1-2-Both-Off Battery Switch 12V-60V Battery Disconnect Master Cut Shut Off for Marine Boat Car RV ATV Vehicle Heavy Duty Battery Isolator Switch

Works great. Would buy again

No it’s not a Blue Sea or Perko but it does its job well for my application. I wanted to add a 12 volt dc light over my sump pit, using the sump pump battery. I have the sump backup pump and light wired through this switch. Now for the boat I would recommend paying for the Blue Sea or Perko battery switch. They are simply built better, you do get what you pay for here. The terminals are close enough together that it would be hard to route number fours and heavier gauge wires to this switch. You would have route them from at least two different directions, if not three, as this switch is considerably smaller than the other brands I have mentioned. 5 Stars for this application, for a boat where you need reliability and such, just buy a BlueSea or Perko switch.

Perfect

Although the unit came in an OpenBox its simplicity suggested that it would not have been damaged by others prior to me. I was right. The switch was installed with little effort and is a great addition to my electrical system. Sure..recommended.

divided my batteries up and now i can feel safe i always have a back up battery just in case.

Large easy to see and color identified swith for battery disconnect

Switch broke second time on water and would not power any of the accessories off the second battery. I verified the switch was broke using a multimeter and confirming continuity when selecting the different battery configurations. Do not recommend.

I used it for two years but never figured out how it was supposed to work. I had only one set of batteries. Sometimes it worked only when I put it in 'Both' batteries, sometimes in 'Battery #1' and sometimes in 'Battery 2'. I didn't open it to check how the internal connection was set up.