Solar Degradation Calculator
See how solar panel output degrades each year over the system's life.
About the Solar Degradation Calculator
The Solar Degradation Calculator gives you a clear, instant answer to a question that usually means digging through tables or guessing — enter your numbers and read the result straight away.
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 Degradation 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.
Bookmark the Solar Degradation Calculator for the next time you need it, and explore the rest of GuruAlpha's 1,200+ calculators for related everyday maths.
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 do solar panels degrade?
Tier-1 panels lose about 0.5% per year — a 5 kW system is still ~4.4 kW after 25 years, above the typical warranty guarantee of 80–84%.
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.