Install Bay Relay 500 Amp Each- IB500

I would like larger posts further apart, but I was able to install this into my 77 K20 plow truck pretty easily.It is wired up to engage when truck is running so it is not an extra battery for starting, but in event I need it as such I can move a wire and pop in that fuse on battery, will just pop it in after review, and it will be engaged full time.Since I have a Lithium reserve battery I could not simply keep it live with my lead acid and not have issues in the cold or actually at any time, would need 2 of the same battery identical battery to not have such a device inline keeping them apart. I had matching batteries prior, but this gives me much more reserve plowing, the plow and controls are electric and not hydraulic, other than lift, on an old Western plow and I noticed after a few hours of plowing in extreme cold my wipers and blower for heater would stall or slow down, and radio would cut out n lights dim before I upgraded the stock wiring to 1/0 and added this new battery and isolation circuit. Now I can plow all night long, have a 220A alternator, and everything works as it does in daytime as it should.As to how long this will provide me service, will update if have any issues as I always do... So far so good.

Haven`t put it to a substantialy long test yet, but so far it operates as it should, will see after I get a heavy load through it.

Using them with 300A fuse for 12V winch on/off. No issues so far, but only gave 4 stars due to complete lack of instruction or spec sheets. NOTE that they use large coils and will throw big (several hundred to 1000V) reverse voltage spikes on the switch circuit when de-energised. This is enough to wreak havoc on solid state components including switch LEDs. Strongly suggest adding flyback protection with diode(s), resistor, cap,etc. Lots of how-to available if you search "flyback" or "relay suppression".

Used this for a 10,000lbs winch on a Jeep. Works great!

Good part. Had to find diagram online to hook it up, wouldn't be hard to include on, but the solenoid worked for what I needed

Super nice relay for adding more than one battery to your automobile. Are used a Chinese off brand from eBay prior and it caught on fire. This is made for 500 A plus

Works good to isolate extra batteries.

Works great!

Works perfectly as a switch to cut power to my winch. The winch can draw a peak of 400a, so some of the smaller options are not ideal.

Its big. It runs my glow plugs on my 7.3. The stock one finally gave up and I wasn't about to put another tiny relay back in.

Pour motorise c'est super