Solar Calculator Pakistan – Calculate Your Solar System Size and Cost

Use the solar calculator above to work out the right solar system size for your home or business in Pakistan, and to get an indicative idea of what that system may cost. Instead of guessing, you start from your own electricity use. The calculator takes the details you already know — your monthly electricity bill, how many units you use, and the size of your house — and uses them to suggest a system that fits your needs, your roof, and your budget.

How the Solar Calculator Works

The calculator works in a few simple steps. First, choose your meter type, single phase or three phase. Then enter your average electricity bill per month and your average electricity units per month. If you have your latest bill handy, you can upload it as well, because the bill shows your actual units and helps avoid a wrong estimate. Next, add your name, phone number and email address, your house area in marla, and your full address. When you press Send, you submit those details for an estimate based on the information you entered. The more accurate the bill and units you enter, the more useful the suggested system size will be.

That is why it is worth checking a recent bill before you start, rather than entering a rough figure from memory. A bill from a summer month, when fans and air conditioners run more, can look very different from a winter bill. If your usage changes a lot through the year, use an average month, or a month that best reflects your normal use, and mention your highest month when you ask for an exact quote.

What Affects the Size of Your Solar System?

Four things matter most when the calculator suggests a system size. The first is your monthly bill and units. Your units are the clearest guide to how much electricity you actually use, and therefore how much solar generation you need to offset. A household with a high monthly bill and high unit consumption will usually need a larger system than a household with a low bill, even if the two houses look the same from the outside.

The second is roof space. The form asks for your house area in marla because panels need clear, unshaded roof area, and the number of panels that will fit depends on the space available. A larger system needs more panels, and more panels need more roof. The third is sunlight and shading. Panels produce the most when they receive direct sunlight for most of the day. A roof that is shaded by a taller building, a water tank, or a tree for part of the day will produce less from the same panels, and that has to be taken into account in the final design.

The fourth is budget. A larger system costs more up front, even though it can offset more of your bill. That is why the calculator is a starting point, not a final price list. It helps you compare system sizes and understand what each size is intended to cover, so you can choose a size that balances your monthly bill, your available roof space, and the amount you are ready to spend.

System Size Guide: 3kW, 5kW and 10kW

A 3kW system is generally suited to a smaller home with lower electricity use, where the aim is to reduce a modest monthly bill without covering very heavy loads. A 5kW system suits a medium-sized home with average to higher use, and it is a common choice for households that run fans, lights, a fridge, and other everyday appliances and want a substantial cut in their bill. A 10kW system suits a larger home, or a home with high electricity use, where a 3kW or 5kW system would leave too much of the bill uncovered.

To give a sense of scale, a 5kW on-grid system costs about Rs 510,000, and a 5kW system needs about nine panels of 590W. Panel prices in the market are in the range of Rs 36–43 per watt: Longi panels are Rs 40–43 per watt, Jinko panels Rs 39–43 per watt, JA panels Rs 37.50–40 per watt, Canadian panels Rs 40–42.50 per watt, and Trina panels Rs 38–40 per watt. GST of 10% applies on solar panels. These ranges help explain why an estimate can vary between brands and why the exact price is confirmed in a quote, rather than fixed by the calculator alone.

The guide above is only a starting point. Two homes with the same system size can still have different results, because their bills, roof space, shading, and the appliances they run are different. Use the calculator to narrow down the size, then get an exact quote for your own home before you decide.

What the Estimate Includes and Excludes

The estimate is based on the information you enter in the calculator: your monthly bill, your monthly units, your meter type, and your house area. It gives you a suggested system size, an indicative panel count for that size, and an indicative cost based on current market panel prices. It does not replace a site survey. The final size, panel layout, and price can only be confirmed after your roof, shading, wiring, and actual usage are checked.

UNVERIFIED — verify pending: whether the estimate includes installation, the inverter, the mounting structure, wiring, and net-metering charges. Those items are confirmed in your exact quote, so please check the quote carefully and ask if any item is not listed. The calculator itself does not commit you to a purchase, and it does not change any price. It is a free guide to help you understand the system size you are likely to need before you talk to Solar App about a final quote.