I have a 5kW system at my place, had it for over 2 years, great system. Purchased from Energy Matters. It has a 5kW Sunnyboy Explorer inverter. Whisper quiet and so far haven't had any issue with it. Your panels/installation will never drive your inverter to maximum if properly installed. A 5kW inverter will handle 5kW when running at its maximum without any trouble. It is not like a regular electrical system where you have to over compensate to allow for stresses. The panels will actually generate less on a hot sunny day, than a cooler sunny spring day. Air temps have a big say in how efficient the panels operate.
