24V Voltage DropCalculator
Calculate voltage drop for 24V DC systems including solar arrays, trucks, industrial equipment, and battery systems. Professional-grade calculator.
DC Circuit Parameters
Enter your system values
Total circuit length will be 2× this value
Calculation Results
Critical - Wire size too small
24V Applications
- •24V solar systems
- •Commercial trucks and buses
- •Industrial control systems
- •Telecom backup power
- •HVAC control circuits
- •Battery storage systems
DC Formula
I = Current (A)
R = Resistance (Ω/ft)
L = One-way length (ft)
Other Calculators
24V Voltage Drop Calculation Guide
About 24V Systems
24V DC systems are widely used in larger solar systems, trucks, and industrial controls. 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 0.7V 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 24V systems, common wire sizes range from #10 AWG for short runs to #2 AWG for high-current applications. Always verify ampacity requirements alongside voltage drop calculations.