Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK

Worked great on my pioneer 1000 side by side

Added a second battery to my fj cruiser and wanted to isolate the house battery when the engine was off so that my starting battery would be fresh to start, this is well made and works perfect.I added a switch inside the cab so that I can also shut off manually

Exactly what i ordered, and work great.

Installed for use with second battery, install was easy

Works well, easy to install

Awesome value

Had to return this one for an upgrade. Stinger makes good stuff!!

This wasn't exactly what I was looking for but it does the job and does it well. I was looking for an isolator and this doesn't really isolate the batteries until the ignition is off. I also installed this in a boat that doesn't have a true ignition source. ( push button start with a sealed switch that I couldn't break into ) I ended up running a small wire from the battery to a switch on the dash then to the isolator. I hit the switch to activate the relay.There is very little info anywhere on how this works so maybe I can help some future buyers. It is simply a relay swith. One large power wire from charging source to first battery, then another large wire from that same post to one of the top posts on the isolator/relay. Lastly you run a large power wire from the 2nd top post of the relay to the second battery. When you turn on your ignition it sends power to the unit which engages the relay completing the circuit between the two batteries, thus connecting them and simultaneously charging them. Turn ignition off and the relay disengages making it impossible for one battery to drain the other but also makes the second battery unable to be charged. ( why it needs to be a true ignition source )