Design and installation with consultants and specialists for home and residential projects with back up time depends on the client’s needs. Residential systems are typically compact, designed to maximise energy production within a limited space without being overly intrusive. An average residential solar system might range from 6 to 100 kW, depending on the household’s energy needs and roof space. The diagram is a simple system that designed for some projects needs single phase systems and three phase systems with different capacities depending on the site inspections .