Fastronix 3/8" 2-Position 180/1000A High Current Master Battery Disconnect Switch - Aluminum, Toggle, Rotary, ON-OFF

i installed 2 of these on my race truck in series. they have been working great and are heavy duty

Very heavy duty, much larger than I had expected but great product

I learnt about Fastronix product from another review which recommended buying this make over a much cheaper brand. This switch has a real heavy duty feel to it. When you turn it on you know it is on! And when you turn it off you know its off! There is nothing wishy washy about this one! worth the extra money.

Buena calidad

I put this in the seat pedestal of my 2020 Sprinter to serve as a disconnect for the connection between the starter battery and the solar system in the back. By connecting the smaller posts to the ignition wire that has voltage only when the vehicle is running, I was able to send that signal to the back as well, which I use with a relay to switch between a Victron DC-DC charger (which pulls from the engine while running and safely charges the Lithium batteries according to their charge profiles) and a Magnum smart battery combiner (which sends power to from the Solar/Lithium system when the car is not running, calibrated so that it only connects when the Lithiums are nearly full). This setup ensures my electric sliding door no longer drains my starter battery. All this to say, I appreciate having a solid switch like this to completely disconnect the two systems when it's time for maintenance. Unlike most other battery switches I found, being able to recess the bulk of it in the seat pedestal and only expose the relatively low profile switch means it's not a trip hazard. The solid click when I turn it on gives confidence it won't accidentally turn off, and it feels very sturdy. Very happy with this purchase. May as well get the kit with the rubber post covers if you don't already have them, they are a useful bit of extra protection.