Overview

The Blue Sea Systems 9160 is a paralleling ML Series link bus used to join compatible ML Series components in a high-current DC system. It is made from tin-plated copper and carries a 500A continuous rating, which makes it a practical fit for battery management layouts where low resistance and corrosion control matter.

On board, this part is used when ML Series switches or charging components need a direct parallel connection without building short jumper cables. That keeps the installation cleaner and helps when space is limited around the battery switch cluster, charging relay area, or a compact electrical compartment. This is the copper link itself, not the switch or relay, so the main fit question is whether your system is built around compatible Blue Sea ML Series hardware.

Key features

• 500A continuous rating for high-current battery management circuits
• Tin-plated copper construction that keeps conductivity high and stands up better in damp marine spaces
• Works with all ML-ACRs, all ML-Solenoids, and all ML-Remote Battery Switches
• Creates a fixed parallel connection without fabricating short jumper cables
• Useful where ML Series components are mounted close together and cable routing space is limited

Compatibility and fit

This link bus belongs in Blue Sea ML Series assemblies where compatible components are being paralleled as part of the switching or charging layout. It is also used with PowerBar 1000 setups that call for this ML Series accessory. It is not a general-purpose busbar for unrelated battery hardware, so it should be matched to the ML platform rather than to cable size or system voltage alone.

It makes the most sense on boats with grouped battery control gear, such as a house and start bank setup built around ML remote switches or an ML-ACR arrangement. For refits, it is a straightforward way to tidy up an existing ML installation and remove the extra bulk that comes with short custom cable jumpers.

Installation and setup

Because this is a solid conductive link, terminal spacing, orientation, and protection around nearby live parts still matter during installation. The advantage is a fixed copper path with fewer connection variables than a short cable jumper, but it should still be installed with the same attention to clearance, hardware security, and service access you would expect in any high-current DC section of the boat.

This part suits owners and installers already working inside the Blue Sea ML ecosystem who want a neat parallel connection between compatible components. It is less relevant for systems built around standard manual battery switches, non-ML relays, or layouts that need flexible cable runs instead of a rigid link.