Which of the following is not a typical benefit of a dedicated solar sub-board?

• A. Minimize AC wiring length
• B. Reduce installation time
• C. Maximize installation space
• D. Increase complexity

Answer: (D)

A dedicated solar sub-board concentrates the PV AC protection and disconnects in one location, which helps organize the PV portion of the system and keeps wiring tidy and compliant. This arrangement makes sense for minimizing AC wiring length because you can place the PV-related breakers near the array or combiner, rather than running long runs to the main panel. It also tends to reduce installation time since wiring to a single sub-board is typically faster and more straightforward than routing many separate conductors to the main panel. By freeing space in the main panel and giving the PV circuits a dedicated area, installation space can be better utilized and kept clear for other circuits. Increasing complexity, on the other hand, is not a benefit; adding another panel adds components to install, wire, and maintain, which can complicate the system rather than simplify it.