The booming Photovoltaic DC Distribution Box market is projected to reach $4. Explore market size, CAGR, key players (Weidmüller, ABB, Schneider Electric), and regional trends in this in-depth. A Photovoltaic Distribution Box, also known as a PV distribution box or solar combiner box, is an essential component in a photovoltaic (PV) system that helps manage the electrical connections and distribution of power generated by solar panels.