Start with annual consumption
Collect twelve months of bills and note how much electricity is used during daylight hours. This establishes the useful production target.
Assess the roof
Orientation, tilt, shading, usable area, roof covering and structural condition all influence layout and mounting.
Plan for tomorrow
Include expected heat-pump, air-conditioning, battery and EV demand so the inverter and electrical design can grow with you.
Compare complete systems
Evaluate panels, inverter, protection, monitoring, mounting and documentation as one compatible system rather than isolated prices.