Voltage drop is what kills DC circuits on boats. Size any run properly: drop first, ampacity checked, fuse suggested.
Size a DC cable run properly
Voltage drop is what kills DC circuits on boats — we size for drop first, then check the cable can carry the current.
Panel to the load along the actual cable path — we double it for the return leg.
Your cable spec
Sized on copper resistivity over the round-trip run, then checked against continuous ampacity for tinned marine cable. Guidance for planning — confirm against ABYC E-11 / ISO 13297 for your installation, keep connections crimped and adhesive-heatshrunk, and fuse at the source of power, always.
Get the right cable, cut to length
BEP tinned marine cable, sold per metre — battery cable for the heavy runs, switchboard wire for the small stuff, Lloyd's-approved flex where class matters.
BEP battery cable All cable & wire
BEP tinned marine cable, sold per metre — battery cable for the heavy runs, switchboard wire for the small stuff, Lloyd's-approved flex where class matters.
BEP battery cable All cable & wire