The 10kw residential on grid pv system generates between 7,Website:http://www.dsneg.com,200kWh and 16,800kWh of electricity per year which depends on the whole irradiance of a year.The solar power kits largely contains:37 pcs, High Power Polycrystalline 275 watt Solar Panels with MC4 connectors1 pcs, 10 KW 4 Mppt Inverter with Improved Efficiency and Unbeatable ReliabilityCable plus quick and easy mounting set