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

Perfect

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.

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

It is smaller than the picture would indicate but upon reading I see the dimensions are clear. It is small but it works great on my Four Winds 3 l inboard.

Planned a 2 battery switching system for quite some time for obvious reasons. These switches can get terribly expensive. When I found this price it was time to complete the project. I didn't mount it where it would be in the weather. Just seemed like a bad idea. I can see where a dashboard mount would be convenient but I mounted it inside the battery covers under and enclosure so weather will not an issue. Lift the lid switch the battery on, no big deal. It is a heavy A/B/A+B/ OFF rotary switch. The connection bolts appear to be stainless steel so corrosion shouldn't be an issue, I coat them with dielectric grease anyway. This is the same heavy duty switch sold in the marine stores for way more money.

Large easy to see and color identified swith for battery disconnect

Does NOT allow for normal electrical pass through. Too much resistance. OEM warning buzzer wouldn't shut off until I disconnected switch and hooked straight to battery. Here is the complete story: I purchased this switch a few weeks ago with excitement to have two batteries; I was tired of dragging a jumper pack. Started great and on the lake we went, with high hopes to get some boating in on July 4, 2023 (Independence Day). Warning buzzer was screaming in idle, which made helping three people on a flipped wave runner frustrating. Ran the boat for almost an hour before I shut the boat off in the middle of Utah lake, bad idea. Boat ignition switch was completely useless (dead completely). I directly connected to the battery, bypassing this switch, and it started right up. Don't forget your tools like I did!! Wife and daughter are already timid to be on a lake and this didn't help. Go back to the old reliable, extra battery (not connected) or jumper pack.

Works great. Would buy again