Basic: 100A indoor replacement — Panel, new breakers, basic wiring; 6–8 hours; total $1,200–$2,000; includes standard permit where required. Modernizing a distribution board involves replacing, expanding, or upgrading the electrical distribution board in your home or business premises. Modern applications such as solar panels. Inspection and testing in accordance with NEN1010: Perform a thorough check and test whether all protections are functioning correctly. During renovations, questions always arise about capacity, future-proofing, and regulations.