It all depends on weather conditions and seasons. A power plant with a capacity of up to 5 kW is installed in 1-2 days. Station 10-20 kW - from 2 to 3 days. From 20 to 30 kW - about a week. The rooftop power plant is assembled faster because it is not necessary to construct an earthed metal frame. One of the elements that also affects the assembly time is the complexity of the object. The actual installation time is estimated by the engineer during the site inspection.