6006 m-Series ON/OFF Battery Isolator Switch with Locking Key, Red

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

This seems to be a high quality switch from a trusted brand. I use it to switch between two house batteries in my VW Westfalia Syncro Camper Van, or to combine both if needed. It also allows me to disconnect both batteries when needed, during wiring or electrical maintenance for example. I will say that it would have been nice to have a set of mounting bolts, however since it can be mounted in various configurations, I can see why they didn't include bolts since they'd have to supply several sets for the various mounting options. I mounted mine to a thin piece of wood in one of my cabinets initially with wood screws, but had to purchase some actual nuts/bolts/washers for a secure fit. Turning the knob to the various positions puts some serious torque on the unit, so a secure mounting job is required and the original wood screws in the pictures didn't last long. If you are mounting to a thicker panel, regular screws might work. Of course, you may want to mount it in one of the different configurations. Wiring is straight forward and I trust this will function for a very long time. Both batteries connect to the switch, which in turn powers a Blue Sea Systems ST Blade ATO/ATC Fuse Block, (https://amzn.to/2ZgpiPw - see picture) which in turn powers all the various and numerous 12v accessories in my van. This makes a great match for safely routing 12V throughout the van using two batteries. I'll update this review should the unit fail or give me problems in the future, but for now, I'm super happy. I could have spent a little less on a lesser known brand of switch, as there are many choices on Amazon, but Blue Sea Systems has a great reputation and I felt like it was worth a few extra bucks. I really don't want to burn down my van due to some cheap electrical switch!

Great support and instructions available, built very well and exceeds my expectation of quality. Easy to wire and mount, just wish it came with mounting hardware like screws or nuts and bolts. Best value for my money with such high standards of quality in a switch that is used very frequently. Really makes my battery life last with the ability to use as a disconnect switch.

I installed this diconnect in my dad's pontoon boat to disconnect the battery and stop parasitic draw on the battery when the boat sits. It worked like a charm. It is very durable with a heavy detent and a audible heavy click into place. The installation was straight forward. It looks nice and is smaller than competing product. It seems to be holding up well and is handling the outdoor weather well. The price is competitive on this one. You get a true marine grade disconnect at a good price.

Nice gear for 12 and 24VDC lithium systems. The Good: Easy install. Easy clean mounting. Clean, fast connect and disconnect when rotating. Runs reasonably cool (hardly over ambient temps). The Bad: I got nothing, they’re great. ———— However… if you use them OVER the rated voltage use caution. It’s not rated for ‘nominal 48VDC’ (>=52VDC in the Li world). That caused some issues with the mechanism over time. Never failed to make or break a connection. However, arc suppression is clearly visible during high current inrush and disconnect events. One switch began to run a bit warmer after dozen or two of those high current on/off actions. (Yes, I confirmed it was properly torqued with good lugs.) ——— Overall: Great switch. They have operated flawlessly on my 12VDC and 24VDC circuits for well over a decade. Don’t be complacent about the operating voltage rating! (It’s easy to talk yourself into a ‘nominal 48V’ system.)

The switch seems to be made of good solid components, the switch firmly clicks off and on and the studs are very solid, I think this is a product that will last for years

I bought this to turn on/off my boat's main battery. It works just as intended. It has breakaway access locations on all four sides, so it can accommodate multiple different setups. Blue Sea is a very reputable brand in marine electronics, so I trust it will work well and last. If I recall correctly, it doesn't come with mounting fasteners.

High quality battery cutoff switch. Would I like about this one is we put two large capacity lithium batteries in a sprinter van if you need to switch over to one particular battery you can or just switch it to both. Of course you really want to stay on both so they stay balanced but it's nice to have that feature just in case of an emergency or for some reason you had to bring one up higher than the other one if it was lagging. Very solid switch that's the second one I bought. Also like that you can make it surface mount with the case that comes with it or take off the box case and submerge it into a wall which we did. Very good quality product