Source: freesunpower.com
Below are typical wiring layouts and various components of solar energy systems in 3 common sizes: 2 KiloWatts, 4 KiloWatts, and 8 KiloWatts. These system sizes are based on 100 watt solar panels and 5 hours of average daily sunshine.
2kW off grid solar system
4kW off grid solar system
8kW off grid solar system
These diagram examples could represent 12, 24, or 48 volts systems. The basic wiring configuration would be the same for any voltage system. These diagrams are meant to give a general idea of typical system wiring. Certain grounding and fusing circuits have been omitted from the wiring diagrams for clarity.
