Enter a few details about your system — in a moment you'll see how it compares to the expected output for your location.
Search for an address, click the map, or drag the pin onto your roof.
Click the map or drag the pin to the exact spot.
The terrain horizon (hills, distant buildings) is already included in the expected output for your address. But we can't detect nearby shading — trees, a neighbouring house, a chimney — from the model; judge that on site.
The slider goes up to 30 kWp — enter larger systems as a number.
Drag to tilt the roof, or type the degrees. If you're not sure, estimate — or switch to "unknown tilt". With unknown tilt we use the optimal tilt for your location.
Rotate to where the panels face (which compass direction they look toward). If unsure, switch to "unknown orientation". With unknown orientation we use the optimal orientation for your location. More than one roof facing different ways? Enter the main one — a per-segment breakdown is coming.
Found in your inverter's app, usually as "total yearly yield". Mind the unit: it's in kWh, not MWh (10.4 MWh = 10,400 kWh).