Blue Sea Systems 300 Amp m-Series Battery Switches

We needed isolation switches for our campervan electrics and after a lot of research we found that these were the most highly regarded. They do cost a little more than the cheap replicas but are of much better quality and there is a reason that replicas are created of these in particular. Easy to install considering we are noobs but that is thanks to YouTube.

Great quality, does the job!

I have purchase both Blue sea and so called cheap knock off. Firstly the plastic mouldings are either direct copies or they use the same toolset. The mouldings marks are all identical even down to the blemish’s in the moulds. The switch operation feels identical and measured contact resistances are actually higher (0.2ohms) on the Blue sea product. People mention better sealing in Blue Sea’s product, I can’t see any seals on either product. The Blue Sea’s product also arrived in bubble wrap, no box! no instructions, guarantee card or any literature. At twice the price of an equivalent non Blue Sea product I’d say be sure you’re getting your moneys worth.

Massiv, kleiner Überganswiderstand, Flexible Montage möglich.

Sin problema, funciona perfecto

I bought some cheaper switches and realized they don't seal properly and are made of cheap conducting components. I did not dare use the cheap switches with the amount of power I want to manage. SO I FOUND THIS SWITCH, ORDERED IT AND WOW, I GOT WHAT I WAS EXPECTING INSTEAD OF A CHEAP KNOCK OFF UNIT. This switch is sealed, is very robust, is made with quality conductors not cheap little bits of metal. THIS IS A PRO GRADE UNIT MADE TO LAST. IT IS TOUGH, SAFE, HIGHEST QUALITY AND IS GOING TO WORK GREAT WITH MY 0 POWER CABLES AT 300 AMPS. Shawn from Canada

Poor quality. After a while of use doesn’t actually turn off all power flow. Not safe.

The Blue Sea Systems 6006 m-Series ON/OFF Battery Isolator Switch is exactly what you want in a critical electrical component: simple, reliable, and built to last. The build quality is outstanding — solid terminals, smooth but positive switching action, and materials that clearly hold up in a marine environment. Installation is straightforward, and the compact m-Series design makes it easy to fit even in tight battery compartments. What really stands out is the confidence it gives you. When it’s OFF, it’s truly OFF. When it’s ON, you know your system is connected without voltage drop or fuss. It handles high current loads effortlessly and stays cool under use. Typical Blue Sea attention to detail shows through: clear labeling, removable knob for safety, and excellent corrosion resistance. This is one of those products you install once and then never think about again — which is exactly what you want for a battery isolator. If you’re upgrading or replacing a battery switch, don’t hesitate. The 6006 is worth every penny and sets the standard for marine electrical hardware. Highly recommende