How much energy does a home solar system produce per year?

As an orientative figure, a home rooftop system produces around 900 to 1,300 kWh per year for every kW of installed capacity, in many parts of Europe. So a common 5 kW system might yield roughly 4,500 to 6,500 kWh a year. These are estimates, not promises. Your real output depends on where you live, how the roof faces, and the weather that particular year.

What affects how much you get?

Three things matter most. Size sets the ceiling, since more panels mean more potential energy. Orientation and tilt decide how much sunlight actually reaches the panels, with south-facing roofs usually performing best in the northern hemisphere, and east or west facing roofs producing somewhat less. Region matters because sunnier areas simply receive more solar energy across the year.

• System size in kW sets the maximum potential output.
• Orientation and tilt: south usually best, east and west a bit lower.
• Region and local climate: more sun means more kWh.
• Shading, dust and roof angle can shift the real number up or down.

How do you get a figure for your own roof?

A rough estimate is easy, but a reliable one needs a proper look at your specific roof, address and consumption. A professional energy assessment models your orientation, tilt and local sunlight, then estimates annual production and how much of it you could actually use. SunVolt Club includes exactly this kind of assessment, with a report delivered in 48 hours, so you start from your numbers, not a generic average.

The honest way to read any production figure is as a guide, not a guarantee. Use the orientative range to see if solar makes sense for you, then let a tailored assessment sharpen it into a number you can plan around.