Is my solar system underperforming?
Compare what your system makes with what it should make for your location, roof and age.
Enter production by month
Enter your location and system size to see expected production.
What's normal
Production varies with weather by 5–10% a year and falls about 0.5% a year with age. Consistent shortfalls of 20% or more usually mean a fault, new shade, or an estimate that was inflated when the system was sold.
Questions
How much should my solar panels produce?
Roughly 1,100 to 1,700 kWh per year for each kW of panels, depending on location and roof. Enter your details for a specific estimate.