Solar Panel Size Calculator
Estimate solar array size, panels and battery bank.
Instant · runs in your browserAbout the Solar Panel Size Calculator
Estimate the solar system you need from your daily or monthly electricity use. The calculator suggests the array size in kW, the number of panels for your chosen panel wattage and, optionally, a battery bank for night-time use.
How it works
System size ≈ daily kWh ÷ peak sun hours ÷ system efficiency. Much of Pakistan receives around 5 peak sun hours a day on average, though it varies by season and city.
Tip
Check your last 12 months of bills to size for summer peaks, and get a site survey before buying.
سولر سسٹم کا سائز
روزانہ یا ماہانہ یونٹس سے سولر سسٹم کا سائز (kW)، پینلز کی تعداد اور بیٹری بینک کا اندازہ لگائیں۔ پاکستان میں اوسطاً تقریباً 5 گھنٹے دھوپ ملتی ہے۔
- 12 مہینوں کے بل دیکھ کر سائز طے کریں
- خریداری سے پہلے سائٹ سروے
How to use Solar Panel Size Calculator
- Enter your values. Units and defaults are shown beside each field.
- Press Calculate (results also update as you type once calculated).
- Read the result and the step-by-step breakdown with the formula used.
- Copy the result or reset to start again.
Frequently asked questions
How accurate is this calculator?
Calculations use the standard formulas shown on the page, computed in full precision and rounded only for display. The result is only as accurate as the inputs and assumptions listed.
Can I use this for engineering design?
No. These are rough quantity estimates using the assumptions shown (wastage, densities, mix ratios). Get structural and electrical work designed and approved by a qualified engineer.
Is it free?
Yes. All tools are free to use without an account.