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06-23-2022, 01:39 PM #1
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DC to DC chargers in conjunction with emergency breakaway switch
So I'm run into a bit of a concern and could use some advice on the best way to rectify an issue. Current setup is 1000ah of BB front ended by a Victron 12/12-18 to provide charge during those cloudy travel days. I'm powering the DC/DC converter via the 10ga wires in my 7way. I know I should probably run a dedicated circuit with larger wires from the truck battery, but I'm not fully convinced as charging is working great currently and wires/connectors are not getting warm due to the relatively low draw. My issue comes in when the emergency breakaway cable is pulled and the 7way is disconnected. Normally this would short the 12v+ to the hydraulic trailer brake booster activating the brakes, but with the DC/DC charger in the path, there's no 12v+ connection available at the 7way junction box and so there's no emergency braking. Is the easiest option just to run a 12v+ wire from my busbar to the input side of the breakaway switch? Thanks in advance.
Matt & Danielle
2022 F350 DRW Platinum 6.7L
2022 Solitude 382WB-R, 8k Morryde IS/Disc, DPW, FBP, 5.5kw Onan, 1kAh BB, Victron MPii 2x120
Engineer, Cattle Rancher/Grass Farmer, Aviator
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06-23-2022, 03:10 PM #2
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- Aug 2017
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Yes - power the break away switch directly to the RV battery. Then if the 7 pin connector comes out OR the break away switch is activated the RV's brakes are actuated directly from the RV's battery.
Now I need to go out and verify my wiring as I just installed a DC-DC Converter but run it directly from the truck's battery.
Here is a photo from my Carlisle brake controller installation manual that shows how they recommend it.
Last edited by traveldawg; 06-23-2022 at 03:18 PM.
Larry KE4DMG
2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
Search kalakamods for my mods
Sad trailer this week
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