48V Voltage DropCalculator
Calculate voltage drop for 48V DC systems including telecom, data centers, solar installations, and golf carts. Industry-standard calculations.
DC Circuit Parameters
Enter your system values
Total circuit length will be 2× this value
Calculation Results
Warning - Consider larger wire size
48V Applications
- •Telecom power systems
- •Data center DC distribution
- •Large solar arrays
- •Golf carts and EVs
- •PoE++ systems
- •Battery energy storage
DC Formula
I = Current (A)
R = Resistance (Ω/ft)
L = One-way length (ft)
Other Calculators
48V Voltage Drop Calculation Guide
About 48V Systems
48V DC systems are widely used in telecom, data centers, and commercial solar installations. Maintaining proper voltage at the load is critical for system performance and equipment longevity.
The NEC recommends limiting voltage drop to 3% for branch circuits and 5% total for the combination of feeder and branch circuit. For DC systems, this translates to a maximum drop of 1.4V for branch circuits.
Calculation Considerations
DC voltage drop calculations are straightforward since only resistance matters—there's no reactance to consider. The formula multiplies by 2 to account for the complete circuit (positive and negative conductors).
For 48V systems, common wire sizes range from #8 AWG for moderate loads to #2/0 AWG for high-current systems. Always verify ampacity requirements alongside voltage drop calculations.