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Hooking up a Vitron 30amp DC to DC charger from truck camper to truck battery.

Doug Longshore.
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Doug Longshore. New Member

Doug Longshore.

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My 2023 Siverado 2500 HD Duramax has 2 batteries--one on the passenger side , the other on the drivers side. Does it matter what battery I hook to? The drivers side does seem to have an open slot on the bus bar.  What is the best way to attach a 60 amp fuse in this location?  Thanks in advance for your help.

Another JR Senior Enthusiast

Another JR

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On the diesel the two batteries are wired in parallel with no isolator. You can connect to either battery. Using a convenient open slot on a battery fuse block is the way to go. I’m not sure of the best way to do the hardware connection if no unused fuses are installed. Maybe a separate ANL fuse block or a Blue Sea circuit breaker/switch mounted right near the battery?  I was able to connect to an unused 80 amp fuse on my main battery (passenger side battery on gas truck) and ran 6awg wire to the Victron 12/12-30 in my slide-in camper. 

rjgvt Enthusiast

rjgvt

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Posted

I would connect a fuse to the nut with an appropriate sized insulated ring lug.

 

I did something similar with my Aux battery to get 12v inside the cab.

 

 

Aux battery connection.jpg

  • 2 weeks later...
  • 3 weeks later...
PBNB Enthusiast

PBNB

Posted
Posted
On 6/8/2025 at 11:50 AM, gemarsh said:

You could buy a gm aux switch fuse kit. It comes with a bussbar and 60 amp and 200 amp fuses.

 

https://www.ebay.com/itm/226800657964

We got the complete kit when we bought the 3500 HD. It wasn't installed but we got all the parts and I installed it myself. 

 

This kit works with the AUX buttons that you might already have.? Mine we were already installed but nothing was behind them so I asked for the rest of the kit and the salesman came back with all the parts, fuses, little fuse block, etc...  I added my build sheet showing the kit.

 

I have used 2 of them so far and a DC to DC convertor is on my list to add.

 

Screenshot2024-11-17at12_49_34PM.thumb.png.97421717a1f75e1691895cdbeda5adee.pngimage.thumb.png.cd458c59908c56647aaf4bbb9d934073.png

Another JR Senior Enthusiast

Another JR

Posted
Posted
3 hours ago, PBNB said:

We got the complete kit when we bought the 3500 HD. It wasn't installed but we got all the parts and I installed it myself. 

 

This kit works with the AUX buttons that you might already have.? Mine we were already installed but nothing was behind them so I asked for the rest of the kit and the salesman came back with all the parts, fuses, little fuse block, etc...  I added my build sheet showing the kit.

 

I have used 2 of them so far and a DC to DC convertor is on my list to add.

 

Screenshot2024-11-17at12_49_34PM.thumb.png.97421717a1f75e1691895cdbeda5adee.pngimage.thumb.png.cd458c59908c56647aaf4bbb9d934073.png

Hopefully the dealer didn’t charge you for the kit they supplied to you. If you bought the upfitter switches option the entire kit was included in the option price. 

PBNB Enthusiast

PBNB

Posted
Posted
1 hour ago, Another JR said:

Hopefully the dealer didn’t charge you for the kit they supplied to you. If you bought the upfitter switches option the entire kit was included in the option price. 

The dealer didn't charge me and made sure that I had every part and bolt to complete it. I installed it myself and it wasn't too bad considering I already had the buttons installed in the kick panel.

 

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