Solar Annual Production Calculator
Estimate the annual energy production of your solar system.
About the Solar Annual Production Calculator
The Solar Annual Production Calculator is a free, private tool that runs entirely in your browser — your inputs never leave your device, and the answer appears the instant you enter them.
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 Annual Production 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.
The Solar Annual Production Calculator is one of a large, connected suite of Pakistani calculators on GuruAlpha, so if a related figure comes up next, the tool for it is a click away.
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
How much energy does a 5 kW solar system produce?
A 5 kW system in Lahore (4.7 PSH) produces about 6,860 kWh per year — roughly 19 kWh/day, enough to cover a 3–4 bedroom home.
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.