Daily Output = N × P × H × η
N = Number of panels
P = Panel rated power (W)
H = Sunlight hours per day
η = System efficiency (decimal)
System Efficiency (80-90%): Accounts for inverter losses, wiring losses, and panel degradation.
Temperature Derating (85-95%): Solar panels lose efficiency in high temperatures, typically 0.3-0.5% per °C above 25°C.
Solar panel output depends on several factors including panel wattage, the number of panels installed, available sunlight hours (also known as peak sun hours), and system efficiency. The rated power of a solar panel (measured in watts) represents its output under ideal laboratory conditions (Standard Test Conditions or STC). Real-world output is typically 15-25% lower due to various losses.
Peak sun hours refer to the number of hours per day when solar irradiance averages 1,000 W/m². This varies significantly by location, season, and weather conditions. Areas closer to the equator generally receive more peak sun hours than those at higher latitudes.
Disclaimer: Solar panel output calculations are estimates. Actual energy generation may vary due to weather, shading, temperature, panel orientation, and system conditions. Consult manufacturer specifications and local solar installers for precise performance projections.