The everyday system: two to four outdoor cameras covering the gate, the approach and the parking, and two to four indoor cameras on the counter, the staircase and the store room. A DVR with a surveillance-grade disk keeps 30 days of footage, and your phone shows live view and playback from anywhere.
Survey to commissioning in 7 to 12 working days for a typical rooftop.
25 years on modules, 5 to 10 on the inverter, 5 years workmanship.
12 months free maintenance, then an AMC with two preventive visits a year.