Why choose 48V DC voltage instead of other voltages? Can AC power be used directly? EMI & Compatibility : AC's frequency fluctuations cause strong electromagnetic interference (EMI), disrupting communication device microcircuits. Most components are DC-native; AC use requires costly rectification/filtering, increasing complexity and losses. Efficiency & Reliability : AC systems depend on UPS with inefficient AC-DC/DC-AC conversions, high costs, and single-point failure risks (e.g., inverters). 48V DC directly uses battery packs for longer backup and modular reliability. Stability & Maintenance : AC's grid fluctuations demand complex regulation. DC delivers stable power without conversion, cutting faults and eliminating energy loss/maintenance issues from AC multi-stage setups. Why not use 24V, 36V, or other DC voltages? Balancing transmission loss and safety : Lower voltages (e.g., 24V) increase current for the same power ( P=UI ), lea...