Voltage drop check

This tool allows you to quickly and easily estimate the voltage drop in low-voltage DC wiring (12V, 24V, or 48V).

A correct assessment of the voltage drop is essential to ensure the proper functioning of connected devices: excessively high values ​​can cause malfunctions, reduced performance, or premature wear of the devices.

To obtain the result, you will be asked to enter:

  • Cable conductor material
  • Internal cross-sectional area of ​​the cable (excluding the insulation)
  • Cable length (one-way)
  • Supply voltage (12V, 24V, or 48V)
  • Power rating of the individual device
  • Total number of connected devices

The calculation returns the estimated voltage drop along the cable, helping you determine whether the selected cable size is adequate or whether a larger cable is needed.

Helpful Tips:
Excessive voltage drop can compromise the proper operation of the system. In general, it is good practice to keep the drop within reasonable limits (typically a few percentage points of the nominal voltage).

It is recommended to choose a power supply 30% more powerful than the total load.

N.B. If the appliances are distributed along the cable, enter the individual power and actual quantities.
If they are all connected at the end of the line, it is advisable to enter the overall total power and indicate only 1 appliance.

This calculator is for illustrative purposes only. It does not take into account factors such as temperature, installation method, connection quality, or specific technical standards. For critical applications or permanent installations, the assistance of a qualified professional is always recommended.