to match your equipment.

Connected Load

0 W

Daily Consumption

0.0 kWh

Monthly Estimate

0 kWh

Solar System Preferences

Tell us about your city and the type of system you're interested in.

Your City * City is used to estimate local peak sun hours. Islamabad / Rawalpindi = 5.0 hrs/day (planning assumption).

What type of solar system are you interested in?

⚡

On-Grid

Reduce electricity from the grid. No battery backup included.

🔋

Hybrid

Solar + battery backup for power outages. Most popular choice.

🌿

Off-Grid

Fully independent from the grid. Suitable for remote properties.

How much backup power do you want?

Which loads should run during backup?

Essential loads only (lights, fans, fridge, Wi-Fi)

~40% of connected load

Most household loads (essential + TV, laptop)

~65% of connected load

Full load (including ACs)

~100% of connected load

Know your monthly electricity usage? (Optional)

Your Monthly Electricity Bill (kWh / Units) Found on your WAPDA/K-Electric bill as "Units Consumed".

Know your available roof space? (Optional)

Available Usable Roof Area (m²) Only count usable, unshaded area. Actual usable area may vary after site survey.

Your Solar Recommendation Is Ready

Enter your details below to view your estimated system size and get a personalised quotation from Abdul Rafay Solar Solutions.

Your Name *

Mobile Number * Pakistani mobile number. We'll contact you on this number.

City *

Email Address (Optional)

🔒 Your information is private and will only be used to provide a quotation.

Your Estimated Solar Recommendation

Recommended System
—
kW Solar PV

Estimated Panels

—

× 550 W

Daily Consumption

—

kWh / day

Monthly Consumption

—

kWh / month

Preliminary Inverter

—

kW recommendation

Approx. Roof Area

—

m² needed

Est. Battery Req.

—

kWh

Est. Daily Generation

—

kWh / day (estimate)

Your final system design should be confirmed after reviewing your electricity bills, site conditions, roof orientation, shading, available roof area, electrical connection, equipment specifications and desired backup requirements.

🔸 Panels: Example based on a W panel. Final panel selection depends on available products and site design.

🔸 Inverter: Preliminary inverter recommendation only. Final inverter selection should be confirmed by a professional after reviewing appliance starting currents, simultaneous loads, electrical infrastructure, solar array design, and equipment specifications.

🔸 Battery: Battery sizing is highly dependent on battery chemistry, manufacturer specifications, temperature, discharge limits and backup-load selection. This estimate uses a planning assumption only.

Ready to Go Solar?

Get a free, personalised quotation from Abdul Rafay Solar Solutions. 7+ years of trusted solar installation in Islamabad & Rawalpindi.

💬 Get Free Quotation on WhatsApp 📞 Call 03105060178

📍 Buland Market, Street 31, G-10/1, Islamabad

How Solar System Sizing Works

⚡ Connected Load

The sum of wattages of all appliances running simultaneously. A higher connected load means you may need a larger inverter, but doesn't necessarily mean a larger PV system.

📊 Daily Consumption

Watts × hours-per-day × quantity = Wh/day. This is the primary driver of your solar PV system size. Electricity bills reflect monthly consumption.

☀️ Peak Sun Hours

The equivalent daily hours of full-strength solar irradiance at your location. Islamabad and Rawalpindi receive approximately 5 peak sun hours per day as a planning assumption. Actual generation varies by season and weather.

🔋 Battery Backup

For hybrid and off-grid systems, battery capacity is sized based on the load you want to power during outages and the duration of backup required. Only essential loads may need backup, reducing battery cost.

🏠 On-Grid vs Hybrid vs Off-Grid

On-Grid: Reduces grid usage. No battery backup.
Hybrid: Solar + battery. Power during outages.
Off-Grid: Fully independent. Higher battery requirement.

📐 Professional Survey

No online calculator can replace a professional site survey. Shading, roof orientation, structural load, electrical infrastructure, and equipment availability all affect the final design and cost.

Common Questions

Solar Calculator FAQ

What is a solar load calculator?

How is solar system size calculated?

How many solar panels do I need?

How much roof space does a solar system require?

What is the difference between connected load and daily energy consumption?

How does battery backup affect solar sizing?

Can the calculator give an exact quotation?

Why can actual solar generation differ from the estimate?

Do I need a site survey before installing solar?

Can I use this calculator for Islamabad and Rawalpindi?

Ready for a Free Site Assessment?

7+ years of trusted solar installations across Islamabad and Rawalpindi.

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