15 Dec 2025
How to Connect a PV Combiner Box?
Practical applications are used to illustrate how to avoid common mistakes. The core purpose of a PV combiner box is to aggregate the DC output from multiple PV array strings into one or more outputs, enabling stable transmission to the inverter. This blog begins with the structure of a PV combiner box, progressively explaining the wiring methods for PV arrays, the connection sequence of DC protection devices, and grounding approaches. Practical applications are used to illustrate how to avoid common mistakes.