DaierTek 300A Bus Bar 12V Marine 12V Power Distribution Block with Cover 6 x 3/8" (M10) Terminal Studs Max 300V AC 48V DC Positive & Ground Busbar for Automotive Car Boat

These are top notch!I purchased this because I have had my positive and negative terminals stacked to the max! The bus bars eliminate the stacking of wires on the terminals and also allows me to remove each device without cutting power to everything and risking the terminal sparking.

Works as described.

Nice buss bar at a great price point. I’ve ordered dozens of this style. The base is very sturdy.

The product match perfect the description. The quality is perfect

Shipped fast and arrived Faster. Heavy duty. Fits 1/0 awg- easily.

This is for the most part, a nice bus bar. I’ve always called them a distribution block.I do wish they made the 300a with a 5/16 option instead of just 3/8.This is a solid build and works well with only one major complaint. The cover is terrible. It’s like the designer put ample thought into the whole thing but little thought into the cover.The first problem is that the outside edges leave too much exposed. See the photo. This could obviously be an issue with the positive bus bar, if it came in contact with anything that could ground it. . If the cover went completely over the ends, it would remedy that.The second issue with the cover, is that it’s just not secure. It doesn’t snap or lock into place. It’s simply held in place by the two rubber bushings. I can see the cover falling off and then getting lost from being bumped or from vibration. Especially if it’s mounted vertically.I came up with my own solution and put two zip ties around it. Still, if I need to put more on it later, I would have to loosen the bus bar end screws to slide another two zip ties under the bottom.Such a great bus bar with a crappy cover design.

Works

I'm using these DaierTek 300-amp busbars as components in my expansion of our large DIY off-grid home solar power system. Busbars like these make the task of efficiently organizing large battery cables much less difficult.I carefully measured the dimensions of the conducting busbar, and these are true 300-amp conductors. The nuts thread very smoothly onto to studs. At $40, I consider them a good value.