Egis 6100-004 Battery Post Busbar Kit 60V 100A

If you've ever tried to land four or five ring terminals onto a single battery post, you know the drill. The stack gets tall, the nut barely catches the last thread, and the whole connection works loose after a season of vibration. The Egis Mobile Electric 6100-004 Battery Terminal Mount Busbar Kit fixes that. It mounts right on your threaded battery posts and gives you clean, organized distribution points for both the positive and negative sides of your DC system.

This is a two-piece kit. You get a positive busbar and a negative busbar, each with its own color-coded insulating cover, red for positive and black for negative. Each bar carries one main ring terminal connection plus four screw terminals, so you can fan out your accessory circuits without piling ring after ring onto the post itself. The bars are tin plated copper, which is exactly what you want in a marine environment. Copper for conductivity, tin plating to fight the corrosion that eats bare copper alive around salt air and bilge moisture.

Each bar is rated for 60 volts DC and 100 amps, so it covers 12V and 24V house and starting systems with plenty of headroom. At 2.93 inches long and 1.88 inches wide, it stays compact enough to tuck into a battery box or a tight engine compartment. The one-way cable entry keeps your feed wire routed cleanly to one side instead of crossing over the top of the bar.

Why screw terminals instead of another stud stack? Reliability. The screw-down connections let you land smaller accessory wires securely without needing a crimped ring on every one, and they hold better under constant vibration than a loose nut ever will. The kit ships with stainless steel self-locking hardware, so the fasteners resist backing out when your boat is pounding through chop all day.

Installation is straightforward. Pull the insulating cover, set the busbar over the threaded battery post, and secure it with the supplied hardware. Land your main cable on the ring terminal, then bring your accessory circuits into the four screw terminals. Snap the red or black cover back over the top and you've got a finished, insulated connection point that won't short against a dropped tool or a stray wire. It's the kind of tidy install you'd expect to see on a well-rigged boat.

Who's this for? Anyone adding accessories to a battery and running out of room on the post. Think fish finders, bilge pumps, stereo amps, LED lighting, charge controllers, and small inverters. If you've got a growing DC load list and a messy post, this kit brings order to it. It's equally at home in emergency and municipal fleet vehicles, RVs, and specialty rigs, but it's built to marine-grade standards first.

A quick note on what it isn't. This is a battery-post-mount distribution busbar, not a fused block. There's no built-in fusing or circuit protection here, so you'll still want inline fuses or a fuse block downstream for each protected circuit. And because it lands directly on the battery terminal, it's meant for point-of-source distribution, not a remote panel location. Match your wire gauge and total accessory draw to the 100 amp rating and you'll be in good shape.

Egis Mobile Electric has spent more than 25 years building electrical power and battery protection gear for marine, fleet, and specialty vehicle use. This busbar kit is a small part, but it's the kind of small part that quietly makes a whole electrical system cleaner and more dependable. Get the connections right at the battery and everything downstream is easier to live with. Troubleshooting is faster too, because every accessory circuit lands at one clearly marked point instead of hiding somewhere in a tangled stack on the post.