Bus Bars and Studs

12V Bus Bars and Terminal Studs for Organised DC Power Distribution

A DC bus bar gives you one solid, low-resistance point to join multiple positive or negative cables, so you are not stacking lugs on battery posts. This range covers 12V bus bars and terminal studs rated from 150A to 1000A. It includes Victron busbars, the Victron Lynx system and Blue Sea PowerPost connectors, plus colour-coded red and black stud busbars with insulating covers.

How to Choose the Right Bus Bar

Start with the total current the bus bar will carry, then match the stud size to your cable lugs. A bus bar's rating should suit the continuous load, not only short peaks. Our guide on why continuous current ratings matter explains why this protects your wiring and equipment.

• Current rating: 150A, 250A, 300A and 600A busbars, plus 1000A Victron Lynx Power In and Lynx Distributor modules.
• Stud size: M6, M8 and M10 studs, with Blue Sea options in 5/16", 3/8" and 10-32 thread.
• Terminal count: layouts from 2 to 8 studs, with some models adding 5 to 20 screw terminals for smaller accessory cables.
• Polarity identification: red positive and black negative bus bars make fault finding and servicing simpler.
• Covers and insulation: most busbars include a cover. Blue Sea MaxiBus insulating covers suit models 2105, 2126, 2127 and 2128.

Victron Lynx, Victron Busbars and Blue Sea PowerPosts

The Victron Lynx Power In, Lynx Class-T Power In and Lynx Distributor are 1000A M10 positive and negative busbar modules in an enclosed housing. The Lynx Distributor also holds MEGA fuses, and a Lynx Power In bolt kit for MEGA fuses is available. Victron 150A, 250A and 600A busbars with covers suit compact battery boxes and switchboards.

For single-point joins, Blue Sea PowerPost connectors and single or dual terminal studs, including the linked Victron M8 dual terminal stud set, give a tidy junction for feed-through or pass-through wiring.

Pair your bus bar with correctly sized cable lugs to suit each stud diameter, or see the wider connectors, busbars and terminals range.

Frequently Asked Questions

Do I need a separate positive and negative bus bar?

Most 12V systems use one of each. A negative bus bar collects all returns, including the battery monitor shunt connection, and the positive bus bar feeds fused circuits.

What size bus bar suits a 2000W 12V inverter?

A 2000W inverter can draw well over 150A at 12V, so a 300A or 600A busbar with M10 studs, or a Victron Lynx module, is the more suitable choice.

Can I use a 12V bus bar in 24V or 48V systems?

Bus bars are rated by current. Check each product's voltage specification before you install it on higher-voltage systems.

Why use a bus bar with a cover?

A cover reduces the risk of accidental shorts from tools or loose items in caravans, boats, 4WD canopies and trucks.

Build a Safer, Tidier DC System

Choose the current rating and stud size that match your cabling today. A well-sized bus bar keeps connections secure, simplifies future upgrades and makes your battery system easier to service.