Collect the field conditions
Srne starts with the details that change equipment choice: utility voltage, service panel constraints, roof orientation, battery room temperature, backup load priority and any existing PV array. This keeps the conversation grounded in what the installer will actually wire and commission. For homeowners, the same step turns a monthly bill, outage concern and roof direction into a clearer system brief. For distributors, it reduces returns caused by mismatched inverter voltage, battery communication or controller current.