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In your diagram you can wire it so you cut off the 'green' and leave the "blue" alone or as Mogman pointed out do it the opposite way. That effectively does the same thing assuming you cut off both switches. I like doing it my way by cutting off the interconnect between the batteries in case I...

Got it. That makes sense. I can attest leaving the inter battery OR 14V feed connected is bad idea for BCO.

Steven I think that's true if you only disconnect the low battery ground. If you disconnect BOTH high and low battery ground it all goes dead. I can say that was true for me when the battery interconnect was still connected, ie cable between high and low battery. As soon as I added that to...

It shuts down the TCM (aftermarket US Shift) which does throw it in limp mode. I thought throwing the disconnect would shut off the fuel solenoid and thereby shut down the engine. But the generator must keep the solenoid alive.

Here is the pdf to the specs on the switch. This is identical to the military switch.

Ok here are the final pictures. I installed a Noco dual plug for the Victron battery chargers. These chargers are really nice as they are completely waterproof as the electronics are potted in epoxy. I have two of the chargers in the box plugged into the Noco plug and they are connected to...

Juan here is link to more pics of everything in kit. https://www.govplanet.com/for-sale/Parts-%289%29-US-Hardware-Supply-57K6230-Battery-Disconnect-Switch-Accessory-Kits-Pennsylvania/6811791/NSN/6130-01-611-4219

When current gets pulled in reverse. I might be using wrong terms. I’ve tried reading about this and have hard time pulling much up on google. Might be using wrong search terms. Adding to what we were discussing. For example, rear battery ground disconnected then someone turns on...

Anyone know if the voltage regulator can get damaged if it goes false ground? How would you know or test for it?

Agree. That’s perfect setup I believe. Sourcing cables to do it now. Will update with pics when done. will do Here is a pic of the kit. Comes with the cables and switch obviously. You could easily do thiswith same parts for 1/4 the price of formal kit. I will scan the install manual to...

Agree. These are dual switches. if you disconnect the inter battery cable there will be no way for forward battery to find ground. the reason to use that as disconnect is it’s SLL local, ie easier to run and hookup cables to switch. otherwise hard to extend VR cable.

Mogman I think that’s the point lol……I want to cut everything off when I use the switch. Sent from my iPhone using Tapatalk

NDT it’s the second pic I posted. That’s military setup. Cut off at feed. Sent from my iPhone using Tapatalk

I hooked it all up tonight. Main ground is on switch. Did not add the interbattery cable to the switch or the 12V or 14V alternator to the switch. Interestingly the lights can still go on and some of the gauges click on. I did NOT try to cycle plugs or try to start for fear of blowing...

Great idea and great link. Did not know about that site. Thanks.

That’s the way they are set up from factory at least for the TCM 12V. I have a 200amp alternator with 14V feed. My understanding is this will keep it in balance. Is this wrong?

Here are some pics of the two switches I have now. The one with the black handle is the one that comes in military kit. The one with the red handle I got from a friend. They are both 2 pole and 500amp per pole. They are made by same swiss company (Kissling). High quality...

Why would the military not do it this way, ie use the ground as the cutoff rather than the positive feed? Have to think they put more thought into this than I did LOL.

I have a military cutoff switch kit and it's instructions. It essentially cuts off the positive feed to the busbar from the front battery and the feed to (from) the voltage regulator and 12V circuit (TCM/circuit breaker) using a 4 pole/2 switch box. My concern is cutting off the positive feed...