The wiring;the guaging of the wires and the quality that depends on the resistance of the flow of current as to which the wire has to be big or Small.
The components; the charge controller, the battery,the inverter are some of the components in the construction and completion of the panel to generate electricity ,now the issue number two is the sizing of the house or the device the panel is to supply the current how am I to go about the sizing of the whole components to apply the wattage the volt and appropriate them

Hallam. ....have you been able to get the land....