Domestic PV Generation Estimator

Are your solar panels still performing to their potential? Compare your system's performance with our estimate from current weather data sourced from Open-Meteo.

Location

Tilt (°) ? How steeply your panels are angled 0° is horizontal and most residential roofs are around 20-40°.

Azimuth (°) ? The compass direction your panels face: 0°=south, -90°=east, 90°=west, ±180°=north. In the northern hemisphere, south-facing (0°) usually gets the most sun; in the southern hemisphere it's usually north-facing (±180°).

System hardware

Panel wattage (W each) ? The panel's rated power at Standard Test Conditions (STC) and a -0.35%/°C temperature coefficient.

Number of panels

Inverter rated output (W, whole system) ? The inverter's maximum continuous AC output. Assumes 96% inverter efficiency.