Voltage Drop DC (12/24/48 V, PV)

Electricity
17 calculations
📝 How it works:
Voltage drop for direct current across the outgoing and return conductor for low-voltage and PV-DC systems.

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e.g. 12/24/48 V or PV string voltage
One-way length; outgoing and return conductor are accounted for

With direct current the voltage drops across both the outgoing and return conductor: U = 2 × L × I × ρ / A. ρ is the resistivity (copper 1/56, aluminium 1/35 Ω·mm²/m), L the one-way length.

Especially in 12/24/48 V systems and PV-DC strings the percentage voltage drop is critical and should stay below about 3 %.

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