Solar Efficiency Calculator
Calculate the efficiency of a solar panel from its power and area.
About the Solar Efficiency Calculator
Numbers should not slow you down. The Solar Efficiency Calculator does the arithmetic for you and shows the result live, so you can focus on the decision rather than the maths.
How much electricity will your solar system actually produce? The answer depends on the system size and the sun hours at your location. This Solar Efficiency Calculator estimates the monthly and annual energy production of a solar system in Pakistan.
The calculation multiplies the system size (kW) by the peak sun hours at your location and applies realistic system losses (inverter, wiring, temperature, soiling) to arrive at usable generation.
Peak sun hours vary across Pakistan: the south and Balochistan see more sun than the northern and western regions. Using your city's actual sun hours rather than a national average makes the estimate accurate.
Compare the estimated generation with your monthly consumption: if generation covers consumption, the system pays for itself through the bill savings — and with net metering, surplus generation earns credit.
Use the Solar Efficiency Calculator as often as you like — it is free, needs no account, and pairs well with the other calculators in this category for a fuller picture.
How to estimate solar production
- 1
Enter your system size in kW.
- 2
Enter the peak sun hours for your city (4.5–6 typical in Pakistan).
- 3
Adjust the system efficiency if you know your hardware's ratings.
- 4
Read the monthly and annual production in kWh, updated live.
Frequently Asked Questions
What is a good solar panel efficiency?
Monocrystalline panels run 20–23% efficient. A 550 W panel in 2.6 m² is about 21% — among the best available.
How many units does a 10 kW solar system produce in Pakistan?
With ~5 peak sun hours and typical losses, a 10 kW system generates roughly 1,200–1,400 kWh (units) per month — often enough to cover a large household's full bill.
Why is actual production lower than rated?
Real-world losses — inverter conversion (~5%), wiring (~2%), temperature derating, dust and soiling — typically reduce output by 15–25% from the theoretical maximum.